Multipole effects in non-Kramers doublet system PrMg3

K. Araki, T. Yoshikawa, M. Akatsu, I. Ishii, Y. Nemoto, T. Goto, H. S. Suzuki, H. Tanida, S. Takagi, B. Lüthi

研究成果: Article査読

1 被引用数 (Scopus)

抄録

We performed ultrasonic measurements on a single crystal of PrMg3. The characteristic Curie-type softening was observed in temperature dependence of transverse mode (C11 - C12) / 2 below 8 K down to 0.8 K. This softening in PrMg3 is caused by a non-Kramers Γ3 doublet ground state having electric quadrupoles Ou and Ov and magnetic octupole Txyz. The elastic constant (C11 - C12) / 2 shows a minimum at 25 K, which cannot be explained by the quadrupole susceptibility based on the crystal electric field (CEF) levels. However, considering higher order (l = 4) multipole, namely electric hexadecapole, the minimum around 25 K was well reproduced. At lower temperatures, a shoulder anomaly in elastic constant being deviated from the Curie-type softening was observed around 100-800 mK in (C11 - C12) / 2. This anomaly is unaffected by magnetic fields up to 14 T.

本文言語English
ページ(範囲)3187-3190
ページ数4
ジャーナルPhysica B: Condensed Matter
404
19
DOI
出版ステータスPublished - 2009 10月 15
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • 電子工学および電気工学

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