Magnetoelastic coupling in the incommensurate antiferromagnetic phase of FeOCl

Article

关键词: MAGNETIC-STRUCTURE;    IRON OXYCHLORIDE;    SYSTEM;   

DOI  :  10.1103/PhysRevB.86.134428

来源: SCIE

【 摘 要 】

The antiferromagnetic phase transition of FeOCl has been studied by temperature-dependent x-ray-diffraction experiments, magnetic susceptibility, heat capacity, and dielectric measurements. The magnetic phase transition is found to be accompanied by a monoclinic lattice distortion, affecting the angle gamma between crystallographic axes parallel to the layers comprising the quasi-two-dimensional magnetic system. The temperature-dependent magnitude of gamma shows the phase transition to be of second order. Satellite reflections occur in x-ray diffraction with twice the magnetic modulation wave vector. These positions are temperature dependent, providing evidence for an incommensurate character of the magnetic order. The observed Neel temperature is T-N = 81.0 (2) K.

【 授权许可】

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