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首页> 外文期刊>Physical review >Magnetoelectric coupling without long-range magnetic order in the spin-1/2 multiferroic Rb_2Cu_2Mo_3O_(12)
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Magnetoelectric coupling without long-range magnetic order in the spin-1/2 multiferroic Rb_2Cu_2Mo_3O_(12)

机译：旋转1/2多重rb_2cu_2mo_3o_（12）中没有长范围磁场的磁电联轴器

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摘要

Rb2Cu2Mo3O12 is a quasi-one-dimensional frustrated S = 1/2 multiferroic that displays magnetic field-tunable ferroelectricity with no long-range magnetic order. To interrogate this intriguing behavior we employed dielectric measurements, neutron diffraction, and muon spin spectroscopy to study powder samples at mK temperatures and tesla magnetic fields. Subtle signatures in the experimental data allow the identification of different dielectric and magnetic regimes, none of which conclusively suggest the existence of magnetic long-range order. The results are broadly consistent with the system hosting a gapped nonmagnetic ground state in zero field, that undergoes a magnetic field-induced transition at similar to 2 T into a phase with a static, disordered spin arrangement. We discuss our results in the context of previous work on this system, and conclude that the origin of a magnetic field-dependent electric polarization with no long-range magnetic order could call for a new paradigm of magnetically driven ferroelectricity.
机译：RB2CU2MO3O12是一种准一维沮丧的S = 1/2个多体式，其显示磁场可调铁电性，没有远程磁场。为了询问这种有趣的行为，我们使用介电测量，中子衍射和μ子自旋光谱，以研究MK温度和特斯拉磁场的粉末样品。实验数据中的微妙签名允许识别不同的电介质和磁性制度，其中没有一个方面表明存在磁性远程顺序的存在。结果与托管在零场中的栅格非磁性接地状态的系统广泛一致，该系统在磁场引起的磁场引起的过渡与2T类似于具有静态，无序的自旋布置的相位。我们在先前的工作环境中讨论了我们的结果，并得出结论，磁场依赖性电极化的起源，没有远程磁场可以呼叫磁驱动铁电性的新范式。

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  • 来源
    《Physical review》 |2019年第21期|214443.1-214443.10|共10页
  • 作者

    Reynolds N.; Mannig A.; Luetkens H.; Baines C.; Goko T.; Scheuermann R.; Keller L.; Bartkowiak M.; Fujimura A.; Yasui Y.; Niedermayer Ch; White J. S.;

  • 作者单位

    Paul Scherrer Inst Lab Neutron Scattering & Imaging LNS CH-5232 Villigen Switzerland;

    Paul Scherrer Inst Lab Neutron Scattering & Imaging LNS CH-5232 Villigen Switzerland;

    Paul Scherrer Inst Lab Muon Spin Spect LMU CH-5232 Villigen Switzerland;

    Paul Scherrer Inst Lab Muon Spin Spect LMU CH-5232 Villigen Switzerland;

    Paul Scherrer Inst Lab Muon Spin Spect LMU CH-5232 Villigen Switzerland;

    Paul Scherrer Inst Lab Muon Spin Spect LMU CH-5232 Villigen Switzerland;

    Paul Scherrer Inst Lab Neutron Scattering & Imaging LNS CH-5232 Villigen Switzerland;

    Paul Scherrer Inst Lab Sci Dev & Novel Mat LDM CH-5232 Villigen Switzerland;

    Meiji Univ Sch Sci & Technol Dept Phys Tama Ku Kawasaki Kanagawa 2148571 Japan;

    Meiji Univ Sch Sci & Technol Dept Phys Tama Ku Kawasaki Kanagawa 2148571 Japan;

    Paul Scherrer Inst Lab Neutron Scattering & Imaging LNS CH-5232 Villigen Switzerland;

    Paul Scherrer Inst Lab Neutron Scattering & Imaging LNS CH-5232 Villigen Switzerland;

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