Nonlinear and hysteretic exchange bias in antiferromagnetically coupled ferromagnetic bilayers

被引：19

作者：

Berger, A. ^{[1
,2
]}

Hovorka, O. ^{[1
,3
]}

Friedman, G. ^{[3
]}

Fullerton, E. E. ^{[2
,4
]}

机构：

[1] CIC NanoGUNE Consolider, E-20018 Donostia San Sebastian, Spain

[2] Hitachi Global Storage Technol, San Jose Res Ctr, San Jose, CA 95120 USA

[3] Drexel Univ, Dept Elect & Comp Engn, Philadelphia, PA 19104 USA

[4] Univ Calif San Diego, Ctr Magnet Recording Res, San Diego, CA 92093 USA

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 22期

关键词：

antiferromagnetic materials; exchange interactions (electron); ferromagnetic materials; magnetic hysteresis; permanent magnets;

D O I：

10.1103/PhysRevB.78.224407

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report observations of nonlinear and hysteretic exchange bias in antiferromagnetically coupled hard/soft ferromagnetic bilayers. In such systems, the hard ferromagnetic layer acts as a tunable biasing layer replacing the antiferromagnet used in conventional exchange bias structures. It is shown that the reported behavior is due to the reciprocity of the exchange bias effect in conjunction with the presence of locally varying interfacial exchange which causes a preferential magnetization of the weakly exchange-coupled tuning regions during the exchange bias setting stage.

引用

页数：6

共 31 条

[1] Colloquium:: Opportunities in nanomagnetism [J].

Bader, SD .

REVIEWS OF MODERN PHYSICS, 2006, 78 (01) :1-15

[2] Reversible hysteresis loop tuning [J].

Berger, A ;

Binek, C ;

Margulies, DT ;

Moser, A ;

Fullerton, EE .

PHYSICA B-CONDENSED MATTER, 2006, 372 (1-2) :168-172

[3] Magnetic tuning of hysteresis loop properties in antiferromagnetically coupled bilayers [J].

Berger, A ;

Margulies, DT ;

Do, H .

JOURNAL OF APPLIED PHYSICS, 2004, 95 (11) :6660-6662

[4] Magnetic hysteresis loop tuning in antiferromagnetically coupled bilayer structures [J].

Berger, A ;

Margulies, DT ;

Do, H .

APPLIED PHYSICS LETTERS, 2004, 85 (09) :1571-1573

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

Berkowitz, AE ;

Takano, K .

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

[6] Exchange bias training effect in coupled all ferromagnetic bilayer structures - art. no. 067201 [J].

Binek, C ;

Polisetty, S ;

He, X ;

Berger, A .

PHYSICAL REVIEW LETTERS, 2006, 96 (06)

[7] Training of the exchange-bias effect: A simple analytic approach [J].

Binek, C .

PHYSICAL REVIEW B, 2004, 70 (01) :014421-1

[8] Origin of the training effect and asymmetry of the magnetization in polycrystalline exchange bias systems [J].

Brems, Steven ;

Temst, Kristiaan ;

Van Haesendonck, Chris .

PHYSICAL REVIEW LETTERS, 2007, 99 (06)

[9] 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

[10] Influence of interfacial disorder and temperature on magnetization reversal in exchange-coupled bilayers -: art. no. 104415 [J].

Fitzsimmons, MR ;

Leighton, C ;

Hoffmann, A ;

Yashar, PC ;

Nogués, J ;

Liu, K ;

Majkrzak, CF ;

Dura, JA ;

Fritzsche, H ;

Schuller, IK .

PHYSICAL REVIEW B, 2001, 64 (10) :1044151-1044155

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