Ab initio Theory of Magnetic Ordering
Electronic Origin of Pair- and Multi-Spin Interactions
(Sprache: Englisch)
Many technological applications exploit a variety of magnetic structures, or magnetic phases, to produce and optimise solid-state functionality. However, most research advances are restricted to a reduced number of phases owing to computational and resource...
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Klappentext zu „Ab initio Theory of Magnetic Ordering “
Many technological applications exploit a variety of magnetic structures, or magnetic phases, to produce and optimise solid-state functionality. However, most research advances are restricted to a reduced number of phases owing to computational and resource constraints. This thesis presents an ab-initio theory to efficiently describe complex magnetic phases and their temperature-dependent properties.The central assumption is that magnetic phases evolve slowly compared with the underlying electronic structure from which they emerge. By describing how the electronic structure adapts to the type and extent of magnetic order, a theory able to describe multi-spin correlations and their effect on the magnetism at finite temperature is obtained.
It is shown that multi-spin correlations are behind the temperature and magnetic field dependence of the diverse magnetism in the heavy rare earth elements. Magnetically frustrated Mn-based materials and the effect of strain are also investigated. These studies demonstrate that the performance of solid-state refrigeration can be enhanced by multi-spin effects.
Inhaltsverzeichnis zu „Ab initio Theory of Magnetic Ordering “
Introduction.- Ab-initio Theory of Electronic Structure.- Disordered Local Moment Theory and Fast Electronic Responses.- Minimisation of the Gibbs Free Energy: Magnetic Phase Diagrams and Caloric E ects.- Pair- and Four- Spin Interactions in the Heavy Rare Earth Elements.- Frustrated Magnetism in Mn-based Antiperovskite Mn3GaN.- Summary and Outlook.- Appendix.Autoren-Porträt von Eduardo Mendive Tapia
Eduardo Mendive Tapia's first research experience was made possible by a Departmental Collaboration Fellowship at the University of Barcelona, where he also obtained his Bachelor in Physics. After completing a master on spintronics at the university of Nottingham, he started a PhD at the University of Warwick under the wise guidance of Prof. Julie B. Staunton. From her he learned deep aspects of the theory of magnetism at finite temperature, which inspired him to study multi-spin interactions and their use for solid-state cooling technology. Following a short-term DAAD grant to work at Forschungszentrum Jülich, Eduardo became a postdoctoral researcher at the Max-Planck-Institut in Düsseldorf, where he continues to research on magnetism and refrigeration.
Bibliographische Angaben
- Autor: Eduardo Mendive Tapia
- 2020, 1st ed. 2020, XVIII, 131 Seiten, 34 farbige Abbildungen, Masse: 15,9 x 23,8 cm, Gebunden, Englisch
- Verlag: Springer, Berlin
- ISBN-10: 3030372375
- ISBN-13: 9783030372378
Sprache:
Englisch
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