Neutron Scattering Studies of the Breathing Pyrochlore Antiferromagnet

Zheng He, Yiqing Gu, Hongliang Wo, Yu Feng, Die Hu, Yiqing Hao, Yimeng Gu, Helen C. Walker, Devashibhai T. Adroja, Jun Zhao

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

We report neutron scattering measurements of the spinel oxide , in which magnetic ions form a breathing pyrochlore lattice. Our experiments reveal the coexistence of a nearly dispersionless resonance mode and dispersive spin-wave excitations in the magnetically ordered state, which can be quantitatively described by a quantum spin model of hexagonal loops and linear spin-wave theory with the same set of exchange parameters, respectively. Comparison to other Cr spinel oxides reveals a linear relationship between the resonance energy and lattice constant across all these materials, which is in agreement with our hexagonal loop calculations. Our results suggest a unified picture for spin resonances in Cr spinel oxides.

Original languageEnglish
Article number147205
JournalPhysical Review Letters
Volume127
Issue number14
DOIs
Publication statusPublished - 1 Oct 2021

ASJC Scopus subject areas

  • General Physics and Astronomy

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