Coupling mechanisms in exchange biased films (invited)

被引：134

作者：

Schulthess, TC ^{[1
]}

Butler, WH ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA

来源：

JOURNAL OF APPLIED PHYSICS | 1999年 / 85卷 / 08期

关键词：

D O I：

10.1063/1.369878

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We use an atomistic Heisenberg model in conjunction with the classical Landau Lifshitz equation for the spin motion to study coupling mechanisms between ferromagnetic (FM) and antiferromagnetic (AFM) films. Calculations for CoO/FM illustrate that there are two coupling mechanisms at work, the spin-flop coupling and an AFM-FM coupling through uncompensated defects. While the latter accounts for exchange bias and related phenomena, the former gives rise to a large coercivity and perpendicular alignment between FM spins and AFM easy axis. A combination of the two mechanisms explains apparent discrepancies between reversible and irreversible measurements of the AFM-FM coupling. (C) 1999 American Institute of Physics. [S0021-8979(99)31508-5].

引用

页码：5510 / 5515

页数：6

共 31 条

[1] MAGNETIC-PROPERTIES OF FERROMAGNET-ANTIFERROMAGNET SUPERLATTICE STRUCTURES WITH MIXED-SPIN ANTIFERROMAGNETIC SHEETS [J].

HINCHEY, LL ;

MILLS, DL .

PHYSICAL REVIEW B, 1986, 34 (03) :1689-1699

[2]

HOU C, IN PRESS MAT RES SOC

[3] Perpendicular coupling in exchange-biased Fe3O4/CoO superlattices [J].

Ijiri, Y ;

Borchers, JA ;

Erwin, RW ;

Lee, SH ;

van der Zaag, PJ ;

Wolf, RM .

PHYSICAL REVIEW LETTERS, 1998, 80 (03) :608-611

[4] RANDOM-FIELD INSTABILITY OF ORDERED STATE OF CONTINUOUS SYMMETRY [J].

IMRY, Y ;

MA, S .

PHYSICAL REVIEW LETTERS, 1975, 35 (21) :1399-1401

[5]

JUNBLUT R, 1995, J MAGN MAGN MATER, V148, P300

[6] Calculations of exchange bias in thin films with ferromagnetic/antiferromagnetic interfaces [J].

Koon, NC .

PHYSICAL REVIEW LETTERS, 1997, 78 (25) :4865-4868

[7] EXCHANGE-COUPLED NI-FE/FE-MN, NI-FE/NI-MN AND NIO/NI-FE FILMS FOR STABILIZATION OF MAGNETORESISTIVE SENSORS [J].

LIN, T ;

TSANG, C ;

FONTANA, RE ;

HOWARD, JK .

IEEE TRANSACTIONS ON MAGNETICS, 1995, 31 (06) :2585-2590

[8] HEISENBERG-TO-ISING CROSSOVER IN A RANDOM-FIELD MODEL WITH UNIAXIAL ANISOTROPY [J].

MALOZEMOFF, AP .

PHYSICAL REVIEW B, 1988, 37 (13) :7673-7679

[9] MECHANISMS OF EXCHANGE-ANISOTROPY [J].

MALOZEMOFF, AP .

JOURNAL OF APPLIED PHYSICS, 1988, 63 (08) :3874-3879

[10] RANDOM-FIELD MODEL OF EXCHANGE-ANISOTROPY AT ROUGH FERROMAGNETIC-ANTIFERROMAGNETIC INTERFACES [J].

MALOZEMOFF, AP .

PHYSICAL REVIEW B, 1987, 35 (07) :3679-3682

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