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arXiv 1802.09758cond-mat.str-el
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阻挫反铁磁体LiCu2O2的奇异相

Exotic phases of frustrated antiferromagnet LiCu2O2

A. A. Bush, N. Büttgen, A. A. Gippius, M. Horvatić, M. Jeong, W. Kraetschmer, V. I. Marchenko, Yu. A. Sakhratov, L. E. Svistov

摘要:

在磁场高达17 T、温度为5-30 K的单晶LiCu_2 O_2上测量~ 7 Li NMR谱。早先报道的磁化曲线上的异常对应于磁场值,我们观察到NMR谱形状的变化。为了解释我们的NMR谱的场和温度的演变,磁结构的Dzyaloshinskiii-Landau理论的唯象理论方法的框架进行了分析。得到了一组可能的平面和共线结构。这些结构中的大多数具有不寻常的配置;它们的特征在于由两个分量的序参量和它们的磁矩不仅在方向上,而且在大小上谐波变化。从所观察到的光谱的建模,磁结构转换的一种可能的情况下获得。

英文摘要:

7Li NMR spectra were measured in a magnetic field up to 17 T at temperatures 5-30 K on single crystalline LiCu2O2. Earlier reported anomalies on magnetization curves correspond to magnetic field values where we observe changes of the NMR spectral shape. For the interpretation of the field and temperature evolutions of our NMR spectra, the magnetic structures were analyzed in the frame of the phenomenological theoretical approach of the Dzyaloshinskii-Landau theory. A set of possible planar and collinear structures was obtained. Most of these structures have an unusual configuration; they are characterized by a two-component order parameter and their magnetic moments vary harmonically not only in direction, but also in size. From the modeling of the observed spectra, a possible scenario of magnetic structure transformations is obtained.

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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