中国物理B ›› 2008, Vol. 17 ›› Issue (10): 3907-3909.doi: 10.1088/1674-1056/17/10/058

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Magnetic properties of soft layer/FePt--MgO exchange coupled composite perpendicular recording media

阴津华1, 潘礼庆1, Takao Suzuki2   

  1. (1)Department of Physics, University of Science and Technology Beijing, Beijing 100083, China; (2)Information Storage Materials Laboratory, Toyota Technological Institute, 2-12-1, Hisakata, Tempaku-ku, Nagoya 468-8511, Japan
  • 收稿日期:2008-04-17 修回日期:2008-05-13 出版日期:2008-10-20 发布日期:2008-10-20
  • 基金资助:
    Project supported by the Japanese Storage Research Consortium (SRC) and the Grant-in-Aid for Scientific Research (A) of the Japanese Ministry of Education, Culture, Sports, Science and Technology (Grant No 14205049).

Magnetic properties of soft layer/FePt--MgO exchange coupled composite perpendicular recording media

Yin Jin-Hua(阴津华)a)†, Takao Suzukib), and Pan Li-Qing(潘礼庆)a)   

  1. a Department of Physics, University of Science and Technology Beijing, Beijing 100083, China; b Information Storage Materials Laboratory, Toyota Technological Institute, 2-12-1, Hisakata, Tempaku-ku, Nagoya 468-8511, Japan
  • Received:2008-04-17 Revised:2008-05-13 Online:2008-10-20 Published:2008-10-20
  • Supported by:
    Project supported by the Japanese Storage Research Consortium (SRC) and the Grant-in-Aid for Scientific Research (A) of the Japanese Ministry of Education, Culture, Sports, Science and Technology (Grant No 14205049).

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摘要： The magnetic properties of exchange coupled composite (ECC) media that are composed of perpendicular magnetic recording media FePt--MgO and two kinds of soft layers have been studied by using an x-ray diffractometer, a polar Kerr magneto-optical system (PMOKE) and a vibrating sample magnetometer (VSM). The results show that ECC media can reduce the coercivities of perpendicular magnetic recording media FePt--MgO. The ECC media with granular-type soft layers have weaker exchange couplings between magnetic grains and the magnetization process, for ECC media of this kind mainly follow the Stoner--Wohlfarth model.

Abstract: The magnetic properties of exchange coupled composite (ECC) media that are composed of perpendicular magnetic recording media FePt--MgO and two kinds of soft layers have been studied by using an x-ray diffractometer, a polar Kerr magneto-optical system (PMOKE) and a vibrating sample magnetometer (VSM). The results show that ECC media can reduce the coercivities of perpendicular magnetic recording media FePt--MgO. The ECC media with granular-type soft layers have weaker exchange couplings between magnetic grains and the magnetization process, for ECC media of this kind mainly follow the Stoner--Wohlfarth model.

Key words: exchange coupled composite media, perpendicular magnetic recording media, magnetic properties

中图分类号:  (Magnetization curves, hysteresis, Barkhausen and related effects)

  • 75.60.Ej
75.50.Ss (Magnetic recording materials) 78.20.Ls (Magneto-optical effects) 75.50.Vv (High coercivity materials) 75.70.Cn (Magnetic properties of interfaces (multilayers, superlattices, heterostructures))