On the interface magnetism of thin oxidized Co films: orbital and spin moments

被引:13
作者
Mulders, A. M. [1 ,2 ,3 ]
Loosvelt, H. [4 ]
Rodriguez, A. Fraile [1 ,5 ]
Popova, E. [4 ,6 ]
Konishi, T. [7 ]
Temst, K. [4 ]
Karis, O. [1 ]
Arvanitis, D. [1 ]
Van Haesendonck, C. [4 ]
机构
[1] Uppsala Univ, Dept Phys, S-75121 Uppsala, Sweden
[2] Curtin Univ Technol, Dept Imaging & Appl Phys, Perth, WA 6845, Australia
[3] Australian Nucl Sci & Technol Org, Bragg Inst, Lucas Heights, NSW 2234, Australia
[4] Katholieke Univ Leuven, Lab Solid State Phys & Magnetism, B-3001 Louvain, Belgium
[5] Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland
[6] Inst Magnetism NASU, UA-03142 Kiev, Ukraine
[7] Chiba Univ, Dept Chem, Fac Sci, Inage Ku, Chiba 2638522, Japan
关键词
RAY CIRCULAR-DICHROISM; EXCHANGE-BIASED CO/COO; LAYERS; MAGNETIZATION; MULTILAYERS; ANISOTROPY; BILAYERS;
D O I
10.1088/0953-8984/21/12/124211
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
An x-ray magnetic circular dichroism study of a polycrystalline Co/CoO bilayer is presented. Using both the chemical specificity and surface sensitivity in the core level techniques, we find that uncompensated Co2+ spin moments participate in the remanent ferromagnetic response of the bilayer that has oxygen nearest neighbors. These are likely located at the Co/CoO interface. As intermixing of magnetic species is not present in Co/CoO, it is concluded that the observed interface moments are due to interface roughness. Given their direction, these moments appear to not directly correlate to the exchange bias in these bilayers.
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页数:6
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