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arXiv · 1406.0211

A Neutron Scattering Study of the H-T Phase Diagram of the Bond Frustrated ZnCr2S4

D. Hsieh·Y. W. Li·S. Watauchi·Chang Liu·Q. Huang·R. J. Cava·J. W. Lynn·M. Z. Hasan
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Abstract

Detailed neutron scattering measurements on the bond frustrated magnet ZnCr2S4 reveal a rich H-T phase diagram. The field dependence of the two subsequent antiferromagnetic transitions follows closely that of recently reported structural instabilities, providing further evidence for spin driven Jahn-Teller physics. The incommensurate helical ordered phase below TN1 = 15.5 K exhibits gapless spin wave excitations, whereas a spin wave gap (about 2 meV) opens below TN2 = 8 K as the system undergoes a first-order transition to a commensurate collinear ordered phase. The spin wave gap is closed by a strong magnetic field.

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D. Hsieh, Y. W. Li, S. Watauchi, Chang Liu, Q. Huang, R. J. Cava, J. W. Lynn, M. Z. Hasan. 2014-06-01. A Neutron Scattering Study of the H-T Phase Diagram of the Bond Frustrated ZnCr2S4. https://arxiv.org/abs/1406.0211

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