Magnetism at spinel thin film interfaces probed through soft X-ray spectroscopy techniques

被引：12
作者：
Chopdekar, R. V. [1 ,2 ]
Liberati, M. [3 ]
Takamura, Y. [4 ]
Kourkoutis, L. F. [2 ]
Bettinger, J. S. [1 ]
Nelson-Cheeseman, B. B. [1 ]
Arenholz, E. [3 ]
Doran, A. [3 ]
Scholl, A. [3 ]
Muller, D. A. [2 ]
Suzuki, Y. [1 ]
机构：
[1] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA
[2] Cornell Univ, Sch Appl & Engn Phys, Ithaca, NY 14853 USA
[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA
[4] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2010年 / 322卷 / 19期
基金：
美国国家科学基金会;
关键词：
Spinel thinfilms; X-ray absorption spectroscopy; X-ray magnetic circular dichroism; Proximity-induced magnetism; CATION DISTRIBUTION; MAGNETORESISTANCE; SUPERLATTICES; MULTILAYERS; JUNCTIONS; BILAYERS; FE3O4; BEHAVIOR; ORDER; LAYER;
D O I：
10.1016/j.jmmm.2010.05.005
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Magnetic order and coupling at the interfaces of highly spin polarized Fe(3)O(4) heterostructures have been determined by surface sensitive and element specific soft X-ray spectroscopy and spectro-microscopy techniques. At ambient temperature, the interface between paramagnetic CoCr(2)O(4) or MnCr(2)O(4) and ferrimagnetic Fe(3)O(4) isostructural bilayers exhibits long range magnetic order of Co, Mn and Cr cations which cannot be explained in terms of the formation of interfacial MnFe(2)O(4) or CoFe(2)O(4). Instead, the ferrimagnetism is induced by the adjacent Fe(3)O(4) layer and is the result of the stabilization of a spinel phase not achievable in bulk form. Magnetism at the interface region is observable up to 500K, far beyond the chromite bulk Curie temperature of 50-95 K. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：2915 / 2921
页数：7
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