Structural origin of magnetic anisotropy in Co-Pt alloy films probed by polarized XAFS

被引：42
作者：
Meneghini, C
Maret, M
Parasote, V
Cadeville, MC
Hazemann, JL
Cortes, R
Colonna, S
机构：
[1] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy
[2] Inst Phys & Chim Mat Strasbourg, GEMM, ULP, CNRS,UMR 46, F-67037 Strasbourg, France
[3] CNRS, Cristallog Lab, F-38042 Grenoble, France
[4] Univ Paris 06, Lab Phys Liquides & Electrochim, CNRS, UPR 15, F-75230 Paris 05, France
[5] European Synchrotron Radiat Facil, INFM, GILDA CRG, F-38043 Grenoble, France
来源：
EUROPEAN PHYSICAL JOURNAL B | 1999年 / 7卷 / 03期
关键词：
D O I：
10.1007/s100510050621
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Polarized X-ray absorption fine structure (XAFS) measurements at the Co K and Pt L-3 edges show that the perpendicular magnetic anisotropy found in epitaxial fee CoPt3 (111) films stems from the existence of anisotropic local ordering. Such ordering, induced during the codeposition process and dependent on the growth temperature, is characterized by preferential CoCo pairs in time film plane, balanced by preferential CoPt pairs out of the planet resulting from some Co 2D-segregation. Polarized XAFS at the Pt edge reveals similar anisotropic local ordering in epitaxial hcp Co3Pt (0001) films exhihiting a larger magnetocrystalline anisotropy compared to that of bulk hcp Co. Besides, a polarization dependence of the Co XANES profile is observed only for the Co3Pt films exhibiting hcp symmetry.
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收藏
页码：347 / 357
页数：11
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