Size and shape dependence of the exchange-bias field in exchange-coupled ferrimagnetic bilayers

被引：21

作者：

Ziese, M

Höhne, R

Bollero, A

Semmelhack, HC

Esquinazi, P

Zimmer, K

机构：

[1] Univ Leipzig, Div Superconduct & Magnetism, D-04103 Leipzig, Germany

[2] Inst Surface Modificat, D-04318 Leipzig, Germany

来源：

EUROPEAN PHYSICAL JOURNAL B | 2005年 / 45卷 / 02期

关键词：

D O I：

10.1140/epjb/e2005-00177-4

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Exchange biasing was studied in an exchange-spring system consisting of two ferrimagnetic films with different coercivity. Magnetite and Co-Fe ferrite were chosen as the soft and hard magnetic bilayer components, respectively. The samples were epitaxially grown on MgO single crystal substrates by pulsed laser deposition. The exchange-bias field was investigated as a function of system size and shape, magnetic field direction and magnetization reversal in the hard layer. A clear dependence of the exchange-bias field on the sample size and shape was found. This was attributed to an interplay between exchange and dipolar energies. Micromagnetic simulations agree with the experimental results.

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页码：223 / 230

页数：8

相关论文

共 30 条

[1] FRACTIONAL SPIN POLARIZATION IN MODEL OF PHOTOEMISSION FROM LOCALIZED SHELLS [J].

ALVARADO, SF ;

BAGUS, PS .

PHYSICS LETTERS A, 1978, 67 (5-6) :397-398

[2] Tailoring size effects on the exchange bias in ferromagnetic-antiferromagnetic <100 nm nanostructures -: art. no. 117201 [J].

Baltz, V ;

Sort, J ;

Landis, S ;

Rodmacq, B ;

Dieny, B .

PHYSICAL REVIEW LETTERS, 2005, 94 (11)

[3] Influence of thickness on microstructural and magnetic properties in Fe3O4 thin films produced by PLD [J].

Bollero, A ;

Ziese, M ;

Höhne, R ;

Semmelhack, HC ;

Köhler, U ;

Setser, A ;

Esquinazi, P .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2005, 285 (1-2) :279-289

[4] MAGNETIC AND ELECTRIC PROPERTIES OF MAGNETITE AT LOW TEMPERATURES [J].

CALHOUN, BA .

PHYSICAL REVIEW, 1954, 94 (06) :1577-1585

[5] Magnetic behavior of exchange-coupled Fe30Au70/Fe65Au35 bilayers -: art. no. 094402 [J].

Canet, F ;

Bellouard, C ;

Joly, L ;

Mangin, S .

PHYSICAL REVIEW B, 2004, 69 (09)

[6] Evidence for the half-metallic ferromagnetic state of Fe3O4 by spin-resolved photoelectron spectroscopy -: art. no. 064417 [J].

Dedkov, YS ;

Rüdiger, U ;

Güntherodt, G .

PHYSICAL REVIEW B, 2002, 65 (06) :1-5

[7]

Donahue M. J., 1999, 6376 NISTIR

[8] Thermal phenomena in IrMn exchange biased systems [J].

Fernández-Outón, LE ;

O'Grady, K ;

Carey, MJ .

JOURNAL OF APPLIED PHYSICS, 2004, 95 (11) :6852-6854

[9] Exchange-spring behavior in epitaxial hard/soft magnetic bilayers [J].

Fullerton, EE ;

Jiang, JS ;

Grimsditch, M ;

Sowers, CH ;

Bader, SD .

PHYSICAL REVIEW B, 1998, 58 (18) :12193-12200

[10] Experimental determination of the magnetic phase diagram of Gd/Fe multilayers [J].

Hahn, W ;

Loewenhaupt, M ;

Huang, YY ;

Felcher, GP ;

Parkin, SSP .

PHYSICAL REVIEW B, 1995, 52 (22) :16041-16048