Exchange bias in ferromagnetic/compensated antiferromagnetic bilayers

被引：21

作者：

Deng, DS ^{[1
]}

Jin, XF

Tao, RB

机构：

[1] Fudan Univ, State Key Lab Appl Surface Phys, Shanghai 200433, Peoples R China

[2] Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China

[3] Chinese Ctr Adv Sci & Technol, World Lab, Beijing 100080, Peoples R China

来源：

PHYSICAL REVIEW B | 2002年 / 65卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.65.172402

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

By means of micromagnetic spin dynamics calculations, a quantitative calculation is carried out to explore the mechanism of exchange bias (EB) in ferromagnetic (FM)/compensated antiferromagnetic (AFM) bilayers. The antiferromagnets with low and high Neel temperatures have been both considered, and the crossover from negative to positive EB is found in the case with low Neel temperature. We propose that the mechanism of EB in FM/compensated AFM bilayers is due to the symmetry breaking of AFM that yields some net ferromagnetic components during cooling process.

引用

页码：1724021 / 1724024

页数：4

共 20 条

[1] Exchange anisotropy - a review [J].

Berkowitz, AE ;

Takano, K .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1999, 200 (1-3) :552-570

[2] GIANT MAGNETORESISTANCE IN SOFT FERROMAGNETIC MULTILAYERS [J].

DIENY, B ;

SPERIOSU, VS ;

PARKIN, SSP ;

GURNEY, BA ;

WILHOIT, DR ;

MAURI, D .

PHYSICAL REVIEW B, 1991, 43 (01) :1297-1300

[3] Asymmetric magnetization reversal in exchange-biased hysteresis loops [J].

Fitzsimmons, MR ;

Yashar, P ;

Leighton, C ;

Schuller, IK ;

Nogués, J ;

Majkrzak, CF ;

Dura, JA .

PHYSICAL REVIEW LETTERS, 2000, 84 (17) :3986-3989

[4] Simple mechanism for a positive exchange bias [J].

Hong, TM .

PHYSICAL REVIEW B, 1998, 58 (01) :97-100

[5] Exchange bias model for Fe/FeF2:: Role of domains in the ferromagnet [J].

Kiwi, M ;

Mejía-López, J ;

Portugal, RD ;

Ramírez, R .

EUROPHYSICS LETTERS, 1999, 48 (05) :573-579

[6] Positive exchange bias model:: Fe/FeF2 and Fe/MnF2 bilayers [J].

Kiwi, M ;

Mejía-López, J ;

Portugal, RD ;

Ramírez, R .

SOLID STATE COMMUNICATIONS, 2000, 116 (06) :315-319

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

Koon, NC .

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

[8] Competing interfacial exchange and Zeeman energies in exchange biased bilayers [J].

Leighton, C ;

Nogués, J ;

Suhl, H ;

Schuller, IK .

PHYSICAL REVIEW B, 1999, 60 (18) :12837-12840

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

MALOZEMOFF, AP .

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

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

MALOZEMOFF, AP .

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

← 1 2 →