149Sm nuclear forward scattering of Sm4Bi3 under high pressure

被引：0
|
作者：
Kobayashi, Hisao
Yoda, Yoshitaka
Shirakawa, Makoto
Ochiai, Akira
机构：
[1] Univ Hyogo, Grad Sch Mat Sci, Akoh, Hyogo 6781297, Japan
[2] CREST JST, Saitama 3320012, Japan
[3] Japan Synchrotron Radiat Inst, Hyogo 6795198, Japan
[4] Tohoku Univ, Ctr Low Temperature Sci, Sendai, Miyagi 9808578, Japan
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2007年 / 310卷 / 02期
关键词：
Sm4Bi3; nuclear forward scattering; high pressure;
D O I：
10.1016/j.jmmm.2006.10.053
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
High-pressure 149 Sm nuclear forward scattering experiments have been performed on a mixed valence Sm4Bi3 compound which shows a charge ordering at 260 K. A pressure-induced first- order structural phase transition takes place at 2.3 GPa and 200 K. We present the. first clear experimental evidence that magnetic ordering occurs just above 120K at 3.2 GPa. This magnetic ordering temperature is much higher than that at ambient pressure. The higher magnetic ordering temperature is consistent with the occurrence of a valence change of nonmagnetic Sm (2+) ion toward magnetic Sm (3+) ion at 2.3 GPa. (c) 2006 Elsevier B. V. All rights reserved.
引用
收藏
页码：305 / 307
页数：3
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