Elastic anomalies of UGe

Kuwahara, Keitaro*; Sakai, Takashi*; Kogi, Masafumi*; Haga, Yoshinori ; Onuki, Yoshichika

We have performed the ultrasonic sound velocity measurement on the single crystal of UGe in the temperature range 4-120 K at ambient pressure, focusing attention on the elastic behavior around the characteristic temperature $T^{*}$ = 30 K. In the elastic constants forthree modes $_{11}$ , $_{55}$ and $_{66}$ , all modes show the hardening with a kink at the Curie temperature as decreasing temperatures. We found the elastic anomaly related to $T^{*}$ in the longitudinal $_{11}$ mode. However, the anomaly around $T^{*}$ is very broad. Therefore, this result may suggest that $T^{*}$ is not related to a phase boundary of some second-order phase transition. On the other hand, no clear anomaly wasobserved around $T^{*}$ in the transverse $_{55}$ and $_{66}$ modes.

Language	:	English
Journal	:	Journal of Magnetism and Magnetic Materials
Volume	:	310
Number	:	2, Part1
Pages	:	p.362 - 364
Publication Year/Month	:	2007/03
Meeting title	:	17th International Conference on Magnetism (ICM 2006)
Held date	:	2006/08
Location (city)	:	Kyoto
Location (country)	:	Japan
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Keywords	:	no keyword
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Cooperating Institute	:	首都大学東京

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Registration No. : BB20071357
JAEA Abstracts No. : 35001319
Paper Submission No. : 2900

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