Crystalline electric field study in the pyrochlore Nd2Ir 2O7 with metal-insulator transition

M. Watahiki, K. Tomiyasu, K. Matsuhira, K. Iwasa, M. Yokoyama, S. Takagi, M. Wakeshima, Y. Hinatsu

Research output: Contribution to journalConference articlepeer-review

16 Citations (Scopus)

Abstract

We carried out inelastic neutron scattering measurements to identify crystalline electric field (CEF) states of Nd3+ (a total angular momentum J = 9/2) in Nd2Ir2O7, which exhibits a metal-insulator transition at TMI = 36 K. Excitation peaks observed around 26 and 41 meV are interpreted as CEF excitations within five Kramers doublets. It is notable that splitting of the ground doublet by 1.3 meV was microscopically observed at 3 K for the first time, indicating emergence of magnetic long-range order despite geometrical frustration. The splitting width decreases with increasing the temperature towards TMI like an order parameter of the transition. We discuss the results in light of Nd-Ir interactions.

Original languageEnglish
Article number012080
JournalJournal of Physics: Conference Series
Volume320
DOIs
Publication statusPublished - 2011
EventInternational Conference on Frustration in Condensed Matter, ICFCM - Sendai, Japan
Duration: 2011 Jan 112011 Jan 14

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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