MICROMAGNETIC STUDIES OF INHOMOGENEOUS NUCLEATION IN HARD MAGNETS

被引：73

作者：

SAKUMA, A

TANIGAWA, S

TOKUNAGA, M

机构：

[1] Magnetic and Electronic Materials Research Laboratory, Hitachi Metals, Ltd., Saitama, 360

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1990年 / 84卷 / 1-2期

关键词：

D O I：

10.1016/0304-8853(90)90162-J

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nucleation fields of reversed domains in hard magnets with magnetic planar defect are calculated based upon micromagnetism. We show that the reversal processes are classified into three types depending on the parameters characterizing the defect. In a certain region of the parameters, there exists the case where the magnetization in the defect is forced to rotate reversely by an applied field which does not yet bring about the reversal rotation in the host matrices. We suggest that this situation gives a crucial role for the angular dependence of the nucleation fields in Ne-Fe-B sintered magnets. © 1990.

引用

收藏

页码：52 / 58

页数：7

相关论文

共 11 条

[1] NEW THEORY OF COERCIVE FORCE OF FERROMAGNETIC MATERIALS [J].

FRIEDBERG, R ;

PAUL, DI .

PHYSICAL REVIEW LETTERS, 1975, 34 (19) :1234-1237

[2] ANALYSIS OF THE MAGNETIC HARDENING MECHANISM IN RE-FEB PERMANENT-MAGNETS [J].

KRONMULLER, H ;

DURST, KD ;

SAGAWA, M .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1988, 74 (03) :291-302

[3]

Kronmuller H., 1976, Journal of Magnetism and Magnetic Materials, V2, P3, DOI 10.1016/0304-8853(75)90097-9

[4] THEORY OF NUCLEATION FIELDS IN INHOMOGENEOUS FERROMAGNETS [J].

KRONMULLER, H .

PHYSICA STATUS SOLIDI B-BASIC RESEARCH, 1987, 144 (01) :385-396

[5] ANGULAR-DEPENDENCE OF THE COERCIVE FIELD IN SINTERED FE77ND15B8 MAGNETS [J].

KRONMULLER, H ;

DURST, KD ;

MARTINEK, G .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1987, 69 (02) :149-157

[6] MICROSTRUCTURE OF MELT-SPUN ND-FE-B MAGNEQUENCH MAGNETS [J].

MISHRA, RK .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1986, 54-7 :450-456

[7] GENERAL-THEORY OF THE COERCIVE FORCE DUE TO DOMAIN-WALL PINNING [J].

PAUL, DI .

JOURNAL OF APPLIED PHYSICS, 1982, 53 (03) :1649-1654

[8] MAGNETIC-PROPERTIES OF THE BCC PHASE AT GRAIN-BOUNDARIES IN THE ND-FE-B PERMANENT-MAGNET [J].

SAGAWA, M ;

HIROSAWA, S ;

YAMAMOTO, H ;

MATSUURA, Y ;

FUJIMURA, S ;

TOKUHARA, H ;

HIRAGA, K .

IEEE TRANSACTIONS ON MAGNETICS, 1986, 22 (05) :910-912

[9] MAGNETIC HARDENING MECHANISM IN SINTERED R-FE-B PERMANENT-MAGNETS [J].

SAGAWA, M ;

HIROSAWA, S .

JOURNAL OF MATERIALS RESEARCH, 1988, 3 (01) :45-54

[10] A MECHANISM OF MAGNETIC HYSTERESIS IN HETEROGENEOUS ALLOYS [J].

STONER, EC ;

WOHLFARTH, EP .

PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1948, 240 (826) :599-642