Response and enhancement of surface magneto-optic Kerr effect for Co-Pt(111) ultrathin films and surface alloy

C. S. Shern; J. S. Tsay; H. Y. Her; Y. E. Wu; R. H. Chen

doi:10.1016/S0039-6028(99)00420-3

Response and enhancement of surface magneto-optic Kerr effect for Co-Pt(111) ultrathin films and surface alloy

C. S. Shern^*, J. S. Tsay, H. Y. Her, Y. E. Wu, R. H. Chen

^*Corresponding author for this work

Department of Physics

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

65 Citations (Scopus)

Abstract

Magnetic anisotropy as a function of Co coverage was comparatively studied on a flat and sputtered Pt(111) surface by a surface magneto-optic Kerr effect. The magnetic anisotropy of the flat Pt(111) surface changes gradually from out-of-plane to in-plane when the film thickness is over four monolayers, whereas both the out-of-plane and in-plane anisotropy occur on the sputtered Pt(111) surface. This difference is attributed to the fact that the magnetocrystalline anisotropy is diminished from the sputtered surface. A large enhancement in the polar magnetooptic Kerr signal was observed after one atomic layer of Co adatoms on the flat Pt(111) surface was annealed at 710 K. The formation of Co-Pt alloy at the interface following the enhancement was confirmed by low-energy electron diffraction and Auger electron spectroscopy. The mechanism of the enhancement is discussed.

Original language	English
Pages (from-to)	L497-L502
Journal	Surface Science
Volume	429
Issue number	1
DOIs	https://doi.org/10.1016/S0039-6028(99)00420-3
Publication status	Published - 1999 Jun 15

ASJC Scopus subject areas

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

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10.1016/S0039-6028(99)00420-3

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@article{e47716d63f434ee6a807cfeaa4d1d61b,

title = "Response and enhancement of surface magneto-optic Kerr effect for Co-Pt(111) ultrathin films and surface alloy",

abstract = "Magnetic anisotropy as a function of Co coverage was comparatively studied on a flat and sputtered Pt(111) surface by a surface magneto-optic Kerr effect. The magnetic anisotropy of the flat Pt(111) surface changes gradually from out-of-plane to in-plane when the film thickness is over four monolayers, whereas both the out-of-plane and in-plane anisotropy occur on the sputtered Pt(111) surface. This difference is attributed to the fact that the magnetocrystalline anisotropy is diminished from the sputtered surface. A large enhancement in the polar magnetooptic Kerr signal was observed after one atomic layer of Co adatoms on the flat Pt(111) surface was annealed at 710 K. The formation of Co-Pt alloy at the interface following the enhancement was confirmed by low-energy electron diffraction and Auger electron spectroscopy. The mechanism of the enhancement is discussed.",

author = "Shern, {C. S.} and Tsay, {J. S.} and Her, {H. Y.} and Wu, {Y. E.} and Chen, {R. H.}",

note = "Funding Information: This work was supported by the National Science Council of ROC under Grant No. NSC 88-2112-M-003-001.",

year = "1999",

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doi = "10.1016/S0039-6028(99)00420-3",

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T1 - Response and enhancement of surface magneto-optic Kerr effect for Co-Pt(111) ultrathin films and surface alloy

AU - Shern, C. S.

AU - Tsay, J. S.

AU - Her, H. Y.

AU - Wu, Y. E.

AU - Chen, R. H.

N1 - Funding Information: This work was supported by the National Science Council of ROC under Grant No. NSC 88-2112-M-003-001.

PY - 1999/6/15

Y1 - 1999/6/15

N2 - Magnetic anisotropy as a function of Co coverage was comparatively studied on a flat and sputtered Pt(111) surface by a surface magneto-optic Kerr effect. The magnetic anisotropy of the flat Pt(111) surface changes gradually from out-of-plane to in-plane when the film thickness is over four monolayers, whereas both the out-of-plane and in-plane anisotropy occur on the sputtered Pt(111) surface. This difference is attributed to the fact that the magnetocrystalline anisotropy is diminished from the sputtered surface. A large enhancement in the polar magnetooptic Kerr signal was observed after one atomic layer of Co adatoms on the flat Pt(111) surface was annealed at 710 K. The formation of Co-Pt alloy at the interface following the enhancement was confirmed by low-energy electron diffraction and Auger electron spectroscopy. The mechanism of the enhancement is discussed.

AB - Magnetic anisotropy as a function of Co coverage was comparatively studied on a flat and sputtered Pt(111) surface by a surface magneto-optic Kerr effect. The magnetic anisotropy of the flat Pt(111) surface changes gradually from out-of-plane to in-plane when the film thickness is over four monolayers, whereas both the out-of-plane and in-plane anisotropy occur on the sputtered Pt(111) surface. This difference is attributed to the fact that the magnetocrystalline anisotropy is diminished from the sputtered surface. A large enhancement in the polar magnetooptic Kerr signal was observed after one atomic layer of Co adatoms on the flat Pt(111) surface was annealed at 710 K. The formation of Co-Pt alloy at the interface following the enhancement was confirmed by low-energy electron diffraction and Auger electron spectroscopy. The mechanism of the enhancement is discussed.

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U2 - 10.1016/S0039-6028(99)00420-3

DO - 10.1016/S0039-6028(99)00420-3

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SN - 0039-6028

VL - 429

SP - L497-L502

JO - Surface Science

JF - Surface Science

IS - 1

ER -

Response and enhancement of surface magneto-optic Kerr effect for Co-Pt(111) ultrathin films and surface alloy

Abstract

ASJC Scopus subject areas

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