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arXiv 0902.0975cond-mat.str-elcond-mat.supr-con
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X射线共振磁散射研究EuRh2As2中的磁有序

Magnetic ordering in EuRh2As2 studied by x-ray resonant magnetic scattering

S. Nandi, A. Kreyssig, Y. Lee, Yogesh Singh, J. W. Kim, D. C. Johnston, B. N. Harmon, A. I. Goldman

摘要:

进行特定元素的X射线共振磁散射研究以确定EuRh 2As 2中Eu的磁结构。在46 ~ 6 K温度范围内,传播矢量随温度变化(0 0 0.9)的无公度反铁磁结构与公度反铁磁结构共存.角度相关的测量的磁场强度表明,磁矩位于四极基底平面和铁磁排列的a-b平面内的两个磁性结构。ICM结构是一个螺旋状的磁性结构,相邻的Eu平面之间的转角为162度。在CM结构中,该角度为180度。这些结果是一致的带结构的计算表明了很强的灵敏度的磁配置上的Eu价。

英文摘要:

Element-specific x-ray resonant magnetic scattering investigations were performed to determine the magnetic structure of Eu in EuRh2As2. In the temperature range from 46 K down to 6 K, an incommensurate antiferromagnetic (ICM)structure with a temperature dependent propagation vector (0 0 0.9) coexists with a commensurate antiferromagnetic (CM) structure. Angular-dependent measurements of the magnetic intensity indicate that the magnetic moments lie in the tetragonal basal plane and are ferromagnetically aligned within the a-b plane for both magnetic structures. The ICM structure is a spiral-like magnetic structure with a turn angle of 162 deg between adjacent Eu planes. In the CM structure, this angle is 180 deg. These results are consistent with band-structure calculations which indicate a strong sensitivity of the magnetic configuration on the Eu valence.

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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