Study of the elastic property at low temperature in La-substitution system of

✍ Scribed by Yoshiki Nakanishi; Masafumi Oikawa; Tomoaki Tanizawa; Tomoyuki Kumagai; Masahito Yoshizawa; S.R. Saha; Hitoshi Sugawara; Tomoyuki Kaneyama; Yuji Aoki; Hideyuki Sato

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 449 KB
• Volume: 378-380
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2006.01.081

✦ Synopsis

We have performed ultrasonic measurements on the filled skutterudite compound La substitution system Pr x La 1Àx Fe 4 P 12 for x ¼ 0:95. An abrupt decrease was observed below T c ¼ 1:1 K in the temperature dependence of elastic constants (C 11 -C 12 )=2 and C 44 . Besides, a pronounced dip was observed in their elastic constants around 5 K. This dip can be explained reasonably by a pseudo quartet ground state:

4 . The ground state property of Pr ion in Pr x La 1Àx Fe 4 P 12 for x ¼ 0:95 is discussed.