High Magnetic Field Investigations of the Dimerized System Ba<sub>0.1</sub>Sr<sub>2.9</sub>Cr<sub>2</sub>O

ORAL

Abstract

The well-studied compounds Sr3Cr2O8 and Ba3Cr2O8 are insulating dimerized antiferromagnets with magnetic ions, Cr5+. These spin ½ ions have a strong intradimer antiferromagnetic coupling, which leads to a singlet ground state and gapped triplet states. Spontaneous long-range ordering occurs upon applying an external magnetic field. We investigate the magnetic properties of Sr3Cr2O8 by introducing chemical disorder upon replacing Sr by Ba. We performed heat capacity and ultrasound velocity measurements in high magnetic fields up to 30 T and 60 T respectively, in order to map the magnetic phase transitions. Moreover, electron spin resonance (ESR) measurements were done to investigate different transitions between the singlet ground state and gapped triplet states.

*This work was supported by the Swiss National Science Foundation Grants No. 21-153659 and 20-175554. We acknowledge the support of the HLD, LNCMI and HFML, members of the European Magnetic Field Laboratory (EMFL).

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Presenters

  • Alsu Gazizulina

    • Physik-Institut, University of Zurich
    • University of Zurich

Authors

  • Alsu Gazizulina

    • Physik-Institut, University of Zurich
    • University of Zurich

  • Diana L. Quintero Castro

    • University of Stavanger
    • Helmholtz-Zentrum Berlin für Materialien und Energie

  • Andreas Schilling

    • Physik-Institut, University of Zurich
    • Physik-Institut, Universität Zürich
    • University of Zurich