Electron density studies on magnetic systems

Maurits Boeije

Research output: ThesisDissertation (TU Delft)

94 Downloads (Pure)

Abstract

In this thesis, the boundary conditions for the development of giant magnetocaloric materials
are investigated. The magnetocaloric effect is found in magnetic materials, when
they are subjected to an external magnetic field. This leads to abrupt magnetization
changes that cause a temperature change in the material. Materials based on Fe2P show
giant temperature changes around room temperature and are especially suited for cooling
applications. This is due to the large magnetization change that can be realized with
the application of a relatively small magnetic field around the ferro- to paramagnetic
phase transition. This transition is of a first order, giving rise to latent heat and rise to
‘‘giant’’ effects.
After earlier studies investigated the relation between microscopic and macroscopic
properties of these materials, the focus of this thesis is on the electronic factors that play
a role in the stability and phase transitions of these compounds. After all, when the
mechanism behind these phase transitions is clear, is it easier to search for new materials
that show similar phase transitions. Two strategies are possible: elucidating the
mechanism of Fe2P-based materials or investigating materials that show similar phase
transitions. The latter is described in the next paragraph...
Original languageEnglish
QualificationDoctor of Philosophy
Supervisors/Advisors
  • Brück, E.H., Supervisor
  • van Dijk, N.H., Advisor
Thesis sponsors
Award date3 Jul 2017
Print ISBNs978-94-6295-635-3
DOIs
Publication statusPublished - 2017

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