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Chirality of structure and magnetism in the magnetoelectric compound Cu_2OSeO_3

机译：磁电化合物Cu_2OSeO_3的结构和磁性手性

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摘要

Small-angle diffraction of polarized neutrons and resonant contribution to diffraction of synchrotron radiation have been applied to prove chirality of the crystal and magnetic structures of the magnetoelectric insulator Cu_2OSeO_3. Similarly to other chiral magnets with P2_13 crystal structure the corresponding chiralities are linked to each other via the phenomenological Dzyaloshinskii-Moriya interaction. The crystal and magnetic structures for Cu_2OSeO_3 have the same chirality as is observed for MnSi, Mn_(1-x)Fe_xSi, and MnGe. However, the combination of chiralities is opposite to that proposed from a recent theoretical consideration. The chiral link between structure and magnetism previously found for metallic compounds is also proved to exist for an insulator (Cu_2OSeO_3), allowing us to conclude that the conducting electrons play no role in a possible common microscopic mechanism of this specific magnetolattice interaction.
机译：极化中子的小角度衍射和对同步辐射的衍射的共振贡献已被用于证明磁电绝缘子Cu_2OSeO_3的晶体和磁性结构的手性。与其他具有P2_13晶体结构的手性磁铁相似，相应的手性通过现象学Dzyaloshinskii-Moriya相互作用相互连接。 Cu_2OSeO_3的晶体和磁性结构具有与MnSi，Mn_（1-x）Fe_xSi和MnGe相同的手性。但是，手性的组合与最近的理论考虑所提出的相反。先前发现的金属化合物的结构和磁性之间的手性联系也被证明存在于绝缘子（Cu_2OSeO_3）中，这使我们可以得出结论，导电电子在这种特定的磁晶相互作用的可能的微观机制中不起作用。

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  • 来源
    《Physical review》 |2014年第14期|140409.1-140409.5|共5页
  • 作者

    V. Dyadkin; K. Prsa; S. V. Grigoriev; J. S. White; P. Huang; H. M. Ronnow; A. Magrez; C. D. Dewhurst; D. Chernyshov;

  • 作者单位

    Swiss-Norwegian Beamlines at the European Synchrotron Radiation Facility, 38000 Grenoble, France,Petersburg Nuclear Physics Institute, 188300 Gatchina, Saint Petersburg, Russia;

    Laboratory for Quantum Magnetism, Ecole Polytechnique Federate de Lausanne (EPFL), CH-1015 Lausanne, Switzerland;

    Petersburg Nuclear Physics Institute, 188300 Gatchina, Saint Petersburg, Russia,Saint Petersburg State University, Ulyanovskaya 1, 198504 Saint Petersburg, Russia;

    Laboratory for Quantum Magnetism, Ecole Polytechnique Federate de Lausanne (EPFL), CH-1015 Lausanne, Switzerland,Laboratory for Neutron Scattering, Paul Scherrer Institut, CH-5232 Villigen, Switzerland;

    Laboratory for Quantum Magnetism, Ecole Polytechnique Federate de Lausanne (EPFL), CH-1015 Lausanne, Switzerland;

    Laboratory for Quantum Magnetism, Ecole Polytechnique Federate de Lausanne (EPFL), CH-1015 Lausanne, Switzerland;

    Institute of Condensed Matter Physics, Ecole Polytechnique Federate de Lausanne (EPFL), CH-1015 Lausanne, Switzerland;

    Institute Laue-Langevin, 38042 Grenoble Cedex 9, France;

    Swiss-Norwegian Beamlines at the European Synchrotron Radiation Facility, 38000 Grenoble, France;

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  • 正文语种 eng
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  • 关键词

    critical-point effects, specific heats, short-range order;

    机译：临界点效应;比热;短程顺序;

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