Magnetic Order In Ybmno_3 Studied By Neutron Diffraction And Moessbauer Spectroscopy

X. Fabrèges; I. Mirebeau; P. Bonville; S. Petit; G. Lebras-Jasmin; A. Forget; G. André; S. Pailhès

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Magnetic Order In Ybmno_3 Studied By Neutron Diffraction And Moessbauer Spectroscopy

机译：中子衍射和莫斯鲍尔谱研究Ybmno_3的磁阶

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The magnetic ordering of the hexagonal multiferroic compound YbMnO_3 has been studied between 100 and 1.5 K by combining neutron powder diffraction, ~(170)Yb Mossbauer spectroscopy, and magnetization measurements. The Yb moments of the two crystallographic sites order at two different temperatures: the 4b site together with the Mn moments (at T_Napprox=85 K) and the 2α site well below (at 3.5 K). The temperature dependences of the Mn and Yb moments are explained within a molecular-field model, showing that the 4b and 2α sites order via Yb-Mn and Yb-Yb interactions, respectively. A simple picture taking into account the local Mn environment of the rare-earth R (4b) ion is proposed to couple R and Mn orders in hexagonal RMnO_3 manganites. The nature and symmetry of the R-Mn interactions yielding the R order are discussed.

机译：通过结合中子粉末衍射，〜（170）Yb Mossbauer光谱学和磁化强度测量，研究了六角形多铁化合物YbMnO_3的磁序在100和1.5 K之间。两个晶体学位点的Yb矩在两个不同的温度下有序：4b位点和Mn矩（在T_Napprox = 85 K时）和2α位在下面（在3.5 K时）。在分子场模型中解释了Mn和Yb矩的温度依赖性，表明4b和2α位分别通过Yb-Mn和Yb-Yb相互作用有序。提出了一个简单的图片，考虑了稀土R（4b）离子的局部Mn环境，以将R和Mn阶偶合在六方RMnO_3锰矿中。讨论了产生R阶的R-Mn相互作用的性质和对称性。

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《Physical review》 |2008年第21期|488-495|共8页
作者
X. Fabrèges; I. Mirebeau; P. Bonville; S. Petit; G. Lebras-Jasmin; A. Forget; G. André; S. Pailhès;
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spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.); moesbauer effect; other gamma-ray spectroscopy; magnetomechanical and magnetoelectric effects, magnetostriction; magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.);

机译：磁性有序材料中的自旋排列（包括中子和自旋极化电子研究;同步加速器源X射线散射等）;穆斯堡尔效应;其他伽马射线光谱学;磁机械和磁电效应;磁致伸缩;磁相边界（包括磁跃迁;超磁学等）;

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Magnetic Order In Ybmno_3 Studied By Neutron Diffraction And Moessbauer Spectroscopy

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