Elasticity and magnetocaloric effect in MnFe4Si3
- Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Julich Centre for Neutron Science JCNS and Peter Grunberg Institut, Julich (Germany); Univ. de Liege, Liege (Belgium)
- Julich Centre for Neutron Science JCNS and Peter Grunberg Institut, Julich (Germany)
- Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
- Julich Centre for Neutron Science JCNS and Peter Grunberg Institut, Julich (Germany); Univ. de Liege, Liege (Belgium); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
The room temperature magnetocaloric material MnFe4Si3 was investigated with nuclear inelastic scattering (NIS) and resonant ultrasound spectroscopy (RUS) at different temperatures and applied magnetic fields in order to assess the infuence of the magnetic transition and the magnetocaloric effect on the lattice dynamics. The NIS data give access to phonons with energies above 3 meV, whereas RUS probes the elasticity of the material in the MHz frequency range and thus low energy, ~5 neV, phonon modes. A significant infuence of the magnetic transition on the lattice dynamics is observed only in the low energy region. Here, MnFe4Si3 and other compounds in the Mn5-xFexSi3 series were also investigated with vibrating sample magnetometry, resistivity measurements and Moessbauer spectroscopy in order to study the magnetic transitions and to complement the obtained results on the lattice dynamics.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1242674
- Alternate ID(s):
- OSTI ID: 1242621
- Journal Information:
- Physical Review B, Vol. 93, Issue 9; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Lattice dynamics across the magnetic transition in
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journal | March 2018 |
Lattice dynamics and elasticity in thermoelectric
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journal | February 2019 |
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