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arXiv 1204.3597cond-mat.str-elcond-mat.mtrl-scicond-mat.other
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Cu2OSeO3的长波螺旋磁序和Skyrmion晶格相

Long wavelength helimagnetic order and skyrmion lattice phase in Cu2OSeO3

T. Adams, A. Chacon, M. Wagner, A. Bauer, G. Brandl, B. Pedersen, H. Berger, P. Lemmens, C. Pfleiderer

摘要:

我们报告了一个长波长helmagnetic超结构在大块样品的亚铁磁绝缘体Cu 2 OSeO 3。与从小角中子散射和磁化测量推断的螺旋磁调制相关的磁相图包括skyrmion晶格相,并且强烈地让人联想到MnSi、FeGe和Fe 1-xCoxSi,即,Cu 2 OSeO 3的二元同构兄弟,按螺旋磁序排列。的比热的温度依赖性的Cu 2 OSeO 3是近临界的自旋波动的helmagnetic转变的特点。这提供了推定的证据,有效的自旋电流的磁介电响应,而不是原子位移考虑到目前为止的增强的起源。

英文摘要:

We report a long-wavelength helimagnetic superstructure in bulk samples of the ferrimagnetic insulator Cu2OSeO3. The magnetic phase diagram associated with the helimagnetic modulation inferred from small angle neutron scattering and magnetisation measurements includes a skyrmion lattice phase and is strongly reminiscent of MnSi, FeGe and Fe1-xCoxSi, i.e., binary isostructural siblings of Cu2OSeO3 that order helimagnetically. The temperature dependence of the specific heat of Cu2OSeO3 is characteristic of nearly critical spin fluctuations at the helimagnetic transition. This provides putative evidence for effective spin currents as the origin of enhancements of the magneto-dielectric response instead of atomic displacements considered so far.

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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