Field-induced valence transition in EuPtP 1-xAs x

Akihiro Mitsuda, T. Okuma, M. Sugishima, Hirofumi Wada, K. Sato, K. Kindo

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Abstract

The ternary compound EuPtP exhibits two valence transitions at T 1 = 235 K and T 2 = 190 K. In order to examine a field-induced valence transition of Eu, we synthesized EuPtP 1-x As x compounds with 0.05 ≤ x ≤ 0.5 and studied the magnetic and valence behavior. The substitution of As for P increases the lattice volume linearly and decreases both valence transition temperatures, T 1 and T 2, in contrast to the behavior under external pressures. The magnetization process in a pulsed magnetic field revealed that EuPtP 0.5As 0.5 exhibits an onset of metamagnetic transition above 50 T with a large hysteresis, which evidences a first-order field-induced valence transition. The analysis of the magnetization curves of x = 0.5 at various temperatures has demonstrated that the field-induced transition is essentially the same as the transition induced by temperature at T 1.

Original languageEnglish
Article number2011396
JournalEuropean Physical Journal B
Volume85
Issue number2
DOIs
Publication statusPublished - Feb 1 2012

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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