Role of Ru vacancies in the magnetism of strain relaxed SrRuO3 films on SrTiO3 substrates

被引：18
|
作者：
Bohra, Murtaza [1 ]
Wu, C. P.
Yeh, H. J.
Cheng, Y. H.
Peng, C. C.
Chou, H.
机构：
[1] Natl Sun Yat Sen Univ, Dept Phys, Kaohsiung 804, Taiwan
来源：
JOURNAL OF APPLIED PHYSICS | 2011年 / 109卷 / 07期
关键词：
D O I：
10.1063/1.3561768
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Magnetic properties of Ru-deficient strain relaxed SrRuO3 films have been investigated. The ferromagnetic transitions drop off from 138 to 100 K with expansion of unit cell volume due to the Ru vacancies. A secondary transition starts appearing near to the bulk transition temperature of 155 K, indicating the two different Ru-deficient regions which result in an exchange structure. Anomalous variation of the saturation magnetization with the unit cell volume could be originated from the stabilization of the high spin Ru+4 states due to the Ru-vacancy and the induced crystal lattice distortions from c/a > 1 to c/a < 1. (c) 2011 American Institute of Physics. [doi: 10.1063/1.3561768]
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页数：3
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