Strain-Induced Neel Temperature Enhancement in Corundum-Type Cr2O3 and Fe2O3

被引：33
|
作者：
Kota, Yohei [1 ]
Imamura, Hiroshi [1 ]
Sasaki, Munetaka [2 ]
机构：
[1] Natl Inst Adv Ind Sci & Technol, Spintron Res Ctr, Tsukuba, Ibaraki 3058568, Japan
[2] Tohoku Univ, Dept Appl Phys, Sendai, Miyagi 9808579, Japan
来源：
APPLIED PHYSICS EXPRESS | 2013年 / 6卷 / 11期
关键词：
SUPEREXCHANGE INTERACTION; MAGNETIC INTERACTIONS; ELECTRONIC-STRUCTURE; WEAK FERROMAGNETISM; SPIN WAVES; OXIDE; ANTIFERROMAGNETICS;
D O I：
10.7567/APEX.6.113007
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The effect of strain on Neel temperature in corundum-type Cr2O3 and Fe2O3 was theoretically studied. We calculated the exchange coupling constants up to the fifth-nearest neighbors using the first-principles density functional method and evaluated the Neel temperature using Monte Carlo simulation of the classical Heisenberg model. We showed that the Neel temperature is enhanced (decreased) by tensile (compressive) strain along the c-axis. The Neel temperatures of Cr2O3 and Fe2O3 are enhanced more than 20 and 7% by 5% strain of the crystal lattice, respectively. (C) 2013 The Japan Society of Applied Physics
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页数：4
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