Effect of grain size on intergranular magnetostatic coupling in thin-film media

Haruhito Mitsuya; Atsushi Endo; Akira Kikuchi; Junichi Nakai; Hiroki Shoji; Migaku Takahashi

doi:10.1063/1.364746

Effect of grain size on intergranular magnetostatic coupling in thin-film media

Haruhito Mitsuya, Atsushi Endo, Akira Kikuchi, Junichi Nakai, Hiroki Shoji, Migaku Takahashi

Research output: Contribution to journal › Article › peer-review

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Abstract

In order to characterize the intergranular coupling and to clarify the effect of grain size on intergranular magnetostatic coupling in thin-film media, the temperature dependences of magnetic properties H_c, H_k^grain, and M_s, for ultraclean-(UC)-processed CoCrTa media with various grain sizes have been examined in order to discuss the effect of grain size on intergranular magnetostatic coupling. The results are that (1) in the UC-processed media, the magnetostatic coupling mode is found to be dominant as the intergranular coupling and in the normal processed media, the exchange coupling mode is dominant, and (2) the decrease in 4πM_s/H_k^grain below 1.0 is the most effective to suppress the increment in the magnetostatic coupling due to the reduction in the grain size, were clarified.

Original language	English
Pages (from-to)	4680-4682
Number of pages	3
Journal	Journal of Applied Physics
Volume	81
Issue number	8 PART 2A
DOIs	https://doi.org/10.1063/1.364746
Publication status	Published - 1997 Apr 15

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1063/1.364746

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title = "Effect of grain size on intergranular magnetostatic coupling in thin-film media",

abstract = "In order to characterize the intergranular coupling and to clarify the effect of grain size on intergranular magnetostatic coupling in thin-film media, the temperature dependences of magnetic properties Hc, Hkgrain, and Ms, for ultraclean-(UC)-processed CoCrTa media with various grain sizes have been examined in order to discuss the effect of grain size on intergranular magnetostatic coupling. The results are that (1) in the UC-processed media, the magnetostatic coupling mode is found to be dominant as the intergranular coupling and in the normal processed media, the exchange coupling mode is dominant, and (2) the decrease in 4πMs/Hkgrain below 1.0 is the most effective to suppress the increment in the magnetostatic coupling due to the reduction in the grain size, were clarified.",

author = "Haruhito Mitsuya and Atsushi Endo and Akira Kikuchi and Junichi Nakai and Hiroki Shoji and Migaku Takahashi",

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T1 - Effect of grain size on intergranular magnetostatic coupling in thin-film media

AU - Mitsuya, Haruhito

AU - Endo, Atsushi

AU - Kikuchi, Akira

AU - Nakai, Junichi

AU - Shoji, Hiroki

AU - Takahashi, Migaku

PY - 1997/4/15

Y1 - 1997/4/15

N2 - In order to characterize the intergranular coupling and to clarify the effect of grain size on intergranular magnetostatic coupling in thin-film media, the temperature dependences of magnetic properties Hc, Hkgrain, and Ms, for ultraclean-(UC)-processed CoCrTa media with various grain sizes have been examined in order to discuss the effect of grain size on intergranular magnetostatic coupling. The results are that (1) in the UC-processed media, the magnetostatic coupling mode is found to be dominant as the intergranular coupling and in the normal processed media, the exchange coupling mode is dominant, and (2) the decrease in 4πMs/Hkgrain below 1.0 is the most effective to suppress the increment in the magnetostatic coupling due to the reduction in the grain size, were clarified.

AB - In order to characterize the intergranular coupling and to clarify the effect of grain size on intergranular magnetostatic coupling in thin-film media, the temperature dependences of magnetic properties Hc, Hkgrain, and Ms, for ultraclean-(UC)-processed CoCrTa media with various grain sizes have been examined in order to discuss the effect of grain size on intergranular magnetostatic coupling. The results are that (1) in the UC-processed media, the magnetostatic coupling mode is found to be dominant as the intergranular coupling and in the normal processed media, the exchange coupling mode is dominant, and (2) the decrease in 4πMs/Hkgrain below 1.0 is the most effective to suppress the increment in the magnetostatic coupling due to the reduction in the grain size, were clarified.

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Effect of grain size on intergranular magnetostatic coupling in thin-film media

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