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arXiv 1007.4919cond-mat.str-el
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非常规铁磁体CeRh $_{3}$ B $_{2}$的低能磁激发谱

Low energy magnetic excitation spectrum of the unconventional ferromagnet CeRh$_{3}$B$_{2}$

S. Raymond, J. Panarin, F. Givord, A. P. Murani, J. X. Boucherle, P. Lejay

摘要:

用中子非弹性散射方法测量了非常规铁磁体CeRh $_{3}$ B $_{2}$在磁有序相和顺磁相的磁激发谱。自旋波激发谱证明沿c轴的高交换相互作用比在六方结构的基面中的高约两个数量级。发现了很强的面外各向异性和面内各向异性,这证实了仅考虑$J$ =5/2多重态不足以描述CeRh $_{3}$ B $_{2}$的基态.在$T_{Curie}$上方测得的准弹性散射在基面和c轴之间也具有很强的各向异性,并表明局部磁性。

英文摘要:

The magnetic excitation spectrum of the unconventional ferromagnet CeRh$_{3}$B$_{2}$ was measured by inelastic neutron scattering on single crystal sample in the magnetically ordered and paramagnetic phases. The spin-wave excitation spectrum evidences high exchange interaction along the c-axis about two orders of magnitude higher than the ones in the basal plane of the hexagonal structure. Both strong out of plane and small in plane anisotropies are found. This latter point confirms that considering the $J$=5/2 multiplet alone is not adequate for describing the ground state of CeRh$_{3}$B$_{2}$. Quasielastic scattering measured above $T_{Curie}$ is also strongly anisotropic between the basal plane and the c-axis and suggests localized magnetism.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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