Anomalous ferromagnetic ordering in EuCuP

Wataru Iha, Masashi Kakihana, Shinya Matsuda, Fuminori Honda, Yoshinori Haga, Tetsuya Takeuchi, Miho Nakashima, Yasushi Amako, Jun Gouchi, Yoshiya Uwatoko, Masato Hedo, Takao Nakama, Yoshichika Ōnuki

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We succeeded in growing single crystals of EuCuP with the hexagonal structure by the Sn-flux method and measured the electrical resistivity, specific heat, magnetic susceptibility, magnetization, thermal expansion, and Hall effect, together with the electrical resistivity under pressure and magnetic field. EuCuP is a ferromagnet with a Curie temperature TC=32 K, following a divalent electronic state, although the temperature dependence of the electrical resistivity is not simple but possesses a sharp and distinct peak at TC. The Curie temperature is found to increase continuously with increasing pressure P, with a large rate of dTC/dP=5.7 K/GPa up to 8 GPa. This means that the divalent electronic state is stable up to 8 GPa. The present resistivity peak at TC is, however, extremely suppressed by magnetic field, and is found to be characteristic in a ferromagnet with a small number of carriers, which was confirmed from a measurement of the Hall effect.

Original languageEnglish
Pages (from-to)361-366
Number of pages6
JournalJournal of Alloys and Compounds
Volume788
DOIs
Publication statusPublished - 2019 Jun 5

Keywords

  • EuCuP
  • Ferromagnet
  • Magnetic field
  • Pressure
  • Single crystal
  • Sn-flux method

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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