94 research outputs found
Shear transformations and the relaxation of the magnetic aftereffect in amorphous ferromagnets
No full textQuenched-in Stresses In Amorphous Ribbons
No full textA set of four samples of the composition Fe73.5Cu1Nb3Si13.5B9 produced with different quenching rates was investigated in the amorphous state. In addition to disaccommodation experiments, the stress dependences of the coercivity and of the pinning field were also determined. The stress dependence of the coercivity was fitted using a pinning model. These data show the effects of anisotropy fluctuations as well as of the surface roughness. © 1994.1331-32023Yoshizawa, Oguma, Yamauchi, (1988) J. Appl. Phys., 64, p. 6044Herzer, Grain structure and magnetism of nanocrystalline ferromagnets (1989) IEEE Transactions on Magnetics, p. 3327Schäfer, Hubert, Herzer, Domain observation on nanocrystalline material (1991) Journal of Applied Physics, 69, p. 5325Ch. Polak, M. Knobel, R. Grössinger and R. Sato Turtelli, J. Magn. Magn. Mater., to be publishedAllia, Luborsky, Soardo, Sato Turtelli, Vinai, Magnetic relaxation in amorphous ribbons prepared with different quenching rates (1981) IEEE Transactions on Magnetics, p. 2615Polak, Grössinger, Holubar, Knobel, Sato Turtelli, Sassik, (1993) Key Engineering Materials, 81-83, p. 239. , P. Duhaj, P. Mrafko, P. SvecPolak, Grössinger, Sinnecker, Knobel, Turtelli, Kuβ, (1993) Proc. MEA, , CapriTakayama, Oi, (1979) J. Appl. Phys., 50, p. 4962J.P. Sinnecker, R. Sato Turtelli, M. Knobel and J.F. Saenger, Proc. EMMA '93, KosicePolak, (1992) Thesis, , University of ViennaKnobel, Sinnecker, Turtelli, Rechenberg, Grössinger, (1993) J. Appl. Phys., 73, p. 6603Allia, Viani, (1982) Phys. Rev. B, 26, p. 6141Luborsky, (1983) Amorphous Metallic Alloys, p. 311. , Butterworths, Londo
Domain Structure Dynamics Of Amorphous Fe64co21b 15 And Co77b23 Ribbons Studied By Three-dimensional Neutron Depolarization
No full textRelaxation phenomena related to domain structure dynamics in amorphous ferromagnetic Fe64Co21B15, and Co 77B23 samples were studied by time-resolved three-dimensional neutron depolarization and a conventional magnetic induction technique. Different initial domain structures were induced either by applying external stresses or by stress annealing. A theoretical model was developed to describe the observed time dependence of neutron depolarization upon passage through such samples. It is shown that the domain structure approaches the equilibrium state with stable domain wall positions at a rate that depends essentially both on the sample composition and on the induced magnetic anisotropy. © 1999 American Institute of Physics.85210431049Sato Turtelli, R., Vinai, F., (1990) Rev. Bras. Fis., 20, p. 203Allia, P., Beatrice, C., Mazzeti, P., Vinai, F., (1986) J. Magn. Magn. Mater., 54-57, p. 273Allia, P., Vinai, F., (1986) Phys. Rev. B, 33, p. 422Kronmüller, H., (1983) Philos. Mag. B, 48, p. 127Allia, P., Beatrice, C., Mazzetti, P., Vinai, F., (1987) Appl. Phys. Lett., 51, p. 142Allia, P., Vinai, F., (1990) Philos. Mag. B, 61 (4), p. 763Drabkin, G.M., Zabidarov, E.I., Kasman, Ya.A., Okorokov, A.I., (1969) J. Exp. Theor. Phys., 29, p. 261Veider, A., Badurek, G., Grössinger, R., Kronmüller, H., (1986) J. Magn. Magn. Mater., 60, p. 182De Jong, M., Köszegi, L., Sietsma, J., Rekveldt, M.Th., Van Den Beukel, A., (1996) J. Magn. Magn. Mater., 152, p. 326Sinnecker, J.P., Sato Turtelli, R., Grössinger, R., Riedler, P., Badurek, G., (1995) Nanostructured and Non-Crystalline Materials, 1, p. 562. , edited by M. Vázquez and A. HernandoSinnecker, J.P., Badurek, G., Grössinger, R., Riedler, P., Sato Turtelli, R., (1995) J. Magn. Magn. Mater., 140-144, p. 331Maleev, S.V., Ruban, V.A., (1972) Sov. Phys. JETP, 35, p. 222Rosman, R., Rekveldt, M.Th., (1990) Z. Phys. B, 79, p. 61Rekveldt, M.Th., (1973) Z. Phys., 259, p. 391Hochhold, M., Leeb, H., Badurek, G., (1996) J. Phys. Soc. Jpn., 65 (SUPPL. A), p. 292Badurek, G., (1981) Nucl. Instrum. Methods, 189, p. 543Polak, Ch., Sinnecker, J.P., Grössinger, R., Knobel, M., Sato Turtelli, R., (1993) J. Appl. Phys., 73, p. 5272(1995) 1st-Year Progress Report of PECO-COPERNICUS Programme, p. 49. , Contract: CIPA-CT93-0239Kronmüller, H., (1981) At. Energ. Rev. Suppl., 1, p. 25
Low-temperature Behavior of the Magnetic-permeability Aftereffect In Amorphous Ferromagnetic-alloys
No full text23512542254
Free-volume Dependence of the Electrical-resistivity of Metallic Glasses Prepared With Different Quenching Rates
No full textInflurnce of structural relaxation on the magnetic permeability aftereffect of amorphous ferromagnetic alloys
No full textStructural Relaxation In Amorphous Metallic Alloys Investigated By Electrical-resistivity Measurements
No full textInitial Magnetic Permeability During The Development Of The Nanocrystalline State In Amorphous Ribbons
No full textLow-field initial permeability (μi) has been measured at several steps of nanocrystallization in four amorphous Fe73.5Cu1Nb3Si13.5B9 ribbons produced by planar flow casting with different quenching rates (QRs) from the melt. It is observed that the increase in μi upon nanocrystallization is strongly influenced by the initial free-volume content of each sample. Samples produced with higher quenching rates exhibit a faster transformation kinetics and stronger enhancement of the initial permeability in the nanocrystalline state. Conventional heat treatments and accumulative annealings were performed on all the ribbons, in order to study the effect of their inhomogeneities and induced anisotropies. © 1994.1331-3255258Yoshizawa, Oguma, Yamauchi, (1988) J. Appl. Phys., 64, p. 6044Knobel, Turtelli, Rechenberg, (1992) J. Appl. Phys., 71, p. 6008Köster, Herold, Glassy Metals I: Ionic Structure (1981) Electronic Transport and Crystallization, p. 254. , H.J. Güntherodt, H. Becker, Springer-Verlag, BerlinKnobel, Sinnecker, Saenger, Turtelli, Effect of as-cast topological disorder on the magnetic properties of nanocrystalline Fe73.5Cu1Nb3Si13.5.B9 (1993) Philosophical Magazine Part B, 68, p. 861C. Polak, M. Knobel, R. Grössinger and R. Sato Turtelli, J. Magn. Magn. Mater. (to appear)P. Allia, M. Baricco, M. Knobel, P. Tiberto and F. Vinai, IEEE Trans. Magn. (in press)Knobel, Sinnecker, Turtelli, Rechenberg, Grössinger, (1993) J. Appl. Phys., 73, p. 6603Knobel, Santos, Torriani, Turtelli, (1993) Nanostr. Mater., 2, p. 399Luborsky, (1983) Amorphous Metallic Alloys, p. 360. , F.E. Luborsky, Butterworths, Londo
Investigation of time dependent effects in the magnetization processes of YxSm(1-x)Co3Cu2 alloys
No full textThe Development Of Nanocrystalline Fe73.5cu1nb3si13.5b9: Magnetism And Structural Disorder
No full textIn order to study the effect of the initial degree of topological disorder on the formation of the nanocrystalline state, two amorphous ribbons of composition Fe73.5Cu1Nb3Si13.5B9 produced in different laboratories were investigated. Measurements of hysteresis loops, disaccommodation and magnetostriction were performed on as-cast and nanocrystalline samples. An analytically solvable model describing the stress dependence of the coecivity is discussed. Two types of analysis of the approach to saturation are used to estimate the distribution function of the magnetization vectors. From the pinning field, the dimension of long-range order stresses in the nanocrystalline state is deduced. © 1994.1341112Yoshizawa, Oguma, Yamauchi, (1988) J. Appl. Phys., 64, p. 6044Herzer, (1992) J. Magn. Magn. Mater., 112, p. 258Gleiter, Nanocrystalline materials (1989) Progress in Materials Science, 33 (4)Herzer, (1989) IEEE Trans. Magn., 25, p. 3327Knobel, Sato Turtelli, Rechenberg, (1992) J. Appl. Phys., 71, p. 6008Schäfer, Hubert, Herzer, Domain observation on nanocrystalline material (1991) Journal of Applied Physics, 69, p. 5325Grössinger, Wazulek, Sassik, The influence of the magnetostriction on the coercivity of amorphous ribbons (1990) Journal of Magnetism and Magnetic Materials, 83, p. 351Kersten, (1943) Z. Phys., 44, p. 63Allia, Luborsky, Soardo, Sato Turtelli, Vinai, Magnetic relaxation in amorphous ribbons prepared with different quenching rates (1981) IEEE Transactions on Magnetics, 17, p. 2615Sato Turtelli, Vinai, (1990) Rev. Bras. Fis., 20, p. 203Narita, Yamasaki, Fukunaga, (1980) IEEE Trans. Magn., 16, p. 435Allia, Vinai, (1982) Phys. Rev. B, 26, p. 6141Allia, Vinai, (1986) Phys. Rev. B, 33, p. 422Allia, Vinai, (1981) IEEE Trans. Magn., 17, p. 1481Kronmüller, Theory of magnetic after-effects in ferromagnetic amorphous alloys (1983) Philosophical Magazine Part B, 48, p. 127Kronmüller, Moser, Rettenmeier, Micromagnetic analysis of magnetic after-effects in amorphous alloys by two-level systems (1984) IEEE Transactions on Magnetics, 20, p. 1388Kronmüller, (1981) Atomic Energy Rev. Suppl., 1, p. 255Vazquez, Fernengel, Kronmüller, (1989) Phys. Stat. Solidi (a), 115, p. 547J. Gonzales, M. Vazquez, E. T. de Lacheisserie and G. Herzer, unpublishedPolak, Grössinger, Holubar, Knobel, Sato Turtelli, Sassik, Determination of the Quenched-In State of Amorphous Ribbons Applying the Law of Approach to Saturation (1993) Key Engineering Materials, 81-83, p. 239Stoner, Wohlfarth, A Mechanism of Magnetic Hysteresis in Heterogeneous Alloys (1948) Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 240 A, p. 599Zhao-Hua, Dao-Sheng, (1981) J. Appl. Phys., 52, p. 1923Allia, Beatrice, Vinai, Knobel, Sato Turtelli, (1991) Appl. Phys. Lett., 59, p. 245
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