Pressure effect on successive magnetic transitions in a frustrated compound YbAgGe

K. Umeo, K. Yamane, Y. Muro, K. Katoh, Y. Niide, A. Ochiai, T. Takabatake

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

We report the measurements of electrical resistivity ρ under various pressures for the single crystal of a heavy-fermion compound YbAgGe. This compound undergoes two magnetic phase transitions at TM1=0.8K (second order) and TM2=0.65K (first order). With applying pressure above 0.5 GPa, the resistive anomalies at TM1 and TM2 merge into a sharp drop at TM. In the range 0.5<P<1.5GPa, TM is constant, whereas the concomitant increase of ρ(0.5K) suggests the development of spin fluctuations. For P>1.5GPa, ρ(0.5K) largely decreases and the anomaly in ρ(T=TM) becomes broader and shifts to higher temperatures. These significant changes at 1.5 GPa suggest a transition from a small-moment ordered state to a stable magnetic state with suppressed spin fluctuations.

Original languageEnglish
Pages (from-to)130-132
Number of pages3
JournalPhysica B: Condensed Matter
Volume359-361
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - 2005 Apr 30

Keywords

  • Heavy-fermion compound
  • Pressure effect
  • YbAgGe

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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