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)
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
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.
Received: 17 April 2008
Revised: 13 May 2008
Accepted manuscript online:
PACS:
75.60.Ej
(Magnetization curves, hysteresis, Barkhausen and related effects)
(Magnetic properties of interfaces (multilayers, superlattices, heterostructures))
Fund: 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).
Cite this article:
Yin Jin-Hua(阴津华), Takao Suzuki, and Pan Li-Qing(潘礼庆) Magnetic properties of soft layer/FePt--MgO exchange coupled composite perpendicular recording media 2008 Chin. Phys. B 17 3907
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