Presentation	2004/10/28 Higher Energy Term of Magnetic Anisotropy in CoPtCr-SiO_2 Perpendicular Recording Media for High Density Recording Takehito SHIMATSU, Osamu KITAKAMI, Hajime AOI, Hiroaki MURAOKA, Yoshihisa NAKAMURA,
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Abstract(in English)	The higher energy term of magnetic anisotropy, K_, which is theoretically predicted to enhance thermal stability without a notable change in switching field, is discussed for CoPtCr-SiO_2 perpendicular recording media. It was revealed that the values of K_ (the first order energy term) and K_ vary significantly with the seed layer material used. The ratio of K_ to K_ increases as the c/a of hcp-CoPtCr lattice increases, indicating that the appearance of K_ is related to the elongation of hcp-lattice or an increase in the stacking fault density. No significant change in the value of K_/K_ was observed by the addition of SiO_2 to the CoPtCr films. It was concluded that CoPtCr films have a sufficient potential in the values of K_ and K_ for high density perpendicular media.
Keyword(in Japanese)	(See Japanese page)
Keyword(in English)	K_ / CoPtCr-SiO_2 / perpendicular recording media / magnetic anisotropy / seed layer / hcp lattice / distortion
Paper #	MR2004-21
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Conference Information
Committee	MR
Conference Date	2004/10/28(1days)
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Paper Information
Registration To	Magnetic Recording (MR)
Language	JPN
Title (in Japanese)	(See Japanese page)
Sub Title (in Japanese)	(See Japanese page)
Title (in English)	Higher Energy Term of Magnetic Anisotropy in CoPtCr-SiO_2 Perpendicular Recording Media for High Density Recording
Sub Title (in English)
Keyword(1)	K_
Keyword(2)	CoPtCr-SiO_2
Keyword(3)	perpendicular recording media
Keyword(4)	magnetic anisotropy
Keyword(5)	seed layer
Keyword(6)	hcp lattice
Keyword(7)	distortion
1st Author's Name	Takehito SHIMATSU
1st Author's Affiliation	RIEC, Tohoku University()
2nd Author's Name	Osamu KITAKAMI
2nd Author's Affiliation	IMRAM, Tohoku University
3rd Author's Name	Hajime AOI
3rd Author's Affiliation	RIEC, Tohoku University
4th Author's Name	Hiroaki MURAOKA
4th Author's Affiliation	RIEC, Tohoku University
5th Author's Name	Yoshihisa NAKAMURA
5th Author's Affiliation	RIEC, Tohoku University
Date	2004/10/28
Paper #	MR2004-21
Volume (vol)	vol.104
Number (no)	408
Page	pp.pp.-
#Pages	6
Date of Issue