1,721,007 research outputs found
Scaling Of Nonlinear Complex Susceptibility Applied To The Study Of Type-ii Superconductors
No full textDifferent χ measurements can be collapsed into a single universal curve if plotted against the scaling variable h(ω̃/ω)1/σ or, more generally, h/Jd, where J(T,B,ω) is a frequency dependent shielding current density, d is the sample half-width and h is the AC field amplitude. We have tested these scaling laws for two Nb samples, one melt textured YBCO sample, and one Er123 single crystal. Further, we found that J(T,B,ω) for Er123 displays a behavior closely related to the second magnetization peak (fishtail effect), observed in M × H curves. Our results are satisfactorily interpreted in terms of vortex dynamic models. © 2001 Elsevier Science B.V.3541-4165172Brandt, E.H., (1998) Phys. Rev. B, 58, p. 6506Brandt, E.H., (1998) Phys. Rev. B, 58, p. 6523Zeldov, E., (1990) Appl. Phys. Lett., 56, p. 680Cardoso, C.A., De Lima, O.F., (1999) Bull. Amer. Phys. Soc., 44 (1), p. 1283De Lima, O.F., Cardoso, C.A., (2000) Phys. Rev. B, 61, p. 11722Cardoso, C.A., De Lima, O.F., (2000) Physica C, 334, p. 185Avila, M.A., (2000), Ph.D. Thesis, University of Campinas (UNICAMP), BrazilDe Andrade R., Jr., De Lima, O.F., (1995) Phys. Rev. B, 51, p. 9383De Lima, O.F., De Andrade R., Jr., (1995) Physica C, 248, p. 353Araújo-Moreira, F.M., Ortiz, W.A., De Lima, O.F., (1999) Physica C, 311, p. 98Brito, A.S., Zerweck, G., De Lima, O.F., (1979) J. Low Temp. Phys., 36, p. 33De Lima, O.F., Avila, M.A., Cardoso, C.A., (1997) Physica C, 282-287, p. 2201Bean, C.P., (1964) Rev. Mod. Phys., 36, p. 31Civale, L., Worthington, T., Worthington, K., Krusin-Elbaum, L., Holtzberg, F., (1991) Magnetic Susceptibility of Superconductors and Other Spin Systems, p. 313. , R.A. Hein, T.L. Francavilla, D.H. Liebenberg (Eds.), Plenum, New YorkQin, M.J., Yao, X.X., (1996) Phys. Rev. B, 54, p. 7536Fàbrega, L., (1994) Phys. Rev. B, 50, p. 1199Fàbrega, L., Fontcuberta, J., Civale, L., Piñol, S., (1994) Phys. Rev. B, 50, p. 1199Jönsson, B.J., Rao, K.V., Yun, S.H., Karlsson, U.O., (1998) Phys. Rev. B, 58, p. 5862Blatter, G., (1994) Rev. Mod. Phys., 66, p. 1125Fisher, M.P.A., (1989) Phys. Rev. Lett., 62, p. 1415Yeshurun, Y., (1994) Phys. Rev. B, 49, p. 1548Jönsson, B.J., (1999) Phys. Rev. B, 60, p. 1491
Specific Heat And Magnetic Properties Of Nd0.5sr 0.5mno3 And R0.5ca0.5mno 3 (r=nd, Sm, Dy, And Ho)
Full text linkMagnetization and specific heat measurements of Nd0.5Sr 0.5Mn3 and R0.5Ca0.5MnO3 were performed. The entropy variation corresponding to the CO transition was higher than the corresponding to the ferromagnetic transition. The specific heat curves showed an abrupt change in slope for the two compounds with Nd 3+ ions, which were correlated with the corresponding antiferromagnetic transition.94743954399Radaelli, P.G., Cox, D.E., Marezio, M., Cheong, S.-W., (1997) Phys. Rev. B, 55, p. 3015Zhao, G., Ghosh, K., Greene, R.L., (1998) J. Phys. Condens. Matter, 10, pp. L737Moritomo, Y., (1999) Phys. Rev. B, 60, p. 10374Xiao, G., Gong, G.Q., Canedy, C.L., McNiff E.J., Jr., Gupta, A., (1997) J. Appl. Phys., 81, p. 5324Mori, S., Chen, C.H., Cheong, S.-W., (1998) Nature (London), 392, p. 473López, J., Lisboa-Filho, P.N., Passos, W.A.C., Ortiz, W.A., Araujo-Moreira, F.M., (2001) J. Magn. Magn. Mater., 226, p. 507http://arxiv.org/abs/cond-mat/0004460López, J., Lisboa Filho, P.N., Passos, W.A.C., Ortiz, W.A., Araujo-Moreira, F.M., Ghosh, K., De Lima, O.F., Schaniel, D., (2001) Phys. Rev. B, 63, p. 224422http://arxiv.org/abs/cond-mat/0103305Salamon, M.B., Jaime, M., (2001) Rev. Mod. Phys., 73, p. 583Ghivelder, L., Abrego Castillo, I., Gusmão, M.A., Alonso, J.A., Cohen, L.F., (1999) Phys. Rev. B, 60, p. 12184Schnelle, W., Poddar, A., Murugaraj, P., Gmelin, E., Kremer, R.K., Sasaki, K., Maier, J., (2000) J. Phys.: Condens. Matter, 12, p. 4001Gordon, J.E., Fisher, R.A., Jia, Y.X., Phillips, N.E., Reklis, S.F., Wright, D.A., Zettl, A., (1999) Phys. Rev. B, 59, p. 127Bartolomé, F., Bartolomé, J., Castro, M., Melero, J.J., (2000) Phys. Rev. B, 62, p. 1058Smolyaninova, V.N., Ghosh, K., Greene, R.L., (1998) Phys. Rev. B, 58, pp. R14725Smolyaninova, V.N., Biswas, A., Zhang, X., Kim, K.H., Kim, B.-G., Cheong, S.-W., Greene, R.L., (2000) Phys. Rev. B, 62, pp. R6093López, J., Lisboa-Filho, P.N., De Lima, O.F., Araujo-Moreira, F.M., (2002) J. Magn. Magn. Mater., 242, p. 683http://arxiv.org/abs/cond-mat/0105571López, J., Lisboa-Filho, P.N., De Lima, O.F., Araujo-Moreira, F.M., (2002) Phys. Rev. B, 66, p. 214402http://arxiv.org/abs/cond-mat/0208381Filho, L., Zanetti, P.N.S.M., Leite, E.R., Ortiz, W.A., (1999) Mater. Lett., 38, p. 289Kajimoto, R., Yoshizawa, H., Kawano, H., Kuwahara, H., Tokura, Y., Ohoyama, K., Ohashi, M., (1999) Phys. Rev. B, 60, p. 9506Millange, F., De Brion, S., Chouteau, G., (2000) Phys. Rev. B, 62, p. 5619Tokura, Y., Tomioka, Y., (1999) J. Magn. Magn. Mater., 200, p. 1Terai, T., Sasaki, T., Kakeshita, T., Fukuda, T., Saburi, T., Kitagawa, H., Kindo, K., Honda, M., (2001) Phys. Rev. B, 61, p. 3488Mathieu, R., Nordblad, P., Raju, A.R., Rao, C.N.R., (2001), http://arxiv.org/abs/cond-mat/0106606Ramirez, A.P., Schiffer, P., Cheong, S.-W., Chen, C.H., Bao, W., Palstra, T.T.M., Gammel, P.L., Zegarski, B., (1996) Phys. Rev. Lett., 76, p. 3188Raychaudhuri, A.K., Guha, A., Das, I., Rawat, R., Rao, C.N.R., (2001) Phys. Rev. B, 64, p. 165111Shimomura, S., Tajima, K., Wakabayashi, N., Kobayashi, S., Kuwahara, H., Tokura, Y., (1999) J. Phys. Soc. Jpn., 68, p. 194
Fishtail Effect Studied By Ac Susceptibility In Erba2cu3o7-δ Single Crystal
Full text linkA study of the second magnetization peak (SMP) using a scaling procedure for ac susceptibility measurements, in an ErBa2Cu3O7-δ single crystal is presented. In addition, its sample size dependence, ac susceptibility (χ) is a very versatile technique, widely used in the study and characterization of superconducting materials. Its major advantages are the experimental simplicity, low cost, and great sensitivity.95313011306Berlincourt, T.G., Hake, R.R., Leslie, D.H., (1961) Phys. Rev. Lett., 6, p. 671Däumling, M., Seuntjens, J.M., Larbalestier, D.C., (1990) Nature (London), 346, p. 332Bean, C.P., (1962) Phys. Rev. Lett., 8, p. 250Bean, C.P., (1964) Rev. Mod. Phys., 36, p. 31Vargas, J.L., Larbalestier, D.C., (1992) Appl. Phys. Lett., 60, p. 1741Osofsky, M.S., Cohn, J.L., Skelton, E.F., Miller, M.M., Soulen Jr., R.J., Wolf, S.A., Vanderah, T.A., (1992) Phys. Rev. B, 45, p. 4916Harneit, W., (1996) Physica C, 267, p. 270Yeshurun, Y., Malozemoff, A.P., Shaulov, A., (1996) Rev. Mod. Phys., 68, p. 911Blatter, G., Feigel'man, M.V., Geshkenbein, V.B., Larkin, A.I., Vinokur, V.M., (1994) Rev. Mod. Phys., 66, p. 1125Krusin-Elbaum, L., Civale, L., Vinokur, V.M., Holtzberg, F., (1992) Phys. Rev. Lett., 69, p. 2280Yeshurun, Y., Bontemps, N., Burlachkov, L., Kapitulnik, A., (1994) Phys. Rev. B, 49, p. 1548Abulafia, Y., (1996) Phys. Rev. Lett., 77, p. 1596Farmer, J.W., Kornecki, M., Cowan, D.L., (2001) Physica C, 364, p. 334Mikitik, G.P., Brandt, E.H., (2001) Phys. Rev. B, 64, p. 184514Yamaguchi, Y., Shirakawa, N., Rajaram, G., Oka, K., Mumtaz, A., Obara, H., Nakagawa, T., Bando, H., (2001) Physica C, 361, p. 244Kopelevich, Y., Esquinazi, P., (1998) J. Low Temp. Phys., 113, p. 1Esquinazi, P., Setzer, A., Fuchs, D., Kopelevich, Y., Zeldov, E., Assmann, C., (1999) Phys. Rev. B, 60, p. 12454Gurevich, A., Vinokur, V.M., (1999) Phys. Rev. Lett., 83, p. 3037Cai, X.Y., Gurevich, A., Larbalestier, D.C., Kelley, R.J., Onellion, M., Berger, H., Margaritondo, G., (1994) Phys. Rev. B, 50, p. 16774Passos, W.A.C., Lisboa-Filho, P.N., Caparroz, R., De Faria, C.C., Venturini, P.C., Araujo-Moreira, F.M., Sergeenkov, S., Ortiz, W.A., (2001) Physica C, 354, p. 189(1991) Magnetic Susceptibility of Superconductors and Other Spin Systems, , edited by R. A. Hein, T. L. Francavilla, D. H. Liebenberg (Plenum, New York)Clem, J.R., Kerchner, H.R., Sekula, S.T., (1976) Phys. Rev. B, 14, p. 1893Ji, L., Sohn, H.R., Spalding, G.C., Lobb, C.J., Tinkham, M., (1989) Phys. Rev. B, 40, p. 10936Brandt, E.H., (1998) Phys. Rev. B, 58, p. 6506Brandt, E.H., (1998) Phys. Rev. B, 58, p. 6523De Lima, O.F., Cardoso, C.A., (2000) Phys. Rev. B, 61, p. 11722Cardoso, C.A., De Lima, O.F., (2000) Physica C, 334, p. 185Cardoso, C.A., Avila, M.A., Ribeiro, R.A., De Lima, O.F., (2001) Physica C, 354, p. 165Worthington, T.K., Gallagher, W.J., Dinger, T.R., (1987) Phys. Rev. Lett., 59, p. 1160Welp, U., Fleshler, S., Kwok, W.K., Klemm, R.A., Vinokur, V.M., Downey, J., Veal, B., Crabtree, G.W., (1991) Phys. Rev. Lett., 67, p. 3180Klein, L., Yacoby, E.R., Yeshurun, Y., Erb, A., Müller-Vogt, G., Breit, V., Wühl, H., (1994) Phys. Rev. B, 49, p. 4403Mochida, T., Murakami, M., (1997) Physica C, 290, p. 311Fàbrega, L., Fontcuberta, J., Civale, L., Piñol, S., (1994) Phys. Rev. B, 50, p. 1199Jönsson, B.J., Rao, K.V., Yun, S.H., Karlsson, U.O., (1998) Phys. Rev. B, 58, p. 5862Fàbrega, L., Fontcuberta, J., Piñol, S., Van Der Beek, C.J., Kes, P.H., (1993) Phys. Rev. B, 47, p. 15250Zeldov, E., Amer, N.M., Koren, G., Gupta, A., McElfresh, M.W., Gambino, R.J., (1990) Appl. Phys. Lett., 56, p. 680Hardy, V., Wahl, A., Ruyter, A., Maignan, A., Martin, C., Coudrier, L., Provost, J., Simon, Ch., (1994) Physica C, 232, p. 347Pashitski, A.E., (1997) Science, 275, p. 36
Specific Heat At High Temperature And Magnetic Measurements In Nd 0.5sr0.5mno3 And R0.5ca 0.5mno3 (r = Nd, Sm, Dy And Ho) Samples
No full textWe have made a magnetic and specific heat characterization of five manganese samples. Ferromagnetic, antiferromagnetic and charge ordering transitions in our samples agree with previous reports. Each specific heat curve was successfully fitted at high temperatures by an Einstein model with three optical phonon modes. Close to the charge ordering and ferromagnetic transition temperatures the specific heat curves showed peaks superposed to the characteristic response of the lattice oscillations. © 2003 Elsevier B.V. All rights reserved.3691-2227230Radaelli, P.G., Cox, D.E., Marezio, M., Cheong, S.-W., (1997) Phys. Rev. B, 55 (5), p. 3015Zhao, G.-M., Ghosh, K., Greene, R.L., (1998) J. Phys. Condens. Matter, 10, p. 737Moritomo, Y., (1999) Phys. Rev. B, 60 (14), p. 10374Xiao, G., Gong, G.Q., Canedy, C.L., McNiff Jr., E.J., Gupta, A., (1997) J. Appl. Phys., 81 (8), p. 5324Mori, S., Chen, C.H., Cheong, S.-W., (1998) Nature, 392, p. 473López, J., Lisboa-Filho, P.N., Passos, W.A.C., Ortiz, W.A., Araujo-Moreira, F.M., (2001) J. Magn. Magn. Mater., 226-230, pp. 507-508López, J., Lisboa Filho, P.N., Passos, W.A.C., Ortiz, W.A., Araujo-Moreira, F.M., Ghosh, K., De Lima, O.F., Schaniel, D., (2001) Phys. Rev. B, 63 (22), p. 224422Lisboa Filho, P.N., Zanetti, S.M., Leite, E.R., Ortiz, W.A., (1999) Mater. Lett., 38 (4), p. 289Kajimoto, R., Yoshizawa, H., Kawano, H., Kuwahara, H., Tokura, Y., Ohoyama, K., Ohashi, M., (1999) Phys. Rev. B, 60 (13), p. 9506Millange, F., De Brion, S., Chouteau, G., (2000) Phys. Rev. B, 62 (9), p. 5619Tokura, Y., Tomioka, Y., (1999) J. Magn. Magn. Mater., 200, p. 1Terai, T., Sasaki, T., Kakeshita, T., Fukuda, T., Saburi, T., Kitagawa, H., Kindo, K., Honda, M., (2001) Phys. Rev. B, 61 (5), p. 3488Ramirez, A.P., Schiffer, P., Cheong, S.-W., Chen, C.H., Bao, W., Palstra, T.T.M., Gammel, P.L., Zegarski, B., (1996) Phys. Rev. Lett., 76 (17), p. 3188Raychaudhuri, A.K., Guha, A., Das, I., Rawat, R., Rao, C.N.R., (2001) Phys. Rev. B, 64 (16), p. 16511
The Vortex Decoupling Transition In Bi2212 Crystals With Columnar Defects
No full textTwo Bi2Sr2CaCu2O8+δ single crystals were characterized, before and after irradiation with 200 MeV Ag ions under fluence of 5 × 1010 ions/cm2. Columnar defects were produced along the c-axis direction in one crystal, and in a direction tilted by an angle of 30° with respect to the c-axis for the other crystal. The 3D-2D vortex decoupling lines were significantly shifted to higher temperatures, after irradiation of the crystals, for magnetic fields smaller than the matching value BΦ ≈ 1 T. For B > 3 T the decoupling lines for the irradiated crystals tend smoothly to the same behavior observed in the original crystals, up to the maximum probed field of 5 T. Interestingly the vortex pinning by columnar defects was found to be almost independent of the applied magnetic field direction, as revealed by the width of magnetization loops. © 2005 Elsevier B.V. All rights reserved.437-438SPEC. ISS.6164Civale, L., Marwick, A.D., Worthington, T.K., Kirk, M.A., Thompson, J.R., Krusin-Elbaum, L., Sun, Y., Holtzberg, F., (1991) Phys. Rev. Lett., 67, p. 648Konczykowski, M., Rullier-Albenque, F., Yacoby, E.R., Shaulov, A., Yeshurun, Y., Lejay, P., (1991) Phys. Rev. B, 44, p. 7167Blatter, G., Feigel'man, M.V., Geshkenbein, V.B., Larkin, A.I., Vinokur, V.M., (1994) Rev. Mod. Phys., 66, p. 1125Avila, M.A., Civale, L., Silhanek, A.V., Ribeiro, R.A., de Lima, O.F., Lanza, H., (2001) Phys. Rev. B, 64, p. 144502Nelson, D.R., Vinokur, V.M., (1992) Phys. Rev. Lett., 68, p. 2398Krusin-Elbaum, L., Civale, L., Blatter, G., Marwick, A.D., Holtzberg, F., Field, C., (1994) Phys. Rev. Lett., 72, p. 1914van der Beek, C.J., Konczykowski, M., Vinokur, V.M., Crabtree, G.W., (1995) Phys. Rev. B, 51, p. 15492Koshelev, A.E., Le Doussal, P., Vinokur, V.M., (1996) Phys. Rev. B, 53, p. 8855Glazman, L.I., Koshelev, A.E., (1991) Phys. Rev. B, 43, p. 2835Banerjee, S.S., Soibel, A., Myasoedov, Y., Rappaport, M., Zeldov, E., Menghini, M., Fasano, Y., Tamegai, T., (2003) Phys. Rev. Lett., 90, p. 087004Banerjee, S.S., Goldberg, S., Soibel, A., Myasoedov, Y., Rappaport, M., Zeldov, E., de la Cruz, F., Vinokur, V.M., (2004) Phys. Rev. Lett., 93, p. 097002de Lima, O.F., Awana, V.P.S., Ribeiro, R.A., Avila, M.A., (2000) Europhys. Lett., 51, p. 174de Almeida, R.L., de Lima, O.F., (2004) Physica C, 408-410, p. 512Thompson, J.R., Sun, Y.R., Kerchner, H.R., Christen, D.K., Sales, B.C., Chakoumakos, B.C., Marwick, A.D., Civale, L., (1992) Appl. Phys. Lett., 60, p. 230
Magnetic Field Dependence Of The Curie-weiss Paramagnetism In Crv Alloys
Full text linkThe determination of the magnetic properties of antiferromagnetic Cr alloys requires careful consideration of the influence of the applied magnetic field. In this work we show that alloys of Cr-x at. % V present a Curie-Weiss paramagnetism above the Néel temperature, which is suppressed by a characteristic field HL. Samples with x=0.1, 0.2, and 0.4 were investigated through measurements of the magnetic susceptibility as a function of temperature, for different values of the magnetic field. A magnetic phase diagram showing the characteristic line HL vs x at. % V is proposed. © 1997 American Institute of Physics.818 PART 2A42094211Suzuki, T., Takaki, H., (1964) J. Phys. Soc. Jpn., 19, p. 1241Suzuki, T., (1966) J. Phys. Soc. Jpn., 21, p. 442Aidun, R., Arajs, S., Moyer, C.A., (1985) Phys. Status Solidi B, 128, p. 133Hill, P., Ali, N., De Oliviera, A.J.A., Ortiz, W.A., De Camargo, P.C., Fawcett, E., (1994) J. Phys. Condens. Matter., 6, p. 1761De Oliveira, A.J.A., Otriz, W.A., De Camargo, P.C., Galkin, V.Yu., (1996) J. Magn. Magn. Mater., 152, p. 86De Oliveira, A.J.A., De Lima, O.F., De Camargo, P.C., Ortiz, W.A., Fawcett, E., (1996) J. Phys. Condens. Matter., 8, pp. L403Benediktsson, G., Hedman, L., Aström, H.U., Rao, K.V., (1982) J. Phys. F, 12, p. 1439Booth, J.G., (1964) Phys. Status Solidi, 7 K, p. 157Bender, D., Müller, J., (1970) Phys. Kondens. Mater., 10, p. 342Buzdin, A.I., Men'shov, V.N., Tugushev, V.V., (1986) Zh. Eksp. Teor. Fiz., 91, p. 2204(1986) Sov. Phys. JETP, 64. , Engl. TranslTugushev, V.V., (1992) Modulated and Localized Structures of the Spin-Density Wave in Itinerant Antiferromagnets in Electronic Phase Transitions, p. 237. , edited by W. Hanke and Yu. Koapev Elsevier, AmsterdamDe Oliveira, A.J.A., De Lima, O.F., Ortiz, W.A., De Camargo, P.C., (1995) Solid State Commun., 96, p. 383De Oliveira, A.J.A., (1996), PhD. thesis, Universidade Federal de São Carlo
Critical Current Study Using Ac Susceptibility Measurements In Er Ba2cu3o7-δ Crystal Showing The Fishtail Effect
No full textDifferent χac measurements can be collapsed into a single curve if plotted against the ac penetration depth δ = h/Jd. Further, using this scaling law, it is possible to obtain the frequency dependence of the shielding current density J(ν, B, T). In this work, this scaling relation was tested for a Er Ba2Ou3O7-δ single crystal. The frequency dependence of J(ν, B, T) displays a behavior closely related with the second magnetization peak ("fishtail effect") observed in M × H curves. This result supports a dynamical interpretation for the fihtail effect. © 2000 Elsevier Science B.V. All rights reserved.341-348PART 312911292Bean, C.P., (1964) Rev. Mod. Phys., 36, p. 31De Lima, O.F., Cardoso, C.A., Phys. Rev. B.Fàbrega, L., (1994) Phys. Rev. B, 50, p. 1199Zeldov, E., (1990) Appl. Phys. Lett., 56, p. 680Brandt, E.H., (1998) Phys. Rev. B, 58, p. 6006Brandt, E.H., (1998) Phys. Rev. B, 58, p. 6523Cardoso, C.A., De Lima, O.F., (1999) Bull Amer. Phys. Soc., 44 (1), p. 1283Yeshurun, Y., (1994) Phys. Rev. B, 49, p. 154
Multilevel Granular Structure And Its Coupling Distribution In Melt-textured Yba2cu3o7-δ
No full textWe have performed AC magnetic susceptibility measurements as a function of the excitation magnetic field, h, for two YBa2Cu3O7-δ polycrystalline samples using a high-sensitivity home-made susceptometer, for fixed values of the temperature, T, and the external DC magnetic field, H. One of the samples is melt-textured and for H < 52.5 Oe it presents features that can be associated with a multilevel granular structure. Using an effective medium model, we have determined the critical current density distribution associated with the multilevel granular structure. The average critical current density in each intergranular region was then calculated by applying Bean's critical state model. © 1999 Elsevier Science B.V. All rights reserved.3111-298106Clem, J.R., (1988) Physica C, 153-155, p. 50Tinkham, M., Lobb, C.J., (1991) Solid State Physics, 42-91. , H. Ehrenr, F. Seitz, D. Turnbull (Eds.), Academic Press, New YorkMüller, K.H., (1989) Physica C, 159, p. 717Dersch, H., Blatter, G., (1988) Phys. Rev. B, 38, p. 11391Ferdeghini, C., Giannini, E., Grassano, G., Marré, D., Pallecchi, I., Siri, A.S., (1998) Physica C, 294, p. 233Widder, W., Bauernfeind, L., Braun, H.F., Burkhardt, H., Rainer, D., Bauer, M., Kinder, H., (1997) Phys. Rev. B, 55, p. 1254Kim, G.C., Kim, Y.C., (1997) Physica C, 279, p. 122Cherkasov, A.N., Volkova, L.P., (1996) Low Temp. Phys., 22, p. 996Jin, S., Tiefel, T.H., Sherwood, R.C., Davis, M.E., Van Dover, R.V., Kammlott, G.W., Fastnacht, R.A., Keith, H.D., (1988) Appl. Phys. Lett., 52, p. 2074Murakami, M., Morita, M., Doi, K., Miyamoto, K., (1989) Jpn. J. Appl. Phys., 28, p. 1189Salama, K., Selvamanickam, V., Gao, L., Sun, K., (1989) Appl. Phys. Lett., 54, p. 2352Ren, H.T., He, Q., Xiao, L., Wang, R.K., Yu, D.A., (1990) Cryogenics, 30, p. 837McGinn, P.J., Chen, W., Zhu, N., Balachandran, U., Lanagan, M.T., (1990) Physica C, 165, p. 480Murakami, M., Morita, M., Doi, K., Miyamoto, K., Hamada, H., (1989) Jpn. J. Appl. Phys., 28, pp. L399Ulrich, M., Muller, D., Heinemann, K., Niel, L., Freyhardt, H.C., (1992) Physica C, 198, p. 181Ulrich, M., Muller, D., Heinemann, K., Niel, L., Freyhardt, H.C., (1993) IEEE Trans. Appl. Supercond., 3, p. 1386Blatter, G., Feigelman, M.V., Geshkenbein, V.B., Larkin, A.I., Vinokur, V.M., (1994) Rev. Mod. Phys., 66, p. 1125Crabtree, G.W., Liu, J.Z., Umwzawa, A., Kwok, W.K., Sowers, C.H., Malik, S.K., Veal, B.W., Downey, J.W., (1987) Phys. Rev. B, 36, p. 4021Zhukov, A.A., Gladyshev, I.V., Gordeev, S.N., Murashov, V.A., (1991) Supercond. Phys. Chem. Technol., 4, p. 1268Dorosinskii, L.A., Nikitenko, V.I., Polyanskii, A.A., Vlasko-Vlasov, V.K., (1994) Physica C, 219, p. 81Swartzendruber, L.J., Roitburd, A., Kaiser, D.L., Gayle, F.W., Bennet, L.H., (1990) Phys. Rev. Lett., 64, p. 483Turchinkaya, M., Kaiser, D.L., Gayle, F.W., Shapiro, A.J., Roitburd, A.L., Poilyanskii, A.A., Vlasko-Vlasov, V.V., Nikitenko, V.I., (1993) Physica C, 216, p. 205Chen, D.X., Nogues, J., Rao, K.V., (1989) Cryogenics, 29, p. 800Müller, K.H., (1990) Physica C, 168, p. 585Müller, K.H., (1989) Physica C, 159, p. 717Choy, T.C., Stoneham, A.M., (1990) J. Phys. Condens. Mat., 2, p. 939Schilling, O.F., Aiihara, K., Soeta, A., Kamo, T., Matsuda, S., (1993) Phys. Rev. B, 47, p. 8096Bean, C.P., (1964) Rev. Mod. Phys., 36, p. 31Araujo-Moreira, F.M., Ortiz, W.A., De Lima, O.F., (1994) Physica C, 235-240, p. 3205Araujo-Moreira, F.M., Ortiz, W.A., De Lima, O.F., (1996) J. Appl. Phys., 80, p. 3390Hein, R.A., Francavilla, T.L., Liebenberg, D.H., (1992) Magnetic Susceptibility of Superconductors and Other Spin Systems, , Plenum, New YorkAraújo-Moreira, P.M., Barbara, P., Cawthorne, A.B., Lobb, C.J., (1997) Phys. Rev. Lett., 78, p. 4625Gelfuso, V., Ortiz, W.A., unpublishedSenoussi, S., (1992) J. Phys. III France, 2, p. 1041Chen, D.X., Sanchez, A., (1991) J. Appl. Phys., 70, p. 546
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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