Perpendicular Exchange Bias of [Pt/Co]5/IrMn Multilayers on Self-Organized Hexagonally Patterned Nanodots

被引：3

作者：

Li, Wen-Jing ^{[1
]}

Zhang, Qintong ^{[1
]}

Javed, Khalid ^{[1
]}

Wei, Hongxiang ^{[1
]}

Chen, Aitian ^{[2
]}

Zhao, Yonggang ^{[2
]}

Han, Xiu-Feng ^{[1
]}

机构：

[1] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China

[2] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China

来源：

IEEE MAGNETICS LETTERS | 2015年 / 6卷

基金：

中国国家自然科学基金;

关键词：

Current topics; nanomagnetics; exchange bias; Pt/Co](5)/IrMn; perpendicular magnetic anisotropy; NANOSTRUCTURES; ANISOTROPY; STORAGE;

D O I：

10.1109/LMAG.2015.2474535

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

[Pt/Co](5)/IrMn multilayers were deposited on hexagonally patterned nanodots on the backside of anodized alumina oxide (AAO) templates and thermally oxidized Si substrates. AAO templates with different diameters of about 50, 60, 130 and 400 nm nanodots were used to fabricate the exchange-biased nanostructures and investigate the size effect on the perpendicular exchange bias. With decreasing nanodots diameter, the multilayers exhibited large variations in both exchange bias field H-E and coercivity H-C. Compared to the flat film, H-E of the nanodots samples was significantly enhanced, which can be attributed to the reduction in antiferromagnetic and ferromagnetic domain sizes induced by the curved morphology and domain wall pinning between two adjacent magnetic nanocaps. Unexpectedly, the 50 nm nanodot sample had higher thermal stability than the flat film sample.

引用

页数：4

共 29 条

[1] Magnetic multilayers on nanospheres [J].

Albrecht, M ;

Hu, GH ;

Guhr, IL ;

Ulbrich, TC ;

Boneberg, J ;

Leiderer, P ;

Schatz, G .

NATURE MATERIALS, 2005, 4 (03) :203-206

[2] Thermal activation effects on the exchange bias in ferromagnetic-antiferromagnetic nanostructures [J].

Baltz, V ;

Sort, J ;

Rodmacq, B ;

Dieny, B ;

Landis, S .

PHYSICAL REVIEW B, 2005, 72 (10)

[3] 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)

[4] Size effects on exchange bias in sub-100 nm ferromagnetic-antiferromagnetic dots deposited on prepatterned substrates [J].

Baltz, V ;

Sort, J ;

Rodmacq, B ;

Dieny, B ;

Landis, S .

APPLIED PHYSICS LETTERS, 2004, 84 (24) :4923-4925

[5] Origin of the asymmetric magnetization reversal behavior in exchange-biased systems:: Competing anisotropies -: art. no. 057204 [J].

Camarero, J ;

Sort, J ;

Hoffmann, A ;

García-Martín, JM ;

Dieny, B ;

Miranda, R ;

Nogués, J .

PHYSICAL REVIEW LETTERS, 2005, 95 (05)

[6] The emergence of spin electronics in data storage [J].

Chappert, Claude ;

Fert, Albert ;

Van Dau, Frederic Nguyen .

NATURE MATERIALS, 2007, 6 (11) :813-823

[7] Thermally activated magnetization reversal in exchange-biased [Pt/Co]3/Pt/IrMn multilayers [J].

Czapkiewicz, Maciej ;

Stobiecki, Tomasz ;

van Dijken, Sebastiaan .

PHYSICAL REVIEW B, 2008, 77 (02)

[8] Size dependence of the exchange bias field in NiO/Ni nanostructures [J].

Fraune, M ;

Rüdiger, U ;

Güntherodt, G ;

Cardoso, S ;

Freitas, P .

APPLIED PHYSICS LETTERS, 2000, 77 (23) :3815-3817

[9] Magnetization of small arrays of interacting single-domain particles [J].

Grundler, D ;

Meier, G ;

Broocks, KB ;

Heyn, C ;

Heitmann, D .

JOURNAL OF APPLIED PHYSICS, 1999, 85 (08) :6175-6177

[10] Exchange-biased spin-valves for magnetic storage [J].

Kools, JCS .

IEEE TRANSACTIONS ON MAGNETICS, 1996, 32 (04) :3165-3184

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