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首页> 外文期刊>Physical review >Splitting of antiferromagnetic resonance modes in the quasi-two-dimensional collinear antiferromagnet Cu(en)(H_2O)_2SO_4
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Splitting of antiferromagnetic resonance modes in the quasi-two-dimensional collinear antiferromagnet Cu(en)(H_2O)_2SO_4

机译：准二维共线反铁磁体Cu（en）（H_2O）_2SO_4中反铁磁共振模式的分裂

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摘要

A low-temperature magnetic resonance study of the quasi-two-dimensional antiferromagnet Cu(en)(H_2O)_2SO_4 (en = C_2H_8N_2) was performed down to 0.45 K. This compound orders antiferromagnetically at 0.9 K. The analysis of the resonance data within the hydrodynamic approach allowed us to identify anisotropy axes and to estimate the anisotropy parameters for the antiferromagnetic phase. Dipolar spin-spin coupling turns out to be the main contribution to the anisotropy of the antiferromagnetic phase. The splitting of the resonance modes and its nonmonotonous dependence on the applied frequency were observed below 0.6 K in all three field orientations. Several models are discussed to explain the origin of the nontrivial splitting, and the existence of inequivalent magnetic subsystems in Cu(en)(H_2O)_2SO_4 is chosen as the most probable source.
机译：在低至0.45 K的条件下对准二维反铁磁体Cu（en）（H_2O）_2SO_4（en = C_2H_8N_2）进行了低温磁共振研究。该化合物在0.9 K时反铁磁有序。流体动力学方法使我们能够识别各向异性轴并估计反铁磁相的各向异性参数。事实证明，偶极自旋自旋耦合是反铁磁相各向异性的主要贡献。在所有三个场方向上，在0.6 K以下观察到共振模式的分裂及其对应用频率的非单调依赖性。讨论了几种模型来解释非平凡分裂的起源，并且选择了Cu（en）（H_2O）_2SO_4中不等价的磁性子系统作为最可能的来源。

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  • 来源
    《Physical review》 |2020年第1期|014414.1-014414.10|共10页
  • 作者

    V. N. Glazkov; Yu. V. Krasnikova; I. K. Rodygina; J. Chovan; R. Tarasenko; A. Orendacova;

  • 作者单位

    P.L. Kapitza Institute for Physical Problems RAS Kosygina 2 Moscow 119334 Russia International Laboratory for Condensed Matter Physics National Research University 'Higher School of Economics ' Myasnitskaya strasse 20 101000 Moscow Russia;

    P.L. Kapitza Institute for Physical Problems RAS Kosygina 2 Moscow 119334 Russia Faculty of Physics National Research University 'Higher School of Economics ' Myasnitskaya strasse 20 101000 Moscow Russia;

    IT4Innovations National Supercomputing Center VSB-Technical University of Ostrava 17 listopadu 2172/15 CZ 708 33 Ostrava Czech Republic International Clinical Research Center St. Anne's University Hospital Pekarska 53 656 91 Brno Czech Republic;

    Institute of Physics P. J. Safarik University Park Angelinum 9 040 00 Kosice Slovakia;

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