Irradiation induced ferromagnetism at room temperature in TiO2 thin films: X-ray magnetic circular dichroism characterizations

被引：36
|
作者：
Thakur, Hardeep [1 ]
Thakur, P. [2 ]
Kumar, Ravi [3 ]
Brookes, N. B. [2 ]
Sharma, K. K. [1 ]
Singh, A. P. [4 ]
Kumar, Yogesh [4 ]
Gautam, S. [5 ]
Chae, K. H. [5 ]
机构：
[1] Natl Inst Technol, Dept Phys, Hamirpur 177005, India
[2] European Synchrotron Radiat Facil, F-38043 Grenoble, France
[3] Natl Inst Technol, Ctr Mat Sci & Engn, Hamirpur 177005, India
[4] Interuniv Accelerator Ctr, Div Mat Sci, New Delhi 110067, India
[5] Korea Inst Sci & Technol, Nano Anal Ctr, Seoul 136791, South Korea
来源：
APPLIED PHYSICS LETTERS | 2011年 / 98卷 / 19期
关键词：
HEAVY-IONS; ABSORPTION; TITANIUM;
D O I：
10.1063/1.3592250
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report on the room temperature ferromagnetism in the swift heavy ion (SHI) irradiated TiO2 thin films by x-ray absorption spectroscopy (XAS) and x-ray magnetic circular dichroism (XMCD) experiments at the O K and Ti L-3,(2) absorption edges. The XAS/XMCD measurements provide direct evidence of magnetic polarization of the O 2p and Ti 3d orbitals. The unquenched orbital magnetic moment within the O 2p shell is ferromagnetically coupled to the neighboring Ti moments, which illustrates the intense hybridization of the O 2p and Ti 3d orbitals induced by SHI irradiation. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3592250]
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页数：3
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