Anisotropic Cooperative Jahn-Teller Effect and Metamagnetism in PrCu2

Rikio Settai, Shingo Araki, Parhat Ahmet, Melike Abliz, Kiyohiro Sugiyama, Yoshichika Onuki, Terutaka Goto, Hiroyuki Mitamura, Tsuneaki Goto, Shigeru Takayanagi

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

We have studied the origin of the cooperative Jahn-Teller effect and the metamagnetic transition in the orthorhombic compound PrCu2. We have determined the anisotropic ferroquadrupole phase diagram by measuring the specific heat and thermal expansion under magnetic fields. With increasing the field, the Jahn-Teller transition temperature increases slightly for the field along a- and c-axes, while it decreases intensively along the b-axis. The phase diagram can be explained quantitatively by including the quadrupolar interaction of -KJT xy> Oxy in the crystalline electric field and Zeeman Hamiltonian. The metamagnetic transition, which brings about the conversion between the easy (a)- and hard (c)-axes magnetization, has been also studied through the magnetostriction. This phenomenon is also explained quantitatively on the basis of the quadrupolar interaction of -KM 2 2> O2 2. The sign of 2 2> is found to be negative in the state where the c-axis is the hard one, while it changes from negative to positive above the metamagnetic transition field.

Original languageEnglish
Pages (from-to)636-644
Number of pages9
JournalJournal of the Physical Society of Japan
Volume67
Issue number2
Publication statusPublished - Feb 1998
Externally publishedYes

Fingerprint

Jahn-Teller effect
phase diagrams
magnetostriction
thermal expansion
transition temperature
specific heat
interactions
magnetization
expansion
electric fields
magnetic fields

Keywords

  • Cooperative Jahn-Teller effect
  • Metamagnetism
  • PrCu
  • Quadrupole ordering

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Settai, R., Araki, S., Ahmet, P., Abliz, M., Sugiyama, K., Onuki, Y., ... Takayanagi, S. (1998). Anisotropic Cooperative Jahn-Teller Effect and Metamagnetism in PrCu2 Journal of the Physical Society of Japan, 67(2), 636-644.

Anisotropic Cooperative Jahn-Teller Effect and Metamagnetism in PrCu2 . / Settai, Rikio; Araki, Shingo; Ahmet, Parhat; Abliz, Melike; Sugiyama, Kiyohiro; Onuki, Yoshichika; Goto, Terutaka; Mitamura, Hiroyuki; Goto, Tsuneaki; Takayanagi, Shigeru.

In: Journal of the Physical Society of Japan, Vol. 67, No. 2, 02.1998, p. 636-644.

Research output: Contribution to journalArticle

Settai, R, Araki, S, Ahmet, P, Abliz, M, Sugiyama, K, Onuki, Y, Goto, T, Mitamura, H, Goto, T & Takayanagi, S 1998, 'Anisotropic Cooperative Jahn-Teller Effect and Metamagnetism in PrCu2 ', Journal of the Physical Society of Japan, vol. 67, no. 2, pp. 636-644.
Settai R, Araki S, Ahmet P, Abliz M, Sugiyama K, Onuki Y et al. Anisotropic Cooperative Jahn-Teller Effect and Metamagnetism in PrCu2 Journal of the Physical Society of Japan. 1998 Feb;67(2):636-644.
Settai, Rikio ; Araki, Shingo ; Ahmet, Parhat ; Abliz, Melike ; Sugiyama, Kiyohiro ; Onuki, Yoshichika ; Goto, Terutaka ; Mitamura, Hiroyuki ; Goto, Tsuneaki ; Takayanagi, Shigeru. / Anisotropic Cooperative Jahn-Teller Effect and Metamagnetism in PrCu2 In: Journal of the Physical Society of Japan. 1998 ; Vol. 67, No. 2. pp. 636-644.
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