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QUADRUPOLE-STRAIN INTERACTION IN RARE-EARTH HEXABORIDES

被引：134
作者：
NAKAMURA, S
GOTO, T
KUNII, S
IWASHITA, K
TAMAKI, A
机构：
[1] TOKYO DENKI UNIV, DEPT APPL SCI, TOKYO 101, JAPAN
[2] TOHOKU UNIV, DEPT PHYS, SENDAI, MIYAGI 980, JAPAN
来源：
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1994年 / 63卷 / 02期
关键词：
QUADRUPOLE-STRAIN INTERACTION; RARE EARTH HEXABORIDES; ULTRASOUND; QUADRUPOLAR MOMENT; QUADRUPOLAR RESPONSE; DENSE KONDO EFFECT; VALENCE FLUCTUATION;
D O I：
10.1143/JPSJ.63.623
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Temperature dependence of the elastic constants in a series of rare earth hexaborides has been investigated by means of the ultrasonic method. The remarkable softening of the transverse C44 mode in PrB6, NdB6, DyB6 and HoB6 has been discussed in connection with the cooperative Jahn-Teller effect due to the CEF ground state degenerated by the quadrupolar moment. The low temperature behavior of C44 in CexLa1-xB6 compounds is presented to show the Kondo effect on the quadrupolar moment of GAMMA8 ground state. The anomaly of the bulk modulus C(B) in SMB6 is related to the valence fluctuation state in the system.
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页码：623 / 636
页数：14
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