LEADER 04149nam 22006615 450 001 996418436303316 005 20200706054959.0 010 $a3-030-37238-3 024 7 $a10.1007/978-3-030-37238-5 035 $a(CKB)4940000000158793 035 $a(DE-He213)978-3-030-37238-5 035 $a(MiAaPQ)EBC6005492 035 $a(PPN)242842879 035 $a(EXLCZ)994940000000158793 100 $a20200103d2020 u| 0 101 0 $aeng 135 $aurnn|008mamaa 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aAb initio Theory of Magnetic Ordering$b[electronic resource] $eElectronic Origin of Pair- and Multi-Spin Interactions /$fby Eduardo Mendive Tapia 205 $a1st ed. 2020. 210 1$aCham :$cSpringer International Publishing :$cImprint: Springer,$d2020. 215 $a1 online resource (XVIII, 131 p. 35 illus., 34 illus. in color.) 225 1 $aSpringer Theses, Recognizing Outstanding Ph.D. Research,$x2190-5053 311 $a3-030-37237-5 327 $aIntroduction -- 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. 330 $aMany technological applications exploit a variety of magnetic structures, or magnetic phases, to produce and optimise solid-state functionality. However, most research advances are restricted to a reduced number of phases owing to computational and resource constraints. This thesis presents an ab-initio theory to efficiently describe complex magnetic phases and their temperature-dependent properties. The central assumption is that magnetic phases evolve slowly compared with the underlying electronic structure from which they emerge. By describing how the electronic structure adapts to the type and extent of magnetic order, a theory able to describe multi-spin correlations and their effect on the magnetism at finite temperature is obtained. It is shown that multi-spin correlations are behind the temperature and magnetic field dependence of the diverse magnetism in the heavy rare earth elements. Magnetically frustrated Mn-based materials and the effect of strain are also investigated. These studies demonstrate that the performance of solid-state refrigeration can be enhanced by multi-spin effects. 410 0$aSpringer Theses, Recognizing Outstanding Ph.D. Research,$x2190-5053 606 $aMagnetism 606 $aMagnetic materials 606 $aMathematical physics 606 $aPhase transitions (Statistical physics) 606 $aQuantum computers 606 $aSpintronics 606 $aMagnetism, Magnetic Materials$3https://scigraph.springernature.com/ontologies/product-market-codes/P25129 606 $aTheoretical, Mathematical and Computational Physics$3https://scigraph.springernature.com/ontologies/product-market-codes/P19005 606 $aPhase Transitions and Multiphase Systems$3https://scigraph.springernature.com/ontologies/product-market-codes/P25099 606 $aQuantum Information Technology, Spintronics$3https://scigraph.springernature.com/ontologies/product-market-codes/P31070 615 0$aMagnetism. 615 0$aMagnetic materials. 615 0$aMathematical physics. 615 0$aPhase transitions (Statistical physics). 615 0$aQuantum computers. 615 0$aSpintronics. 615 14$aMagnetism, Magnetic Materials. 615 24$aTheoretical, Mathematical and Computational Physics. 615 24$aPhase Transitions and Multiphase Systems. 615 24$aQuantum Information Technology, Spintronics. 676 $a621.34 700 $aMendive Tapia$b Eduardo$4aut$4http://id.loc.gov/vocabulary/relators/aut$0841696 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a996418436303316 996 $aAb initio Theory of Magnetic Ordering$92022319 997 $aUNISA