Changes in magnetic anisotropy distribution during structural evolution of Fe76Si10.5B9.5Cu1Nb3

被引：30

作者：

Franco, V ^{[1
]}

Conde, CF ^{[1
]}

Conde, A ^{[1
]}

机构：

[1] Univ Sevilla, CSIC, Inst Ciencia Mat, Dept Fis Mat Condensada, E-41080 Seville, Spain

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1998年 / 185卷 / 03期

关键词：

FINEMET alloy; nanocrystalline alloys; crystallization; magnetic anisotropy; hysteresis;

D O I：

10.1016/S0304-8853(98)00061-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetic properties of Fe76Si10.5B9.5Cu1Nb3 have been correlated to the structural evolution of this alloy upon heat treatment. The influence of isochronal annealing on the hysteresis loop has been analysed. The very beginnings of nanocrystallization causes a slight magnetic hardening in the samples which will be overcome by the enhancement of the volume fraction of the Fe,Si crystallites. For further beat treatment, the appearance of boride-type phases provokes an abrupt magnetic hardening, whilst final recrystallization phenomena can hardly decrease coercivity. The evolution of the magnetic anisotropy distribution upon heat treatment has been explained. in the light of the generalized random anisotropy model. The appearance of new origins of anisotropy (magnetocrystalline) and the development of new stresses in the sample by the emerging crystallites makes the magnetic anisotropy distribution shift to higher values and unfold in various maxima. In the range of crystallized volume fraction and grain size where Herzer's model is applicable, the distribution folds again and certainly resembles that of the relaxed amorphous due to the effective averaging of macroscopic magnetic anisotropy. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：353 / 359

页数：7

共 16 条

[1] DISTRIBUTION OF THE MAGNETIC-ANISOTROPY IN AMORPHOUS-ALLOYS RIBBONS [J].

BARANDIARAN, JM ;

VAZQUEZ, M ;

HERNANDO, A ;

GONZALEZ, J ;

RIVERO, G .

IEEE TRANSACTIONS ON MAGNETICS, 1989, 25 (05) :3330-3332

[2]

Bozorth R. M., 1968, FERROMAGNETISM

[3]

CHIKAZUMI S, 1978, PHYSICS MAGNETISM

[4]

Conde C. F., 1997, Rapidly Quenched and Metastable Materials. Proceedings of the Ninth International Conference on Rapidly Quenched and Metastable Materials. Supplement, P254

[5] THERMOMAGNETIC STUDY OF DEVITRIFICATION IN NANOCRYSTALLINE FE(CR)SIB-CUNB ALLOYS [J].

CONDE, CF ;

MILLAN, M ;

CONDE, A .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1994, 138 (03) :314-318

[6] Autocalibrating quasistatic M-H hysteresis loop tracer with negligible drift [J].

Franco, V ;

RamosMartos, J ;

Conde, A .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1996, 67 (12) :4167-4170

[7]

FRANCO V, 1997, B SOC ESP CERAM VIDR, V36, P185

[8] ANALYSIS OF THE DEPENDENCE OF SPIN-SPIN CORRELATIONS ON THE THERMAL-TREATMENT OF NANOCRYSTALLINE MATERIALS [J].

HERNANDO, A ;

VAZQUEZ, M ;

KULIK, T ;

PRADOS, C .

PHYSICAL REVIEW B, 1995, 51 (06) :3581-3586

[9]

Herzer G., 1992, Nanostructured Materials, V1, P263, DOI 10.1016/0965-9773(92)90106-8

[10] GRAIN-STRUCTURE AND MAGNETISM OF NANOCRYSTALLINE FERROMAGNETS [J].

HERZER, G .

IEEE TRANSACTIONS ON MAGNETICS, 1989, 25 (05) :3327-3329

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