Magnetic Phase Transitions and Magnetic Structures in Mn-based Compounds

Doctoral thesis (2023)

Authors

A. Kiecana RST/Fundamental Aspects of Materials and Energy - AS
Research Group
RST/Fundamental Aspects of Materials and Energy (AS) (TU Delft)
Copyright: © 2023 A. Kiecana
DOI: https://doi.org/10.4233/uuid:7851d718-d584-45ff-bc68-ab77188e286e
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Published Date

2023

Language

English

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Faculty

Applied Sciences

Department

RST/Radiation, Science and Technology

Research Group

RST/Fundamental Aspects of Materials and Energy

Abstract

The growing demand for energy highlights the need for developing more efficient and environmentally friendly technologies. Magnetic cooling based on the magnetocaloric effect is a promising alternative for compressor-based refrigeration. Among various magnetocaloric materials, Mn-based alloys appear especially attractive due to their low cost, high abundance and the potentially large magnetic moment density. We aimed to obtain a large magnetocaloric effect at room temperature in various non-toxic and inexpensive magnetocaloric materials. Thus, this thesis contains the study on the magnetism, magnetocaloric effect and (micro)structure of three families of Mn-based magnetocaloric materials: (Mn,Fe)2(P,Si), Mn3Sn1-xAxC antiperovskite carbides, MnNiSi half Heusler alloys. A particular part of this dissertation focuses on the elucidation of magnetic structures in antiperovskite carbides.