Mechanical properties of multiferroic Bi2Mn4O10: Full set of elastic constants determined by inelastic neutron scattering
Mechanical properties of multiferroic Bi2Mn4O10: Full set of elastic constants determined by inelastic neutron scattering
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多铁性 Bi2Mn4O10 的机械性能：由非弹性中子散射确定的全套弹性常数
DOI：
10.1002/pssb.201552670
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Eckhold
中科院分区：
文献类型：
--
作者：
Ziegler;Gibhardt;Murshed;Gesing;Eckhold
用声子谱测定了常温下多铁相Bi2Mn4O10的弹性常数全矩阵。在三轴中子谱仪PUMA@FRM II上测量了声子在单晶中不同传播方向的色散。相互独立的9个弹性常数的大小表明，力学行为是强各向异性的，其软化方向与低温多铁相的磁化强度矢量几乎一致。各向异性可能与莫来石结构的构件之间的不同类型的链接有关。横向声子模的声速的三维表示(m S−1)。
The full matrix of elastic constants of multiferroic Bi2Mn4O10has been determined at ambient conditions using phonon spectroscopy. The dispersion of acoustic phonons in a single crystal was measured at the three axes neutron spectrometer PUMA@FRM II for different propagation directions. The magnitudes of the independent nine elastic constants show that the mechanical behavior is strongly anisotropic with a soft direction which almost coincides with the magnetization vector in the low‐temperature multiferroic phase. The anisotropy can be related to the different types of links between the building blocks of the mullite structure.Three dimensional representation of the sound velocities (in m s−1) for a transverse acoustic phonon‐mode.