Perpendicular exchange coupling in TbFeCo/FePt bilayer films

被引：2

作者：

Zha, CL

Zhang, YS

Ma, B ^{[1
]}

Zhang, ZZ

Jin, QY

Gan, FX

Liu, YW

Gao, TR

机构：

[1] Fudan Univ, State Key Lab Adv Photon Mat & Devices, Shanghai 200433, Peoples R China

[2] Fudan Univ, Dept Opt Sci & Engn, Shanghai 200433, Peoples R China

[3] Tongji Univ, Dept Phys, Shanghai 200092, Peoples R China

[4] Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China

来源：

CHINESE PHYSICS LETTERS | 2006年 / 23卷 / 04期

关键词：

D O I：

10.1088/0256-307X/23/4/060

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the structure and exchange coupling in TbFeCo/FePt bilayer films. It is found that FePt has the L1(0) structure and the easy axis of the FePt film is perpendicular to the film plane. Results of the vibrating sample magnetometer and the magneto-optical Kerr effect measurements show a strong perpendicular exchange coupling between the ferrimagnetic TbRCo layer and the hard ferromagnetic FePt layer. The magnetization direction of each layer and the process of magnetization reversal are discussed in detail. The switching field dependence on the exchange coupling has been modelled by micromagnetic simulation and the interlayer coupling constant is about -0.9 erg/cm(2) according to this simulation.

引用

收藏

页码：978 / 981

页数：4

相关论文

共 13 条

[1] Magnetic anisotropy and microstructure in molecular beam epitaxial FePt(110)/MgO(110) [J].

Farrow, RFC ;

Weller, D ;

Marks, RF ;

Toney, MF ;

Smith, DJ ;

McCartney, MR .

JOURNAL OF APPLIED PHYSICS, 1998, 84 (02) :934-939

[2] Magnetization reversal via perpendicular exchange spring in FePt/FeRh bilayer films [J].

Guslienko, KY ;

Chubykalo-Fesenko, O ;

Mryasov, O ;

Chantrell, R ;

Weller, D .

PHYSICAL REVIEW B, 2004, 70 (10) :104405-1

[3] MAGNETIC AND MAGNETO-OPTICAL PROPERTIES OF RARE-EARTH TRANSITION-METAL ALLOYS CONTAINING GD, TB, FE, CO [J].

HANSEN, P ;

CLAUSEN, C ;

MUCH, G ;

ROSENKRANZ, M ;

WITTER, K .

JOURNAL OF APPLIED PHYSICS, 1989, 66 (02) :756-767

[4] High interfacial exchange energy in TbFeCo exchange-bias films [J].

Lin, CC ;

Lai, CH ;

Jiang, RF ;

Shieh, HPD .

JOURNAL OF APPLIED PHYSICS, 2003, 93 (10) :6832-6834

[5] Micromagnetic simulation for tunnel junctions with synthetic antiferromagnetic pinned layers annealed at different external fields [J].

Liu, YW ;

Zhang, ZZ ;

Zhang, ZG ;

Freitas, PP ;

Martins, JL .

JOURNAL OF APPLIED PHYSICS, 2002, 91 (10) :8296-8298

[6] Issues in heat-assisted perpendicular recording [J].

McDaniel, TW ;

Challener, WA ;

Sendur, K .

IEEE TRANSACTIONS ON MAGNETICS, 2003, 39 (04) :1972-1979

[7] Coercivity exceeding 100 kOe in epitaxially grown FePt sputtered films [J].

Shima, T ;

Takanashi, K ;

Takahashi, YK ;

Hono, K .

APPLIED PHYSICS LETTERS, 2004, 85 (13) :2571-2573

[8] Coupled granular/continuous medium for thermally stable perpendicular magnetic recording [J].

Sonobe, Y ;

Weller, D ;

Ikeda, Y ;

Takano, K ;

Schabes, ME ;

Zeltzer, G ;

Do, H ;

Yen, BK ;

Best, ME .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2001, 235 (1-3) :424-428

[9] FeRh/FePt exchange spring films for thermally assisted magnetic recording media [J].

Thiele, JU ;

Maat, S ;

Fullerton, EE .

APPLIED PHYSICS LETTERS, 2003, 82 (17) :2859-2861

[10]

Wang JP, 2005, NAT MATER, V4, P191, DOI 10.1038/nmat1344