Coherent behavior and nonmagnetic impurity effects of spin disordered state in NiGa 2S 4

Yusuke Nambu, Satoru Nakatsuji, Yoshiteru Maeno

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

Nonmagnetic impurity effects of the spin disordered state in the triangular antiferromagnet NiGa 2S 4 were studied through magnetic and thermal measurements for Ni 1-xZn xGa 2S 4 (0:0 ≤ x ≤ 0:3). Only 1% substitution is enough to strongly suppress the coherence observed in the spin disordered state. However, the suppression is not complete and the robust feature of the T 2- dependent specific heat and its scaling behavior with the Weiss temperature indicate the existence of a coherent Nambu-Goldstone mode. The absence of either conventional magnetic order or bulk spin freezing suggests a novel symmetry breaking of the ground state.

Original languageEnglish
Article number043711
Journaljournal of the physical society of japan
Volume75
Issue number4
DOIs
Publication statusPublished - 2006 Apr

Keywords

  • Nambu-Goldstone mode
  • NiGa S
  • Spin disordered state
  • Triangular lattice

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Coherent behavior and nonmagnetic impurity effects of spin disordered state in NiGa <sub>2</sub>S <sub>4</sub>'. Together they form a unique fingerprint.

Cite this