Magnetic phase diagram study of ultrathin Co/Si(111) films

J. S. Tsay; Y. D. Yao; Y. Liou

doi:10.1016/S0039-6028(00)00158-8

Magnetic phase diagram study of ultrathin Co/Si(111) films

J. S. Tsay^*, Y. D. Yao, Y. Liou

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

9 Citations (Scopus)

Abstract

The magnetic properties of ultrathin Co/Si(111) films were studied by the surface magneto-optic Kerr effect technique. A magnetic phase diagram has been successfully established between 120 and 500 K. Several phases were observe, i.e. a nonferromagnetic Co-Si compound, a low Curie temperature Co film, canted out-of-plane anisotropy, and in-plane anisotropy. The nonferromagnetic Co-Si compound can be reduced by decreasing the substrate temperature. With an Ag buffer layer, the thermal stability of the magnetization for a Co/Si(111) film is lowered. From Auger electron spectroscopy measurement, Ag atoms in the Co/Ag/Si(111) film segregate to top layers even below 350 K. The segregation of Ag atoms to the top layer may damage the magnetic domains in the Co layer and causes the lower thermal stability of the magnetization in the Co/Ag/Si(111) film.

Original language	English
Pages (from-to)	856-859
Number of pages	4
Journal	Surface Science
Volume	454
Issue number	1
DOIs	https://doi.org/10.1016/S0039-6028(00)00158-8
Publication status	Published - 2000 May 20
Externally published	Yes
Event	ECOSS-18: 18th European Conference on Surface Science - Vienna, Austria Duration: 1999 Sept 21 → 1999 Sept 24

ASJC Scopus subject areas

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/S0039-6028(00)00158-8

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title = "Magnetic phase diagram study of ultrathin Co/Si(111) films",

abstract = "The magnetic properties of ultrathin Co/Si(111) films were studied by the surface magneto-optic Kerr effect technique. A magnetic phase diagram has been successfully established between 120 and 500 K. Several phases were observe, i.e. a nonferromagnetic Co-Si compound, a low Curie temperature Co film, canted out-of-plane anisotropy, and in-plane anisotropy. The nonferromagnetic Co-Si compound can be reduced by decreasing the substrate temperature. With an Ag buffer layer, the thermal stability of the magnetization for a Co/Si(111) film is lowered. From Auger electron spectroscopy measurement, Ag atoms in the Co/Ag/Si(111) film segregate to top layers even below 350 K. The segregation of Ag atoms to the top layer may damage the magnetic domains in the Co layer and causes the lower thermal stability of the magnetization in the Co/Ag/Si(111) film.",

author = "Tsay, {J. S.} and Yao, {Y. D.} and Y. Liou",

note = "Funding Information: This work was supported by the National Science Council of ROC under Grant No. NSC 88-2112-M-001-038. One of the authors (J.S. Tsay) acknowledges support from the Alexander von Humboldt Foundation.; ECOSS-18: 18th European Conference on Surface Science ; Conference date: 21-09-1999 Through 24-09-1999",

year = "2000",

month = may,

day = "20",

doi = "10.1016/S0039-6028(00)00158-8",

language = "English",

volume = "454",

pages = "856--859",

journal = "Surface Science",

issn = "0039-6028",

publisher = "Elsevier",

number = "1",

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TY - JOUR

T1 - Magnetic phase diagram study of ultrathin Co/Si(111) films

AU - Tsay, J. S.

AU - Yao, Y. D.

AU - Liou, Y.

N1 - Funding Information: This work was supported by the National Science Council of ROC under Grant No. NSC 88-2112-M-001-038. One of the authors (J.S. Tsay) acknowledges support from the Alexander von Humboldt Foundation.

PY - 2000/5/20

Y1 - 2000/5/20

N2 - The magnetic properties of ultrathin Co/Si(111) films were studied by the surface magneto-optic Kerr effect technique. A magnetic phase diagram has been successfully established between 120 and 500 K. Several phases were observe, i.e. a nonferromagnetic Co-Si compound, a low Curie temperature Co film, canted out-of-plane anisotropy, and in-plane anisotropy. The nonferromagnetic Co-Si compound can be reduced by decreasing the substrate temperature. With an Ag buffer layer, the thermal stability of the magnetization for a Co/Si(111) film is lowered. From Auger electron spectroscopy measurement, Ag atoms in the Co/Ag/Si(111) film segregate to top layers even below 350 K. The segregation of Ag atoms to the top layer may damage the magnetic domains in the Co layer and causes the lower thermal stability of the magnetization in the Co/Ag/Si(111) film.

AB - The magnetic properties of ultrathin Co/Si(111) films were studied by the surface magneto-optic Kerr effect technique. A magnetic phase diagram has been successfully established between 120 and 500 K. Several phases were observe, i.e. a nonferromagnetic Co-Si compound, a low Curie temperature Co film, canted out-of-plane anisotropy, and in-plane anisotropy. The nonferromagnetic Co-Si compound can be reduced by decreasing the substrate temperature. With an Ag buffer layer, the thermal stability of the magnetization for a Co/Si(111) film is lowered. From Auger electron spectroscopy measurement, Ag atoms in the Co/Ag/Si(111) film segregate to top layers even below 350 K. The segregation of Ag atoms to the top layer may damage the magnetic domains in the Co layer and causes the lower thermal stability of the magnetization in the Co/Ag/Si(111) film.

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U2 - 10.1016/S0039-6028(00)00158-8

DO - 10.1016/S0039-6028(00)00158-8

M3 - Conference article

AN - SCOPUS:0033687885

SN - 0039-6028

VL - 454

SP - 856

EP - 859

JO - Surface Science

JF - Surface Science

IS - 1

T2 - ECOSS-18: 18th European Conference on Surface Science

Y2 - 21 September 1999 through 24 September 1999

ER -

Magnetic phase diagram study of ultrathin Co/Si(111) films

Abstract

ASJC Scopus subject areas

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