Yb 2(Pd 1-xNi x) 2Sn: Interplay of geometrical frustration and Kondo effect in quantum spin system

Fumitake Kikuchi, Katsuya Hara, Eiichi Matsuoka, Hideya Onodera, Shintaro Nakamura, Tsutomu Nojima, Kenichi Katoh, Akira Ochiai

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Single crystals of Yb 2(Pd 1-xNi x)2Sn with × = 0, 0.1, and 0.2 were prepared to clarify the effects of pressure on Yb 2Pd 2Sn which is considered to reside near the quantum critical point. The magnetization and specific heat measurements revealed that their ground states are regarded as an S = 1/2 XY-like spin system. Although nondoped Yb 2Pd 2Sn shows no magnetic transition down to 0.5 K owing to the Kondo effect, Ni-doped Yb 2Pd 2Sn exhibits a distinct magnetic transition. Furthermore, the magnetic susceptibility of Ni-doped Yb 2Pd 2Sn exhibits a broad peak in the temperature range higher than the magnetic transition temperature, which is not explained by the S = 1/2 Coqblin-Schrieffer model, suggesting the effect of geometrical frustration arising from the characteristic structure of these compounds, i.e., the Shastry-Sutherland lattice.

Original languageEnglish
Article number083708
Journaljournal of the physical society of japan
Volume78
Issue number8
DOIs
Publication statusPublished - 2009 Aug

Keywords

  • Quantum critical point
  • Quantum spin system
  • Shastry-Sutherland lattice
  • Xy-type Spin
  • Yb (Pd Ni ) Sn
  • Yb Pd Sn

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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