Magnetoelastic Coupling in Mn-Fe-P-Si Compounds

Xue-fei Miao

Research output: ThesisDissertation (TU Delft)

24 Downloads (Pure)

Abstract

Mn-Fe-P-Si compounds are, to date, the most promising materials for refrigeration and energy conversion applications due to the combination of giant magnetocaloric effect (GMCE) and low material cost. The nature of magneto-elastic transition was studied on both length- and time-scales using neutron diffraction, muSR and Mӧssbauer spectroscopy techniques for Mn-Fe-P-Si compounds. The revealed strong spin-lattice coupling is responsible for the different magnetic orders, the tunability of the phase transition, and the excellent magnetocaloric properties in these compounds. This thesis contributes to a better understanding of the spin-lattice coupling and phase-transition behavior for Mn-Fe-P-Si compounds.
Original languageEnglish
QualificationDoctor of Philosophy
Supervisors/Advisors
  • Brück, E.H., Supervisor
  • van Dijk, N.H., Advisor
Award date7 Jul 2016
Print ISBNs978-90-8593-261-1
DOIs
Publication statusPublished - 7 Jul 2016

Keywords

  • Magnetocaloric effect
  • Neutron diffraction
  • Muon-spin relaxation
  • Mossbauer spectroscopy
  • Phase transition
  • Magntoelastic coupling

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