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

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Title:	Response and enhancement of surface magneto-optic Kerr effect for Co-Pt(111) ultrathin films and surface alloy
Authors:	Shern C.S. Tsay J.S. Her H.Y. Wu Y.E. Chen R.H. 吳月娥沈青嵩何慧瑩
Contributors:	臺北市立教育大學自然科學系
Keywords:	Auger electron spectroscopy (AES) Cobalt Low-energy electron diffraction (LEED) Low index single crystal surfaces Magnetic films Platinum Surface magneto-optic Kerr effect (SMOKE)
Date:	1999
Issue Date:	2009-07-27 14:40:41 (UTC+8)
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 magneto-optic Kerr signal was observed after one atomic layer of Co adatoms on the flat Pt(111) surface was annealed at 710K. 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.
Relation:	Surface Science, V429(1), p.497-502(6)
Appears in Collections:	[Department of Applied Physics and Chemistry] Periodical Articles

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