Successive magnetic transitions in a frustrated compound YbAgGe

Kazunori Umeo, Kyoutarou Yamane, Yuji Muro, Kenichi Katoh, Yuzuru Niide, Akira Ochiai, Takaaki Morie, Toshiro Sakakibara, Toshiro Takabatake

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)

Abstract

Low-temperature properties of a heavy fermion compound YbAgGe have been investigated by electrical resistivity, specific heat and magnetization measurements on a single crystalline sample. This compound, crystallizing in the hexagonal ZrNiAl-type structure, undergoes two magnetic phase transitions at TMI = 0.8 K (second order) and TM2 = 0.65 K (first order). Below TM2, the jump of the resistivity along the a axis indicates gap formation on the Fermi surface along the a axis. The extremely small magnetic entropy of 0.6 J/mol K released at TMI is attributed to the combination of the Kondo effect and magnetic frustration effect. When the magnetic field B ∥ a is increased to 5 T, TMI is depressed to 0 K. At this critical magnetic field, the magnetic susceptibility χ follows the Curie-Weiss law, χ-1 - χ0-1 ∝ T, in a wide temperature range from 0.45 K to 300 K.

Original languageEnglish
Pages (from-to)537-540
Number of pages4
Journaljournal of the physical society of japan
Volume73
Issue number3
DOIs
Publication statusPublished - 2004 Mar 1

Keywords

  • Geometrical frustration
  • Heavy fermion compound
  • Magnetic transition
  • YbAgGe

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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