FeRh/FePt exchange spring films for thermally assisted magnetic recording media

被引：388

作者：

Thiele, JU ^{[1
]}

Maat, S ^{[1
]}

Fullerton, EE ^{[1
]}

机构：

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

来源：

APPLIED PHYSICS LETTERS | 2003年 / 82卷 / 17期

关键词：

D O I：

10.1063/1.1571232

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The temperature-dependent magnetic response of exchange-coupled FePt/FeRh thin films is described. The FePt forms a high magnetocrystalline anisotropy, high-coercivity ferromagnetic layer. The FeRh layer is antiferromagnetic at room temperature but, upon heating above a transition temperature, becomes ferromagnetic with a large magnetic moment and low magnetocrystalline anisotropy, forming an exchange-spring system and significantly lowering the coercive field of the composite system. This feature opens intriguing possibilities for media applications for thermally assisted magnetic recording where the ferromagnetic phase of FeRh is exploited to help write the media while the antiferromagnetic phase supports the long-time stability. (C) 2003 American Institute of Physics.

引用

页码：2859 / 2861

页数：3

共 22 条

[1] NEAR-FIELD MAGNETOOPTICS AND HIGH-DENSITY DATA-STORAGE [J].

BETZIG, E ;

TRAUTMAN, JK ;

WOLFE, R ;

GYORGY, EM ;

FINN, PL ;

KRYDER, MH ;

CHANG, CH .

APPLIED PHYSICS LETTERS, 1992, 61 (02) :142-144

[2] ENHANCED MAGNETOOPTICAL KERR-EFFECT IN SPONTANEOUSLY ORDERED FEPT ALLOYS - QUANTITATIVE AGREEMENT BETWEEN THEORY AND EXPERIMENT [J].

CEBOLLADA, A ;

WELLER, D ;

STICHT, J ;

HARP, GR ;

FARROW, RFC ;

MARKS, RF ;

SAVOY, R ;

SCOTT, JC .

PHYSICAL REVIEW B, 1994, 50 (05) :3419-3422

[3] Microstructure and thermal stability of advanced longitudinal media [J].

Doerner, MF ;

Tang, K ;

Arnoldussen, T ;

Zeng, H ;

Toney, MF ;

Weller, D .

IEEE TRANSACTIONS ON MAGNETICS, 2000, 36 (01) :43-47

[4] Extraordinary optical transmission through sub-wavelength hole arrays [J].

Ebbesen, TW ;

Lezec, HJ ;

Ghaemi, HF ;

Thio, T ;

Wolff, PA .

NATURE, 1998, 391 (6668) :667-669

[5] 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

[6] Switching behavior of Fe-Pt/Ni-Fe exchange-spring films studied by resonant soft-x-ray magneto-optical Kerr effect [J].

Hellwig, O ;

Kortright, JB ;

Takano, K ;

Fullerton, EE .

PHYSICAL REVIEW B, 2000, 62 (17) :11694-11698

[7]

HSIA YT, 2002, P ASME TRIB S CANC M

[8] THE EXCHANGE-SPRING MAGNET - A NEW MATERIAL PRINCIPLE FOR PERMANENT-MAGNETS [J].

KNELLER, EF ;

HAWIG, R .

IEEE TRANSACTIONS ON MAGNETICS, 1991, 27 (04) :3588-3600

[9] UNUSUAL NATURE OF ABRUPT MAGNETIC TRANSITION IN FERH AND ITS PSEUDOBINARY VARIANTS [J].

KOUVEL, JS .

JOURNAL OF APPLIED PHYSICS, 1966, 37 (03) :1257-&

[10] ANOMALOUS MAGNETIC MOMENTS AND TRANSFORMATIONS IN ORDERED ALLOY FERH [J].

KOUVEL, JS ;

HARTELIUS, CC .

JOURNAL OF APPLIED PHYSICS, 1962, 33 (03) :1343-&

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