Trimer-based spin liquid candidate B a4NbI r3 O12

Loi T. Nguyen, R. J. Cava

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Ba4NbIr3O12, a material with a triangular planar geometry of Ir3O12 trimers, is described. Magnetic susceptibility measurements show it to be paramagnetic with no magnetic ordering down to 1.8 K despite the Curie-Weiss temperature (θCW) of -13 K. The material has a very low effective magnetic moment (μeff) of 0.80 μB/f.u. To look at the lower-temperature behavior, the specific heat (Cp) was measured down to 0.35 K; it shows no indication of magnetic ordering and fitting a power law to Cp vs T below 2 K yields the power α=3/4. Comparison to the trimer compound made with the 4d element Rh in place of the 5d element Ir, Ba4NbRh3O12, which is also paramagnetic (μeff=1.48μB/f.u., θCW=-23K), is presented. The analysis suggests that Ba4NbIr3O12 is a candidate spin liquid material.

Original languageEnglish (US)
Article number014412
JournalPhysical Review Materials
Volume3
Issue number1
DOIs
StatePublished - Jan 23 2019

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Physics and Astronomy (miscellaneous)

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