Pressure-induced release of magnetic frustration in a quasi-Kagome antiferromagnet YbAgGe

Hirokazu Kubo, Kazunori Umeo, Kenichi Katoh, Akira Ochiai, Toshiro Takabatake

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


We report on specific-heat measurements under various pressures up to 3.2 GPa for a heavy-fermion antiferromagnet YbAgGe with a quasi-kagome lattice of Yb ions. For 0.5 < P < P* = 1.6 GPa, the magnetic transition temperature TM remains constant at 0.85 K, while above P* the TM increases linearly with a slope of 0.52 K/GPa. Concomitantly, the specific-heat anomaly at TM converts from a first-order type sharp peak to a second-order type jump. The magnetic entropy at TM rises for P > P*, whereas the Kondo temperature TK does not change, contrary to the behavior expected from the Doniach phase diagram. These findings suggest that the sudden rise of TM(P) for P > P* is not due to the lowering of TK but the release of the magnetic frustration.

Original languageEnglish
Article number023704
Journaljournal of the physical society of japan
Issue number2
Publication statusPublished - 2008 Feb


  • Heavy fermion
  • Kondo effect
  • Magnetic frustration
  • Pressure
  • YbAgGe

ASJC Scopus subject areas

  • Physics and Astronomy(all)


Dive into the research topics of 'Pressure-induced release of magnetic frustration in a quasi-Kagome antiferromagnet YbAgGe'. Together they form a unique fingerprint.

Cite this