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Content Provider | IEEE Xplore Digital Library |
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Author | Hirayama, Y. Tamai, I. Takekuma, I. Nishida, Y. Hosoe, Y. |
Copyright Year | 2003 |
Description | Author affiliation: Central Res. Lab., Hitachi Ltd., Tokyo, Japan (Hirayama, Y.; Tamai, I.; Takekuma, I.; Nishida, Y.; Hosoe, Y.) |
Abstract | CoCr-alloy perpendicular magnetic recording media have been investigated, as the Cr segregated structure in the CoCr-alloy recording layer is suitable for obtaining low noise properties. Recently, the grain size of the recording layer is required to be very small for high-density recording, therefore the thermal stability of the recorded bit is becoming a critical issue. The magnetic anisotropy should be improved to keep the thermal stability of the recording layer which consists of small grains. The addition of the Pt element and a decrease of Cr content are required in the CoCr-alloy. This, however, results in higher medium noise due to increasing inter-granular exchange coupling. In this paper, the effects of Cr content on the magnetic and recording properties in post-annealed CoCrPt-alloy perpendicular media were investigated. The post-annealing treatment is expected to enhance Cr diffusion into the CoCrPt grain boundary from a nonmagnetic CoCr intermediate layer. |
File Size | 75320 |
File Format | |
ISBN | 078037746X |
DOI | 10.1109/NAPMRC.2003.1177049 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2003-01-06 |
Publisher Place | USA |
Access Restriction | Subscribed |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Grain size Grain boundaries Perpendicular magnetic recording Magnetic anisotropy Chromium Magnetic noise Perpendicular magnetic anisotropy Thermal stability Magnetic recording Magnetic properties |
Content Type | Text |
Resource Type | Article |
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