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首页> 外文期刊>Physical review >μ~+SR study on ferromagnetic hollandite K_2Cr_8O_(16) and Rb_2Cr_8O_(16)
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μ~+SR study on ferromagnetic hollandite K_2Cr_8O_(16) and Rb_2Cr_8O_(16)

机译：铁磁方铁矿K_2Cr_8O_（16）和Rb_2Cr_8O_（16）的μ〜+ SR研究

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摘要

The magnetism of a quasi-one-dimensional ferromagnetic (FM) compound, K_2Cr_8O_(16), has been investigated by muon-spin rotation and relaxation (μ~+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) ～ 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, Rb_2Cr_8O_(16), while itsT_c is 254 K.
机译：使用μ旋转和弛豫（μ〜+ SR），在2至225 K的温度范围内使用粉末样品，研究了准一维铁磁（FM）化合物K_2Cr_8O_（16）的磁性。在T_c = 163 K以下，在零场频谱中清楚地观察到了μ自旋进动信号，表明形成了静态FM阶。还发现，在金属到绝缘体的转变温度T_（MI）〜100 K时，内部场不会发生剧烈变化。静电势计算和偶极场计算表明FM阶与[100]不平行， [010]，[001]和[110]方向，但可能平行于[101]，[011]和/或[111]方向。对于相关化合物Rb_2Cr_8O_（16），获得了非常相似的结果，而其T_c为254K。

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  • 来源
    《Physical review》 |2012年第21期|p.214407.1-214407.8|共8页
  • 作者

    Jun Sugiyama; Hiroshi Nozaki; Martin Mansson; Krunoslav Prsa; Daniel Andreica; Alex Amato; Masahiko Isobe; Yutaka Ueda;

  • 作者单位

    Toyota Central Research and Development Laboratories Inc., Nagakute, Aichi 480-1192, Japan;

    Toyota Central Research and Development Laboratories Inc., Nagakute, Aichi 480-1192, Japan;

    Laboratory for Solid State Physics, ETH Zuerich, CH-8093 Zuerich, Switzerland,Laboratory for Neutron Scattering, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland;

    Laboratory for Solid State Physics, ETH Zuerich, CH-8093 Zuerich, Switzerland,Laboratory for Quantum Magnetism, Ecole Polytechnique Federale de Lausanne, Station 3, CH-1015 Lausanne, Switzerland;

    Faculty of Physics, Babes-Bolyai University, 3400 Cluj-Napo'ca, Romania;

    Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland;

    Materials Design and Characterization Laboratory, Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan;

    Materials Design and Characterization Laboratory, Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan;

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    muon spin rotation and relaxation; other ferromagnetic metals and alloys; metal-insulator transitions and other electronic transitions;

    机译：介子旋转和松弛;其他铁磁金属和合金;金属绝缘体过渡和其他电子过渡;

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