<div class="csl-bib-body">
<div class="csl-entry">Frischauf, K. (2019). <i>The Giant inverse magnetocaloric effect in Ni-Mn-Sn alloys</i> [Diploma Thesis, Technische Universität Wien]. reposiTUm. https://doi.org/10.34726/hss.2019.65164</div>
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dc.identifier.uri
https://doi.org/10.34726/hss.2019.65164
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/1753
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dc.description
Abweichender Titel nach Übersetzung der Verfasserin/des Verfassers
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dc.description.abstract
The giant inverse magnetocaloric effect was measured for four different NiMnSn alloys. Their content of elements was varied by only 1-2% respectively, but showed big changes to the phase transition temperatures and magnetic entropy change. It was expected that an increase in valence electrons per atom (e/a) and a decrease in the size of the unit cell (Vcell) would increase their phase transition temperaturesrespectively. Increasing the amount of Ni by 1 % at cost of Mn, increased the transition temperatures but also slightly reduced the magnetic entropy change (SM) and refrigerant capacity (RC). Introducing 2% of Si or Ge on cost of Sn reduced Vcell, as confirmed with XRD measurements. This is supposed to hold e/a constant, but is not yet confirmed experimentally. Si and Ge doping strongly decreased the RC and significantly shifted the transition temperatures down and up, respectively. This thesis contains information about their lattice constants, martensitic and austenitic phase transition temperatures, Curie temperatures, isothermal magnetization measurements, critical exponents, magnetic entropy change and resulting refrigerant capacities.
en
dc.language
English
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dc.language.iso
en
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dc.rights.uri
http://rightsstatements.org/vocab/InC/1.0/
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dc.subject
magnetokalorischer Effekt
de
dc.subject
magnetocaloric effect
en
dc.title
The Giant inverse magnetocaloric effect in Ni-Mn-Sn alloys
en
dc.title.alternative
Der magnetokalorische Effekt in Ni-Mn-Sn Legierungen