Magnetic neutron diffraction study of the charge-ordered chain compounds Rb_(11)Mn_8O_(16) and Cs_3Mn_2O_4

M. Reehuis; M. A. Senaris-Rodriguez; A. Hoser; B. Keimer; M. Jansen

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Magnetic neutron diffraction study of the charge-ordered chain compounds Rb_(11)Mn_8O_(16) and Cs_3Mn_2O_4

机译：电荷有序链化合物Rb_（11）Mn_8O_（16）和Cs_3Mn_2O_4的磁中子衍射研究

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The magnetic ordering patterns of Rb_(11)Mn_8O_(16) and Cs_3Mn_2O_4 were determined by neutron powder diffraction with and without applied magnetic fields. The crystal structures of these compounds exhibit infinite chains of edge-sharing MnO_4 tetrahedra with periodically alternating Mn~(2+) and Mn~(3+) valence. Both Rb_(11)Mn_8O_(16) and Cs_3Mn_2O_4 show collinear magnetic order with antiferromagnetic alignment of Mn moments along the chains below the Neel temperatures T_N = 38(1) and 13.5(5) K, respectively. In Cs_3Mn_2O_4 the Mn~(2+) and Mn~(3+) moments could be separately refined. The full magnetic structure in a zero magnetic field can be viewed as a set of ferrimagnetic chains whose net moments are coupled antiferromagnetically perpendicular to the chain direction. For this compound, we further observe a magnetic field induced transition into a high-field phase with uniformly aligned ferrimagnetic moments.

机译：Rb_（11）Mn_8O_（16）和Cs_3Mn_2O_4的磁有序模式是在有和没有施加磁场的情况下通过中子粉末衍射确定的。这些化合物的晶体结构表现出无限的边共享MnO_4四面体链，且Mn〜（2+）和Mn〜（3+）价周期性交替。 Rb_（11）Mn_8O_（16）和Cs_3Mn_2O_4均显示共线磁性，并且在Neel温度T_N = 38（1）和13.5（5）K以下分别沿链的Mn矩进行反铁磁排列。在Cs_3Mn_2O_4中，Mn〜（2+）和Mn〜（3+）矩可以分别细化。零磁场中的完整磁结构可以看作是一组铁磁链，其净矩垂直于链方向反铁磁耦合。对于该化合物，我们进一步观察到磁场感应到具有均匀排列的亚铁磁矩的高磁场相的转变。

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《Physical review》 |2013年第1期|014426.1-014426.7|共7页
作者
M. Reehuis; M. A. Senaris-Rodriguez; A. Hoser; B. Keimer; M. Jansen;
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作者单位

Helmholtz-Zentrum Berlin fuer Materialien und Energie, D-14109 Berlin, Germany;

Max Planck Institute for Solid State Research, Heisenbergstrasse 1, D-70569 Stuttgart, Germany,Departamento Quimica Fundamental, Facultad de Ciencias Universidad de A Coruna, E-15071 A Coruna, Spain;

Helmholtz-Zentrum Berlin fuer Materialien und Energie, D-14109 Berlin, Germany;

Max Planck Institute for Solid State Research, Heisenbergstrasse 1, D-70569 Stuttgart, Germany;

Max Planck Institute for Solid State Research, Heisenbergstrasse 1, D-70569 Stuttgart, Germany;

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inorganic compounds;

机译：无机化合物;

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Magnetic neutron diffraction study of the charge-ordered chain compounds Rb_(11)Mn_8O_(16) and Cs_3Mn_2O_4

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