mu+SR study on ferromagnetic hollandite K2Cr8O16 and Rb2Cr8O16

Article

关键词: PHASE-DIAGRAM;    CHAIN;    STATE;   

DOI  :  10.1103/PhysRevB.85.214407

来源: SCIE

【 摘 要 】

The magnetism of a quasi-one-dimensional ferromagnetic (FM) compound, K2Cr8O16, has been investigated by muon-spin rotation and relaxation (mu+SR) using a powder sample in the temperature range between 2 and 225 K. Below T-c = 163 K, muon-spin precession signals were clearly observed in the zero-field spectrum, indicating the formation of static FM order. It was also found that the internal field does not change drastically at the metal-to-insulator transition temperature, T-MI similar to 100 K. Electrostatic potential calculations and dipole field calculations suggested that FM order is not parallel to the [100], [010], [001], and [110] directions but likely parallel to the [101], [011], and/or [111] directions. A very similar result was obtained for a related compound, Rb2Cr8O16, while its T-c is 254 K.

【 授权许可】

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