Orbital Freezing in FeCr2S4 Studied by Dielectric Spectroscopy
作者： R. Fichtl , V. Tsurkan , P. Lunkenheimer , J. Hemberger , V. Fritsch
DOI: 10.1103/PHYSREVLETT.94.027601
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摘要: Broadband dielectric spectroscopy has been performed on single-crystalline FeCr2S4 revealing a transition into low-temperature orbital glass phase and polycrystalline where long-range order is established via cooperative Jahn-Teller transition. The freezing of the moments revealed by clear relaxational behavior permittivity, which allows unique characterization relaxation dynamics continuously slows down over six decades in time, before at lowest temperatures becomes suppressed quantum tunneling.
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