Enhancement of perpendicular magnetic anisotropy thanks to Pt insertions in synthetic antiferromagnets

被引：37

作者：

Bandiera, S. ^{[1
]}

Sousa, R. C. ^{[1
]}

Auffret, S. ^{[1
]}

Rodmacq, B. ^{[1
]}

Dieny, B. ^{[1
]}

机构：

[1] UMR 8191 CEA CNRS UJF Grenoble 1 Grenoble INP, SPINTEC, CEA INAC, F-38054 Grenoble, France

来源：

APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 07期

关键词：

INTERLAYER EXCHANGE; MAGNETORESISTANCE;

D O I：

10.1063/1.4745924

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Synthetic antiferromagnets are of great interest as reference layers in magnetic tunnel junctions since they allow decreasing the dipolar coupling between the two magnetic electrodes and exhibit larger pinning fields than single reference layers. In this letter, we investigate the effect of the insertion of an ultrathin Pt layer in contact with the Ru spacer in synthetic antiferromagnets with perpendicular magnetic anisotropy. Surprisingly, for Ru thickness below 0.75 nm, the antiferromagnetic coupling amplitude through Ru first increases upon Pt insertion up to a critical Pt thickness (similar to 0.25 nm) above which coupling decreases. In addition, the corresponding increase of perpendicular magnetic anisotropy enhances the thermal stability of the structure. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4745924]

引用

页数：4

共 18 条

[1] Balancing interlayer dipolar interactions in multilevel patterned media with out-of-plane magnetic anisotropy [J].

Baltz, V. ;

Rodmacq, B. ;

Bollero, A. ;

Ferre, J. ;

Landis, S. ;

Dieny, B. .

APPLIED PHYSICS LETTERS, 2009, 94 (05)

[2] Asymmetric Interfacial Perpendicular Magnetic Anisotropy in Pt/Co/Pt Trilayers [J].

Bandiera, S. ;

Sousa, R. C. ;

Rodmacq, B. ;

Dieny, B. .

IEEE MAGNETICS LETTERS, 2011, 2

[3] Comparison of Synthetic Antiferromagnets and Hard Ferromagnets as Reference Layer in Magnetic Tunnel Junctions With Perpendicular Magnetic Anisotropy [J].

Bandiera, S. ;

Sousa, R. C. ;

Dahmane, Y. ;

Ducruet, C. ;

Portemont, C. ;

Baltz, V. ;

Auffret, S. ;

Prejbeanu, I. L. ;

Dieny, B. .

IEEE MAGNETICS LETTERS, 2010, 1

[4] Theory of interlayer exchange interactions in magnetic multilayers [J].

Bruno, P .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1999, 11 (48) :9403-9419

[5]

Hutchby J., 2010, ASS POT MAT SEL EM R

[6] A THEORY OF METALLIC FERROMAGNETISM AND ANTIFERROMAGNETISM ON ZENERS MODEL [J].

KASUYA, T .

PROGRESS OF THEORETICAL PHYSICS, 1956, 16 (01) :45-57

[7] Interlayer magnetic coupling: Effect of alloying in the spacer [J].

Kudrnovsky, J ;

Drchal, V ;

Bruno, P ;

Turek, I ;

Weinberger, P .

PHYSICAL REVIEW B, 1996, 54 (06) :R3738-R3741

[8] Amplitude and phase of the oscillatory exchange coupling between Fe-Co-Ni alloy layers across a Cu spacer layer [J].

Kudrnovsky, J ;

Drchal, V ;

Coehoorn, R ;

Sob, M ;

Weinberger, P .

PHYSICAL REVIEW LETTERS, 1997, 78 (02) :358-361

[9] Spin valves exchange biased by Co/Ru/Co synthetic antiferromagnets [J].

Leal, JL ;

Kryder, MH .

JOURNAL OF APPLIED PHYSICS, 1998, 83 (07) :3720-3723

[10] MgO barrier-perpendicular magnetic tunnel junctions with CoFe/Pd multilayers and ferromagnetic insertion layers [J].

Mizunuma, K. ;

Ikeda, S. ;

Park, J. H. ;

Yamamoto, H. ;

Gan, H. ;

Miura, K. ;

Hasegawa, H. ;

Hayakawa, J. ;

Matsukura, F. ;

Ohno, H. .

APPLIED PHYSICS LETTERS, 2009, 95 (23)

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