Magnetic and structural properties of CoCrTaNiPt longitudinal thin-film media

Satoru Yoshimura, D. D. Djayaprawira, Hiroki Shoji, Migaku Takahashi

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

The effects of Ni addition on magnetic and structural properties of CoCrTaNiPt/Cr longitudinal media fabricated under the UC process have been investigated. It is found that the addition of Ni up to 13 at. % increases the magnetocrystalline anisotropy field of grain Hgraink by 10%, and decreases the saturation magnetization Ms by 20%. As a result, coercivity Hc increases by 10%-15% and the ratio of the saturation flux density to anisotropy field 4 πMs/Hgraink decreases by 30%. Further addition of Ni from 13 to 19 at. % results in a decrease of Hc by 7% and a decrease of Hc/Hgraink from 0.38 to 0.36. This is due to the degraded grain-boundary structure and the increase of the stacking fault density. The addition of Ni up to 13 at. % is effective in increasing Hgraink and decreasing 4 πMs/Hgraink, while retaining a high Hc/Hgraink value of about 0.38. As a result, Hc as high as 3.2 kOe is obtained even when using an isotropic NiP/Al substrate.

Original languageEnglish
Pages (from-to)6866-6868
Number of pages3
JournalJournal of Applied Physics
Volume87
Issue number9 III
DOIs
Publication statusPublished - 2000 May 1
Externally publishedYes
Event44th Annual Conference on Magnetism and Magnetic Materials - San Jose, CA, United States
Duration: 1999 Nov 151999 Nov 18

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Yoshimura, S., Djayaprawira, D. D., Shoji, H., & Takahashi, M. (2000). Magnetic and structural properties of CoCrTaNiPt longitudinal thin-film media. Journal of Applied Physics, 87(9 III), 6866-6868. https://doi.org/10.1063/1.372868