Unusual magnetic behaviour of hcp-Co on bcc-V, Cr, and Mo

C. K. Lo; I. Klik; C. P. Chang; Y. Liou; C. S. Yang; Y. D. Yao; J. A.C. Huang

doi:10.1016/S0169-4332(96)00788-X

Unusual magnetic behaviour of hcp-Co on bcc-V, Cr, and Mo

C. K. Lo^*, I. Klik, C. P. Chang, Y. Liou, C. S. Yang, Y. D. Yao, J. A.C. Huang

^*Corresponding author for this work

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

3 Citations (Scopus)

Abstract

Co/X (X = V, Cr, Mo) bilayers were prepared on MgO(110) by MBE. Their structure was determined, by in situ RHEED and ex situ X-ray, as hcp-Co on bcc-X(211). The Co thickness was 200 Å and X thickness varied between 6 and 100 Å. AFM images revealed surface topography characterized by oblong grains. Magnetization reversal was examined ex situ, at room temperature, by angular MOKE measurements which showed strong in-plane uniaxial anisotropy. The angular dependence of coercivity agrees well with a modified Kondoroski model, suggesting that magnetization reversal is due to domain wall motion and the squareness of the loops shows that wall pinning is virtually absent. The reversal process is consistent with an in-plane Co columnar structure and the existence of very square minor loops suggests that these columns can be switched individually.

Original language	English
Pages (from-to)	160-164
Number of pages	5
Journal	Applied Surface Science
Volume	113-114
DOIs	https://doi.org/10.1016/S0169-4332(96)00788-X
Publication status	Published - 1997 Apr
Externally published	Yes

Keywords

Domain wall motion
Magnetic hysteresis
Magnetic thin films

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
General Physics and Astronomy
Surfaces and Interfaces
Surfaces, Coatings and Films

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10.1016/S0169-4332(96)00788-X

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@article{d2d4ceaf9d4c4cb1bc061cec4069b185,

title = "Unusual magnetic behaviour of hcp-Co on bcc-V, Cr, and Mo",

abstract = "Co/X (X = V, Cr, Mo) bilayers were prepared on MgO(110) by MBE. Their structure was determined, by in situ RHEED and ex situ X-ray, as hcp-Co on bcc-X(211). The Co thickness was 200 {\AA} and X thickness varied between 6 and 100 {\AA}. AFM images revealed surface topography characterized by oblong grains. Magnetization reversal was examined ex situ, at room temperature, by angular MOKE measurements which showed strong in-plane uniaxial anisotropy. The angular dependence of coercivity agrees well with a modified Kondoroski model, suggesting that magnetization reversal is due to domain wall motion and the squareness of the loops shows that wall pinning is virtually absent. The reversal process is consistent with an in-plane Co columnar structure and the existence of very square minor loops suggests that these columns can be switched individually.",

keywords = "Domain wall motion, Magnetic hysteresis, Magnetic thin films",

author = "Lo, {C. K.} and I. Klik and Chang, {C. P.} and Y. Liou and Yang, {C. S.} and Yao, {Y. D.} and Huang, {J. A.C.}",

note = "Funding Information: The authors are grateful for the financial support of National Science Council of the ROC under Grant Nos. 85-2112-M-001-019, 85-2112-M-006-018, and 85-21 12-M-001-020.",

year = "1997",

month = apr,

doi = "10.1016/S0169-4332(96)00788-X",

language = "English",

volume = "113-114",

pages = "160--164",

journal = "Applied Surface Science",

issn = "0169-4332",

publisher = "Elsevier",

}

TY - JOUR

T1 - Unusual magnetic behaviour of hcp-Co on bcc-V, Cr, and Mo

AU - Lo, C. K.

AU - Klik, I.

AU - Chang, C. P.

AU - Liou, Y.

AU - Yang, C. S.

AU - Yao, Y. D.

AU - Huang, J. A.C.

N1 - Funding Information: The authors are grateful for the financial support of National Science Council of the ROC under Grant Nos. 85-2112-M-001-019, 85-2112-M-006-018, and 85-21 12-M-001-020.

PY - 1997/4

Y1 - 1997/4

N2 - Co/X (X = V, Cr, Mo) bilayers were prepared on MgO(110) by MBE. Their structure was determined, by in situ RHEED and ex situ X-ray, as hcp-Co on bcc-X(211). The Co thickness was 200 Å and X thickness varied between 6 and 100 Å. AFM images revealed surface topography characterized by oblong grains. Magnetization reversal was examined ex situ, at room temperature, by angular MOKE measurements which showed strong in-plane uniaxial anisotropy. The angular dependence of coercivity agrees well with a modified Kondoroski model, suggesting that magnetization reversal is due to domain wall motion and the squareness of the loops shows that wall pinning is virtually absent. The reversal process is consistent with an in-plane Co columnar structure and the existence of very square minor loops suggests that these columns can be switched individually.

AB - Co/X (X = V, Cr, Mo) bilayers were prepared on MgO(110) by MBE. Their structure was determined, by in situ RHEED and ex situ X-ray, as hcp-Co on bcc-X(211). The Co thickness was 200 Å and X thickness varied between 6 and 100 Å. AFM images revealed surface topography characterized by oblong grains. Magnetization reversal was examined ex situ, at room temperature, by angular MOKE measurements which showed strong in-plane uniaxial anisotropy. The angular dependence of coercivity agrees well with a modified Kondoroski model, suggesting that magnetization reversal is due to domain wall motion and the squareness of the loops shows that wall pinning is virtually absent. The reversal process is consistent with an in-plane Co columnar structure and the existence of very square minor loops suggests that these columns can be switched individually.

KW - Domain wall motion

KW - Magnetic hysteresis

KW - Magnetic thin films

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DO - 10.1016/S0169-4332(96)00788-X

M3 - Article

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SN - 0169-4332

VL - 113-114

SP - 160

EP - 164

JO - Applied Surface Science

JF - Applied Surface Science

ER -

Unusual magnetic behaviour of hcp-Co on bcc-V, Cr, and Mo

Abstract

Keywords

ASJC Scopus subject areas

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