Ab initio Theory of Magnetic Ordering : Electronic Origin of Pair- and Multi-Spin Interactions / by Eduardo Mendive Tapia.

Format:

Book

Author/Creator:

Mendive Tapia, Eduardo, author.

Contributor:

SpringerLink (Online service)

Series:

Physics and Astronomy (Springer-11651)

Springer Theses, Recognizing Outstanding Ph.D. Research,. 2190-5053

Springer Theses, Recognizing Outstanding Ph.D. Research, 2190-5053

Language:

English

Subjects (All):

Magnetism.

Magnetic materials.

Mathematical physics.

Phase transformations (Statistical physics).

Quantum computers.

Spintronics.

Magnetism, Magnetic Materials.

Theoretical, Mathematical and Computational Physics.

Phase Transitions and Multiphase Systems.

Quantum Information Technology, Spintronics.

Local Subjects:

Magnetism, Magnetic Materials.

Theoretical, Mathematical and Computational Physics.

Phase Transitions and Multiphase Systems.

Quantum Information Technology, Spintronics.

Physical Description:

1 online resource (XVIII, 131 pages) : 35 illustrations, 34 illustrations in color.

Edition:

First edition 2020.

Contained In:

Springer eBooks

Place of Publication:

Cham : Springer International Publishing : Imprint: Springer, 2020.

System Details:

text file PDF

Summary:

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.

Contents:

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 Effects

Pair- and Four- Spin Interactions in the Heavy Rare Earth Elements

Frustrated Magnetism in Mn-based Antiperovskite Mn3GaN

Summary and Outlook

Appendix.

Other Format:

Printed edition:

ISBN:

978-3-030-37238-5

9783030372385

Access Restriction:

Restricted for use by site license.