Mechanical properties of multiferroic Bi2 Mn4 O10 : Full set of elastic constants determined by inelastic neutron scattering
| Autor: | M.M. Murshed, Oleg Sobolev, Fabian Ziegler, Götz Eckold, Holger Gibhardt, Thorsten M. Gesing |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Condensed matter physics Phonon 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Inelastic neutron scattering Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Crystallography Magnetization 0103 physical sciences Dispersion (optics) Neutron 010306 general physics 0210 nano-technology Anisotropy Spectroscopy Single crystal |
| Zdroj: | physica status solidi (b). 253:976-982 |
| ISSN: | 0370-1972 |
| DOI: | 10.1002/pssb.201552670 |
| Popis: | The full matrix of elastic constants of multiferroic Bi2Mn4O10 has 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. |
| Databáze: | OpenAIRE |
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