L10 FePtX-Y media for heat-assisted magnetic recording

被引：190

作者：

Weller, Dieter ^{[1
]}

Mosendz, Oleksandr ^{[1
]}

Parker, Gregory ^{[1
]}

Pisana, Simone ^{[1
]}

Santos, Tiffany S. ^{[1
]}

机构：

[1] HGST, San Jose, CA 95135 USA

来源：

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2013年 / 210卷 / 07期

关键词：

grain size; granular alloys; heat assisted magnetic recording; L1(0) FePt; texture; DISORDER-ORDER TRANSFORMATION; EXCHANGE SPRING MEDIA; GRANULAR THIN-FILMS; SM-CO FILMS; EPITAXIAL-GROWTH; GRAIN-SIZE; GLASS SUBSTRATE; HIGH COERCIVITY; AG; MICROSTRUCTURE;

D O I：

10.1002/pssa.201329106

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Highly chemically ordered L1(0) FePtX-Y nano-granular films with high perpendicular magnetic anisotropy are key media approaches for future heat-assisted magnetic recording (HAMR). They are sputtered at elevated temperature on glass disks coated with adhesion, heat sink, and texturing layers. Adding X=Ag reduces the required deposition temperature and X=Cu lowers the Curie temperature. Current seed layers are NiTa for adhesion and heat sink and well-oriented MgO (002) layers for highly textured FePtX(002) grains surrounded by Y=carbon and/or other segregants. Magnetic anisotropies larger than 4.5x10(7)ergcm(-3) and coercivities beyond 5Tesla have been achieved. The combination of thermal conductivity and Curie temperature determines the required laser power during recording. Key goals are to optimize media, heads, head-disk-spacing, and read-back channels to extend the areal density to 1.5-5Tbin(-2). [GRAPHICS] Head and media in heat-assisted magnetic recording(1). LD, laser diode; TFC, thermal fluctuation control; NFT, near field transducer. (1)Lidu Huang et al., HAMR Thermal Modeling Including Media Hot Spot, APMRC 2012. (C) 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：1245 / 1260

页数：16

共 149 条

[1] Bit Patterned Media at 1 Tdot/in2 and Beyond [J].