238U Mössbauer Study on the 5f-Quadrupoles in Uranium-Based Intermetallics

被引：0
|
作者：
S. Tsutsui
M. Nakada
S. Nasu
T. Honma
Y. Tokiwa
D. Aoki
P. Wisniewski
Y. Haga
Y. Ōnuki
机构：
[1] Japan Synchrotron Radiation Research Institute,Department of Materials Science
[2] Japan Atomic Energy Research Institute,Graduate School of Engineering Science
[3] Osaka University,Advanced Science Research Center
[4] Japan Atomic Energy Research Institute,Graduate School of Science
[5] Osaka University,undefined
来源：
Hyperfine Interactions | 2002年 / 141-142卷
关键词：
Antiferromagnetic State; Phonon State; Nuclear Quadrupole Interaction; Orbital Order; Japan Atomic Energy Research Institute;
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摘要：
We have determined the distribution of the 5f-quadrupoles and detected the 5f-quadrupole order in the uranium intermetallics, uranium dipnictides and UPd3, with 238U Mössbauer spectroscopy. We have declared that the distribution of the 5f-qaudrupoles depends on the magnetic sequence in uranium dipnictides. The distribution of the 5f-quadrupole is spherical in UBi2, while those are oblate within c-plane in UP2, UAs2 and USb2. We have observed the sudden drop of the recoil-free fraction above the transition temperature of the quadrupole order in UPd3. The present result suggests the change of the phonon states due to the quadrupole order in this compound.
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页码：237 / 242
页数：5
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