A study on Hc-enhancement in Co-modified γ-Fe2O3

A. Bensaoula; C. W. Chu; P. H. Hor; A. Ignatiev; J. S. Liu; R. L. Meng; A. Mesarwi; J. Richardson; C. S. Ting; Y. Q. Wang; J. Wolfe

doi:10.1016/0304-8853(86)90983-2

A study on H_c-enhancement in Co-modified γ-Fe₂O₃

A. Bensaoula, C. W. Chu, P. H. Hor, A. Ignatiev, J. S. Liu, R. L. Meng, A. Mesarwi, J. Richardson, C. S. Ting, Y. Q. Wang, J. Wolfe

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Abstract

We have investigated the effects of valence states and Co-distributions on the coercivity of particulate and thin film Co-treated γ-Fe₂O₃. A maximum H_c of 2 kOe has been obtained in thin films prepared by a new simple method. We found that Co-ions exist in the divalent states probably in the form of ferromagnetic CoFe₂O₄ and that simple CoO to γ-Fe₂O₃ interfaces do not appear to enhance H_c. On the other hand, we observed complex diffused interfaces in a thin film sample with enhanced H_c. The diffused interfaces may be responsible for the H_c-enhancement in Co-modified γ-Fe₂O₃ recording media.

Original language	English
Pages (from-to)	1697-1698
Number of pages	2
Journal	Journal of Magnetism and Magnetic Materials
Volume	54-57
Issue number	PART 3
DOIs	https://doi.org/10.1016/0304-8853(86)90983-2
Publication status	Published - 1986 Feb

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1016/0304-8853(86)90983-2

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@article{81896f91488a4a78b4218f5e7b904f9e,

title = "A study on Hc-enhancement in Co-modified γ-Fe2O3",

abstract = "We have investigated the effects of valence states and Co-distributions on the coercivity of particulate and thin film Co-treated γ-Fe2O3. A maximum Hc of 2 kOe has been obtained in thin films prepared by a new simple method. We found that Co-ions exist in the divalent states probably in the form of ferromagnetic CoFe2O4 and that simple CoO to γ-Fe2O3 interfaces do not appear to enhance Hc. On the other hand, we observed complex diffused interfaces in a thin film sample with enhanced Hc. The diffused interfaces may be responsible for the Hc-enhancement in Co-modified γ-Fe2O3 recording media.",

author = "A. Bensaoula and Chu, {C. W.} and Hor, {P. H.} and A. Ignatiev and Liu, {J. S.} and Meng, {R. L.} and A. Mesarwi and J. Richardson and Ting, {C. S.} and Wang, {Y. Q.} and J. Wolfe",

note = "Funding Information: We would like to thank Dr. R. White of Control Data Corporationfo r suggestintgh e problem.T he work is supportedin part by NSF Grant No. DMR 8204173. and NROP Grant and Special University Funds of the Universityo f Houston.",

year = "1986",

month = feb,

doi = "10.1016/0304-8853(86)90983-2",

language = "English",

volume = "54-57",

pages = "1697--1698",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier",

number = "PART 3",

}

TY - JOUR

T1 - A study on Hc-enhancement in Co-modified γ-Fe2O3

AU - Bensaoula, A.

AU - Chu, C. W.

AU - Hor, P. H.

AU - Ignatiev, A.

AU - Liu, J. S.

AU - Meng, R. L.

AU - Mesarwi, A.

AU - Richardson, J.

AU - Ting, C. S.

AU - Wang, Y. Q.

AU - Wolfe, J.

N1 - Funding Information: We would like to thank Dr. R. White of Control Data Corporationfo r suggestintgh e problem.T he work is supportedin part by NSF Grant No. DMR 8204173. and NROP Grant and Special University Funds of the Universityo f Houston.

PY - 1986/2

Y1 - 1986/2

N2 - We have investigated the effects of valence states and Co-distributions on the coercivity of particulate and thin film Co-treated γ-Fe2O3. A maximum Hc of 2 kOe has been obtained in thin films prepared by a new simple method. We found that Co-ions exist in the divalent states probably in the form of ferromagnetic CoFe2O4 and that simple CoO to γ-Fe2O3 interfaces do not appear to enhance Hc. On the other hand, we observed complex diffused interfaces in a thin film sample with enhanced Hc. The diffused interfaces may be responsible for the Hc-enhancement in Co-modified γ-Fe2O3 recording media.

AB - We have investigated the effects of valence states and Co-distributions on the coercivity of particulate and thin film Co-treated γ-Fe2O3. A maximum Hc of 2 kOe has been obtained in thin films prepared by a new simple method. We found that Co-ions exist in the divalent states probably in the form of ferromagnetic CoFe2O4 and that simple CoO to γ-Fe2O3 interfaces do not appear to enhance Hc. On the other hand, we observed complex diffused interfaces in a thin film sample with enhanced Hc. The diffused interfaces may be responsible for the Hc-enhancement in Co-modified γ-Fe2O3 recording media.

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U2 - 10.1016/0304-8853(86)90983-2

DO - 10.1016/0304-8853(86)90983-2

M3 - Article

AN - SCOPUS:0022008672

SN - 0304-8853

VL - 54-57

SP - 1697

EP - 1698

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - PART 3

ER -

A study on H_c-enhancement in Co-modified γ-Fe₂O₃

Abstract

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