Spin-charge-orbital coupling in multiferroic LuFe2O4 thin films

被引：26
|
作者：
Rai, R. C. [1 ]
Delmont, A. [1 ]
Sprow, A. [1 ]
Cai, B. [2 ]
Nakarmi, M. L. [2 ]
机构：
[1] SUNY Coll Buffalo, Dept Phys, Buffalo, NY 14222 USA
[2] CUNY Brooklyn Coll, Dept Phys, Brooklyn, NY 11210 USA
来源：
APPLIED PHYSICS LETTERS | 2012年 / 100卷 / 21期
关键词：
SYSTEM LUFE2O4;
D O I：
10.1063/1.4720401
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report optical, electronic, and electrical properties of LuFe2O4 thin films deposited on (001) sapphire and (111) YSZ substrates by electron beam deposition. The absorption spectra of LuFe2O4 thin films contain several electronic transitions above its direct energy band gap of similar to 2.18 eV at 300 K. The Fe2+ d to d on-site and O 2p to Fe 3d charge-transfer electronic transitions display a ferrimagnetic transition at similar to 235 +/- 5K and the charge-ordered transition at similar to 350 +/- 10K. Resistivity and the energy band gap also exhibit the two transitions, confirming a strong spin-charge-orbital coupling in the LuFe2O4 thin film. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4720401]
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页数：4
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