Competing interfacial exchange and Zeeman energies in exchange biased bilayers

被引：85

作者：

Leighton, C ^{[1
]}

Nogués, J

Suhl, H

Schuller, IK

机构：

[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[2] Univ Autonoma Barcelona, Dept Fis, Grp Electromagnetisme, E-08193 Barcelona, Spain

来源：

PHYSICAL REVIEW B | 1999年 / 60卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.60.12837

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The exchange bias in antiferromagnet (MnF2)/ferromagnet (Fe) bilayers has been studied as a function of temperature, cooling field, and interfacial roughness. Positive exchange bias is observed under certain conditions, along with a nonmonotonic roughness dependence. The unusual cooling field dependence can be understood within a simple model in which the exchange bias is determined by a competition between a roughness-dependent average exchange energy and a Zeeman energy for the antiferromagnet surface spins. Our results are consistent with the existence of a domain wall parallel to the interface in the Fe layer, contrary to earlier theoretical models. [S0163-1829(99)08541-0].

引用

页码：12837 / 12840

页数：4

共 24 条

[1] NEW APPROACH TO THE THEORY OF SUPEREXCHANGE INTERACTIONS [J].

ANDERSON, PW .

PHYSICAL REVIEW, 1959, 115 (01) :2-13

[2] PHASE-DIAGRAM OF THIN ANTIFERROMAGNETIC FILMS IN STRONG MAGNETIC-FIELDS [J].

CARRICO, AS ;

CAMLEY, RE ;

STAMPS, RL .

PHYSICAL REVIEW B, 1994, 50 (18) :13453-13460

[3] 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

[4]

FITZSIMMONS MR, UNPUB

[5] STRUCTURAL REFINEMENT OF SUPERLATTICES FROM X-RAY-DIFFRACTION [J].

FULLERTON, EE ;

SCHULLER, IK ;

VANDERSTRAETEN, H ;

BRUYNSERAEDE, Y .

PHYSICAL REVIEW B, 1992, 45 (16) :9292-9310

[6] Structure and magnetic properties of exchange-spring Sm-Co/Co superlattices [J].

Fullerton, EE ;

Jiang, JS ;

Sowers, CH ;

Pearson, JE ;

Bader, SD .

APPLIED PHYSICS LETTERS, 1998, 72 (03) :380-382

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

Hong, TM .

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

[8]

KIWI M, UNPUB

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

Koon, NC .

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

[10] Exchange anisotropy and the antiferromagnetic surface order parameter [J].

Lederman, D ;

Nogues, J ;

Schuller, IK .

PHYSICAL REVIEW B, 1997, 56 (05) :2332-2335

← 1 2 3 →