Fine metallic particles for magnetic domain observations

被引：38

作者：

Kitakami, O ^{[1
]}

Sakurai, T ^{[1
]}

Miyashita, Y ^{[1
]}

Takeno, Y ^{[1
]}

Shimada, Y ^{[1
]}

Takano, H ^{[1
]}

Awano, H ^{[1
]}

Ando, K ^{[1
]}

Sugita, Y ^{[1
]}

机构：

[1] HITACHI LTD,CENT RES LAB,KOKUBUNJI,TOKYO 185,JAPAN

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1996年 / 35卷 / 03期

关键词：

domain observation; fine particle; single-domain particle; superparamagnetic particle;

D O I：

10.1143/JJAP.35.1724

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Fine domain structures of a ferromagnetic specimen can be visualized by deposition of ultrafine ferromagnetic particles onto its surface. We have applied various ferromagnetic particles, such as Co, Fe, Co-Fe alloy and Permalloy, to observation of high-density recording states of thin-film recording media. These studies have revealed that single-domain particles mainly contribute to the domain pattern contrast, while very small superparamagnetic particles are so insensitive to the leakage field from the recording media that they deteriorate the image quality of the domain patterns, Therefore, suppressing the formation of the superparamagnetic particles is effective in improving the resolution and the image quality of the observed domain patterns. In order to suppress the formation of superparamagnetic particles, we have attempted to synthesize hcp-Co particles with large uniaxial anisotropy by alloying Co with some elements which increase the fcc double left right arrow hcp transformation temperature, but all the Co and Co-alloy particles exhibit a pure high-temperature fcc phase.

引用

页码：1724 / 1728

页数：5

共 19 条

[1] BEAN CP, 1959, J APPL PHYS, V30, pS120, DOI [DOI 10.1063/1.2185850, DOI 10.1063/1.1735100]
[2] CRITERION FOR UNIFORM MICROMAGNETIZATION
BROWN, WF
[J]. PHYSICAL REVIEW, 1957, 105 (05): : 1479 - 1482
[3] Imperfections in the structure of cobalt I. Experimental work and proposed structure
Edwards, OS
Lipson, H
[J]. PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1942, 180 (A982) : 0268 - 0277
[4] FUKATSU T, 1959, POWDER POWDER METALL, V6, P185
[5] GRANQVIST CG, 1976, J APPL PHYS, V47, P2201
[6] Kimoto K., 1963, JPN J APPL PHYS, V2, P702, DOI 10.1143/JJAP.2.702
[7] A CONVENIENT METHOD FOR ESTIMATING THE INCLINATION OF RECORDED MAGNETIZATION USING THE BITTER TECHNIQUE
KITAKAMI, O
[J]. JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS, 1991, 30 (4B): : L739 - L741
[8] THEORY OF THE STRUCTURE OF FERROMAGNETIC DOMAINS IN FILMS AND SMALL PARTICLES
KITTEL, C
[J]. PHYSICAL REVIEW, 1946, 70 (11-1): : 965 - 971
[9] MEE CD, 1964, PHYSICS MAGNETIC REC
[10] OBSERVATION OF HIGH-DENSITY RECORDING STATES USING MAGNETIC FINE PARTICLES MADE BY SPUTTERING METHOD
SAKURAI, T
KITAKAMI, O
SHIMADA, Y
[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1994, 130 (1-3) : 384 - 390

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