Absence of long-range order in an pyrochlore antiferromagnet ErAlSbO
arXiv:2004.11265 · doi:10.1103/PhysRevMaterials.4.054406
Abstract
Rare-earth pyrochlores are known to exhibit exotic magnetic phenomena. We report a study of crystal growth and characterizations of a new rare-earth compound ErAlSbO, in which Al and Sb ions share the same positions with a random distribution. The magnetism are studied by magnetic susceptibility, specific heat and thermal conductivity measurements at low temperatures down to several tens of milli-kelvin. Different from the other reported Er-based pyrochlores exhibiting distinct magnetically ordered states, a spin-freezing transition is detected in ErAlSbO below 0.37 K, which is primarily ascribed to the inherent structural disorder. A cluster spin-glass state is proposed in view of the frequency dependence of the peak position in the ac susceptibility. In addition, the temperature and field dependence of thermal conductivity indicates rather strong spin fluctuations which is probably due to the phase competition.
arXiv comment10 pages, 8 figures, accepted for publication Phys. Rev. Materials
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