1,720,980 research outputs found
Influence Of Particle Size Distribution On Magnetic Properties Of Nanocrystalline Soft Magnetic Fe86zr7cu1b6
No full textThe effect of particle size distribution on the magnetic properties of nanocrystalline Fe86Zr7Cu1B6 samples is studied in detail. The analysis applies a realistic particle size distribution, obtained from transmission electron microscopy images, to the recently developed extended Random Anisotropy Model. The effect of a broad size distribution is found to be more relevant when the tail of the distribution is larger than 20 nm.365 I34303432Yoshizawa, Y., Oguma, S., Yamamuci, K., (1988) J. Appl. Phys., 64, p. 6044Suzuki, K., Makino, A., Inoue, A., Masumoto, T., (1991) J. Appl. Phys., 70, p. 6232Herzer, G., (1989) IEEE Trans. Magn., 25, p. 3327(1990) IEEE Trans. Magn., 26, p. 1397(1995) Scripta Metal. Mater., 33, p. 1741Ślawska-Waniewska, A., Gutowski, M., Lachowicz, H.K., (1992) Phys. Rev. B, 46, p. 14594Hernando, A., Kulik, T., (1994) Phys. Rev. B, 49, p. 7064Da Silva, F.C.S., Ferrari, E.F., Knobel, M., (1998) J. Appl. Phys., 84, p. 5366Barandiarán, J.M., Fernéndez Barquín, L., Gómez Sal, J.C., Gorría, P., Hernando, A., (1993) Sol. Stat. Comm., 88, p. 75Ferrari, E.F., Da Silva, F.C.S., Knobel, M., (1997) Phys. Rev. B, 56, p. 6086Hernando, A., Marín, P., Vázquez, M., Barandiarán, J.M., Herzer, G., (1998) Phys. Rev. B, 58, p. 366García-Otero, J., García-Bastida, A.J., Rivas, J., (1998) J. Magn., Magn. Mater., 189, p. 377Ferrari, E.F., Nunes, W.C., Novak, M.A., (1999) J. Appl. Phys., 86, p. 301
Development Of Granular Structure In Cu90co10 Ribbons Through Furnace And Current Annealing
No full textOn-line measurements of resistance and temperature in melt-spun Cu90 Co10 ribbons are made using two different annealing techniques: conventional furnace annealing, and linearly varying current Joule heating. The aim of this paper is to consider the electrical current, flowing through the sample during the annealing, as a possible parameter to control thermal treatment parameters and thus the microstructure of these systems. Although an exact way to obtain the temperature from the annealing current remains a difficult task, the on-line changes in resistance with current allows one to identify structural changes in the sample during annealing. Also, because the temperature is found to increase continuously with electrical current, it is possible to calibrate the Joule heating system to precisely determine the annealing temperature.365 I30413043Allia, P., Baricco, M., Tiberto, P., Vinai, F., (1993) Rev. Sci. Instr., 64, p. 1053Da Silva, F.C.S., Ferrari, E.F., Knobel, M., (1998) J. Appl. Phys., 84, p. 5366Allia, P., Knobel, M., Tiberto, P., Vinai, F., (1994) J. Magn. Magn. Mater., 133, p. 243Knobel, M., Allia, P., Gomez-Polo, C., Chiriac, H., Vzquez, M., (1995) J. Phys. D: Appl. Phys., 28, p. 2398. , and references thereinYu, R.H., Zhang, X.X., Tejada, J., Zhu, J., Knobel, M., Tiberto, P., Allia, P., Vinai, F., (1995) J. Appl. Phys., 78, p. 5062Allia, P., Baricco, M., Tiberto, P., Vinai, F., (1993) Phys. Rev. B, 47, p. 3118Allia, P., Baricco, M., Knobel, M., Tiberto, P., Vinai, F., (1994) Mater. Sci. Eng. A, 179-180, p. 361Da Silva, F.C.S., Ferrari, E.F., Knobel, M., (1999) J. Appl. Phys., 86, p. 7170Ferrari, E.F., Da Silva, F.C.S., Knobel, M., (1997) Phys. Rev. B, 56, p. 6086Miranda, M.G.M., Rodriguez, G.J.B., Antunes, A.B., Baibich, M.N., Ferrari, E.F., Da Silva, F.C.S., Knobel, M., (1998) J. Magn. Magn. Mater., 185, p. 33
Magneto-transport In Granular Ribbons At High Magnetic Fields
No full textWe have measured the bulk and surface magnetization and magnetoresistance of granular Co10Cu90 ribbons treated with isochronous anneals, from helium to room temperature and at high magnetic fields. The magnetoresistance of these materials can be larger than 15% at room temperature and at high magnetic fields. We show that interparticle interactions are needed for a complete description of the experimental results.1964547Levy, P.M., (1995) J. Magn. Magn. Mater., 140-144, p. 485Altbir, D., Vargas, P., D'Albuqerque E Castro, J., (1996) Phys. Rev. B, 10, p. 6823Ferrari, E.F., Da Silva, F.C.S., Knobel, M., (1997) Phys. Rev. B, 56, p. 6086Miranda, M.G.M., Bracho Rodriguez, G.J., Antunes, A.B., Baibich, M.N., Ferrari, E.F., Da Silva, F.C.S., Knobel, M., (1998) J. Magn. Magn. Mater., 185, p. 331Takanashi, H., Park, J., Sugawara, T., Hono, K., Goto, A., Yasuoka, H., Fujimori, H., (1996) Thin Solid Films, 275, p. 106Allia, P., Knobel, M., Tiberto, P., Vinai, F., (1995) Phys. Rev. B, 52, p. 15398Vargas, P., Altbir, D., D'Albuqerque E Castro, J., Raff, U., (1997) J. Phys. Condens. Matter, 9, p. 9931Knobel, M., Ferrari, E.F., Da Silva, F.C.S., (1998) Proc. IV Latin American Workshop on Magnetism, Magnetic Materials and Their Applications, , São Paulo, Brazil, June World Scientific, Singapore, to be publishedChien, C.L., (1995) Ann. Rev. Mater. Sci., 25, p. 12
Controlled Crystallization Of Metallic Glasses Through Joule Heating
No full textThis work reviews the basic aspects of an alternative thermal treatment of metallic glasses by Joule heating, which explores the heat produced by an electrical current flowing through samples. The advantages of this annealing method are discussed, and a brief description of available models in a variety of materials is given. The experimental procedures are discussed in detail, with emphasis in a new variant of Joule heating, known as "linear varying current Joule heating". This method allows one to precisely monitor the structural transformations that take place during annealing, by interrupting the thermal treatment at any desired point, leading to samples with controlled micro and/or nanostructures. Some examples of Joule heating curves in novel bulk amorphous samples are shown, to illustrate the excellent perspectives of this annealing technique.644L5.3.1L5.3.12Herzer, G., Hilzinger, H.R., (1986) J. Magn. Magn. Mater., 62, p. 143Suzuki, K., Makino, A., Inoue, A., Masumoto, T., (1991) J. Appl. Phys., 70, p. 6232Yoshizawa, Y., Oguma, S., Yamaguchi, K., (1988) J. Appl. Phys., 64, p. 6044Allia, P., Baricco, M., Knobel, M., Tiberto, P., Vinai, F., (1994) J. Magn. Magn. Mater., 133 (1-3), p. 243Allia, P., Tiberto, P., Baricco, M., Vinai, F., (1993) Rev. Sci. Inst., 64 (4)Jagielinsky, T., (1983) IEEE Trans. Magn., 19, p. 564Vázquez, M., Gonzáles, J., Hernando, A., (1986) J. Magn. Magn. Mater., 53, p. 323Yavari, A.R., Barrue, R., Harmelin, M., Perron, J.C., (1987) J. Magn. Magn. Mater., 69, p. 43Escobar, M.A., Yavari, A.R., Barrue, R., Perron, J.C., (1992) IEEE Trans. Magn., 28, p. 1911Mitra, A., Vázquez, M., Hernando, A., Gómez-Polo, C., (1990) IEEE Trans. Magn., 26, p. 1415Kraus, L., Knobel, M., Kane, S.N., Chiriac, H., (1999) J. Appl. Phys., 85 (8), p. 5435Yu, R.H., Zhang, X.X., Tejada, J., Knobel, M., Tiberto, P., Allia, P., Vinai, F., (1996) Z. Phys. B, 99 (2), p. 159Allia, P., Baricco, M., Tiberto, P., Vinai, F., (1993) Phys. Rev. B, 47, p. 3118Da Silva, F.C.S., Ferrari, E.F., Knobel, M., Denardin, J., Baibich, M.N., Miranda, M.G.M., (2000) IEEE Trans. Magn., , (in press)Allia, P., Baricco, M., Beatrice, C., Knobel, M., Tiberto, P., Vinai, F., (1995) Mater. Sci. Forum, 179-181, p. 575Da Silva, F.C.S., Ferrari, E.F., Knobel, M., (1999) J. Appl. Phys., 86 (12), p. 7170Allia, P., Baricco, M., Knobel, M., Tiberto, P., Vinai, F., (1994) Mater. Sci. Eng. A, 179, p. 361Knobel, M., Allia, P., Gómez-Polo, C., Chiriac, H., Vazquez, M., (1995) J. Phys. D: Appl. Phys., 28 (12), p. 2398Chiriac, H., Knobel, M., Óvári, T.A., (1999) Mater. Sci. Forum, 302-303, p. 239Da Silva, F.C.S., PhD Thesis, UNICAMP - Brazil, 14-6-2000Chiriac, H., Óvári, T.A., (1996) Progr. Mater. Sci., 40, p. 333Da Silva, F.C.S., Ferrari, E.F., Knobel, M., (1998) J. Appl. Phys., 84 (9), p. 5366Da Silva, F.C.S., Ferrari, E.F., Knobel, M., Dos Santos, D.R., Torriani, I.L., (2000) Appl. Phys. Lett., 77 (9), p. 1375Dos Santos, D.R., Torriani, I.L., Silva, F.C.S., Knobel, M., (2000) J. Appl. Cryst., 33 (1), p. 473Inoue, A., Zhang, T., Masumoto, T., (1993) J. Non-Cryst. Solids, 156-158, p. 473Zhang, T., Inoue, A., Masumoto, T., (1991) Mater. Trans. JIM, 32, p. 1005Inoue, A., (1999) Bulk Amorphous Alloys - Preparation and Fundamental Characteristics, 4. , (Trans Tech, Zürich, Switzerland)Mattern, N., Kühn, U., Neuefeind, J., Eckert, J., (2000) Appl. Phys. Lett., 77 (8), p. 1153Chen, M.W., Zhang, T., Inoue, A., Sakai, A., Sakurai, T., (1999) Appl. Phys. Lett., 75 (12), p. 1697Murty, B.S., Ping, D.H., Hono, K., (2000) Appl. Phys. Lett., 77 (8), p. 1102Inoue, A., Zhang, T., Saida, J., Matsushita, M., Chen, M.W., Sakurai, T., (1999) Mater. Trans. JIM, 40 (10), p. 1137Murty, B.S., Ping, D.H., Hono, K., Inoue, A., (2000) Scripta Mater., 43 (2), p. 103Yavari, A.R., Zhang, T., Inoue, A., Botta, F.W.J., Kvick, A., (2000) Scripta Mater.Mizutani, U., Kamiya, A., Matsuda, T., Takeuchi, S., (2000) Mater. Sci. Eng. A, 133, p. 111Tsai, A.P., Hiraga, K., Inoue, A., Masumoto, T., (1994) Phys. Rev. B, 49 (5), p. 3569Biggs, B.D., Li, Y., Poon, S.J., (1991) Phys. Rev. B, 43, p. 8747Yavari, A.R., LeMoulec, A., Inoue, A., Saida, J., Li, C., Botta, W.J.F., Vaughan, G., Kvick, A., (2000) J. Met. Nanocryst. Mater., 8, p. 151Paik, J.H., Botta, W.J.F., Yavari, A.R., (1996) Mater. Sci. Forum, 226, p. 30
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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