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首页> 外文期刊>Physical review >Neutron diffraction, magnetic, and magnetoelectric studies of phase transitions in multiferroic Mn_(0.90)Co_(0.10)WO_4
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Neutron diffraction, magnetic, and magnetoelectric studies of phase transitions in multiferroic Mn_(0.90)Co_(0.10)WO_4

机译:多铁性Mn_(0.90)Co_(0.10)WO_4中相变的中子衍射,磁和磁电研究

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摘要

We have studied various spontaneous and magnetic-field-induced phase transitions in single crystals of multiferroic Mn_(0.9)Co_(0.1)WO_4 using magnetic and magnetoelectric measurements and neutron diffraction. Compared to pure MnWO_4, our data consistently confirm that the anisotropic Co~(2+) ions induce reorientation of the spin cycloid structure to the ac plane and reveal P_a and P_c components of spontaneous electric polarization. Field-induced phase transitions accompanied by anomalies of magnetic susceptibility and suppression of both P_a and P_c polarizations have been observed for H||c (~3 T) and H||a (~8.5 T). Neutron diffraction has revealed that in both cases the spin cycloid plane flops in direction almost perpendicular to H, i.e., close to the ab and bc planes, respectively. Parameters describing the magnetic structures including wave vectors, orientations of the main elliptical axes, etc., have been determined in all spontaneous and field-induced states.
机译:我们已经使用磁和磁电测量以及中子衍射研究了多铁性Mn_(0.9)Co_(0.1)WO_4单晶中各种自发和磁场诱导的相变。与纯MnWO_4相比,我们的数据一致地证实各向异性的Co〜(2+)离子会引起自旋摆线结构重新定向到ac平面,并揭示出自发极化的P_a和P_c成分。对于H || c(〜3 T)和H || a(〜8.5 T),已经观察到场感应相变,伴随着磁化率异常和P_a和P_c极化的抑制。中子衍射表明,在两种情况下,自旋摆线平面都在几乎垂直于H的方向上翻转,即分别靠近ab和bc平面。已经在所有自发和磁场感应状态下确定了描述磁结构的参数,包括波矢,椭圆长轴的方向等。

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  • 来源
    《Physical review》 |2012年第9期|p.094436.1-094436.10|共10页
  • 作者单位

    Institut Laue Langevin, 6 rue Jules Horowitz BP 156, F-38042 Grenoble Cedex 9, France;

    SPSMS, UMR-E CEA/UJF-Grenoble 1, INAC, Grenoble, F-38054, France;

    Prokhorov General Physics Institute, Russian Academy of Science, Vavilov Street, 38, 119991 Moscow, Russia;

    Prokhorov General Physics Institute, Russian Academy of Science, Vavilov Street, 38, 119991 Moscow, Russia;

    Moscow Power Engineering Institute, 105835 Moscow, Russia;

    M. V. Lomonosov Moscow State University, 119992 Moscow, Russia;

    M. V. Lomonosov Moscow State University, 119992 Moscow, Russia;

    M. V. Lomonosov Moscow State University, 119992 Moscow, Russia;

    Institut de Ciencia de Materials de Barcelona, ICMAB-CSIC, Campus Universitari de Bellaterra, E-08193 Bellaterra, Barcelona, Spain;

    Instituci6 Catalana de Recerca i Estudis Avangats (ICREA), 08010 Barcelona, Spain,Departament de Fisica, Universitat Autdnoma de Barcelona, E-08193 Bellaterra, Barcelona, Spain;

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  • 正文语种 eng
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  • 关键词

    antiferromagnetics;

    机译:反铁磁;

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