Temperature-dependent investigation of the mechanical anisotropy of Bi2Mn4O10 in the multiferroic phase
There are ongoing debates on the origin of multiferroicity in many materials and different microscopic mechanisms of the magneto-electric coupling are discussed. In the mullite-type Bi2Mn4O10-compound, ferroelectricity is supposed to be induced by magnetostriction as consequence of the magnetic long-range order. Since lattice distortions play a vital role in this mechanism, it is essential to investigate the temperature-dependent mechanical properties of the relevant compounds near the magnetic phase transition. As a straight-forward continuation of our previous inelastic neutron scattering study at ambient conditions performed at the PUMA-spectrometer, we propose to determine the temperature dependence of selected acoustic phonons which reflect the dynamical anisotropy near the multiferroic transition at TN=40 K.
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ECKOLD Goetz; Thorsten M. Gesing; GIBHARDT Holger; IVANOV Alexandre; M. Mangir Murshed; PIOVANO Andrea; SOBOLEV Oleg and ZIEGLER Fabian. (2017). Temperature-dependent investigation of the mechanical anisotropy of Bi2Mn4O10 in the multiferroic phase. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.7-02-164
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