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EuTiO_3 magnetic structure studied by neutron powder diffraction and resonant x-ray scattering

机译:通过中子粉末衍射和共振x射线散射研究EuTiO_3的磁性结构

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摘要

We combine neutron powder diffraction and x-ray single-crystal magnetic diffraction at the Eu L_2 edge to scrutinize the magnetic motif of the Eu ions in magnetoelectric EuTiO_3. Our measurements are consistent with an antiferromagnetic G-type pattern with the Eu magnetic moments ordering along the a,b -plane diagonal. Recent reports of a novel transition at 2.75 K with a flop of magnetic moments upon poling the sample in an electric field cannot be confirmed for a nonpoled sample. Our neutron diffraction data do not show any significant change of the structure below the Neel temperature. Magnetoelastic coupling, if present, is therefore expected to be negligible.
机译:我们在Eu L_2边缘结合了中子粉末衍射和X射线单晶磁衍射,以仔细研究磁电EuTiO_3中Eu离子的磁性图案。我们的测量结果与反铁磁G型图案一致,其中Eu磁矩沿a,b平面对角线排序。对于非极化样品,最新的报道表明在电场中极化样品后在2.75 K处具有一阶磁矩的新型跃迁无法得到证实。我们的中子衍射数据没有显示出在Neel温度以下结构的任何显着变化。因此,如果存在磁弹性耦合,则可以忽略不计。

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  • 来源
    《Physical review》 |2012年第9期|p.094432.1-094432.7|共7页
  • 作者单位

    Swiss Light Source, Paul Scherrer Institut, CH 5232 Villigen PSI, Switzerland,European Synchrotron Radiation Facility, BP 220, 38043 Grenoble Cedex 9, France;

    Dipartimento di Chimica, Universita degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy;

    European Synchrotron Radiation Facility, BP 220, 38043 Grenoble Cedex 9, France,Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg, Germany;

    Dipartimento di Chimica, Universita degli Studi di Milano, ISTM-CNR and INSTM Unit, Via Golgi 19, 20133 Milano, Italy;

    Department of Physics, Waseda University, Tokyo 169-8555, Japan;

    Swiss Federal Laboratories for Materials Sciences and Technology (Empa), Solid State Chemistry and Catalysis, Uberlandstrasse 129, 8600 Dubendorf, Switzerland;

    Laboratory for Neutron Scattering, Paul Scherrer Institut, CH 5232 Villigen PSI, Switzerland;

    European Synchrotron Radiation Facility, BP 220, 38043 Grenoble Cedex 9, France,Politecnico di Milano e unita CNISM, p.zza L. Da Vinci 32, 1-20133, Milano, Italy;

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  • 正文语种 eng
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  • 关键词

    manganites;

    机译:锰矿;

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