Characteristic physical properties of the non-Kramers Γ3 ground state in PrPt2Cd20

Yusuke Hirose, Tetsuya Takeuchi, Hiroshi Doto, Fuminori Honda, Atsushi Miyake, Masashi Tokunaga, Daichi Yoshizawa, Takanori Kida, Masayuki Hagiwara, Yoshinori Haga, Rikio Settai

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2 Citations (Scopus)

Abstract

The 4 f crystalline electric field (CEF) of the Pr 3+ ion of PrPt2Cd20 with a cubic crystal structure has been studied by measuring its high-field magnetization up to 45 T, specific heat in a wide temperature range in magnetic fields, and electrical resistivity. Magnetization curves for the magnetic field along the [100] and [110] directions show metamagnetic-like features at approximately 1.5 and 15 T, respectively. The specific heat shows a Schottky peak centered at 2.4 K. These experimental results were explained well by the CEF scheme with the non-Kramers Γ3 doublet ground state with a small overall CEF splitting energy of about 40 K. The specific heat also shows another broad peak below 1 K with an associated entropy release of R ln 2. This peak was interpreted by a split of the Γ3 doublet ground state with an energy of Δ = 0.4 K. These results suggest that the local symmetry of the Pr site is lowered from a cubic one. The possible reasons for this symmetry lowering are discussed.

Original languageEnglish
Article number074711
Journaljournal of the physical society of japan
Volume86
Issue number7
DOIs
Publication statusPublished - 2017 Jul 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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