M. Donath, W. Nolting (auth.), Professor Markus Donath, Professor Wolfgang Nolting (eds.)3540272860, 9783540272861
Some ferromagnetic materials with localized magnetic moments have become a hot topic in modern solid-state physics because of their potential applications, e.g. in spintronic devices. The magnetic systems of interest comprise diluted magnetic semiconductors and half-metallic ferromagnets. Like conventional concentrated local-moment systems, they are characterized by an exchange interaction between localized magnetic moments and quasi-free charge carriers. The current research on local-moment ferromagnetism is reviewed in a tutorial style by leading experts in this field. Experimentalists present the latest approaches to characterize the unique material properties, and theoreticians propose definitive ideas to explain the observed phenomena. Students and researches alike will benefit from this status report.
Table of contents :
Introduction….Pages 1-7
Critical Behaviour of Heisenberg Ferromagnets with Dipolar Interactions and Uniaxial Anisotropy….Pages 9-29
Aspects of the FM Kondo Model: From Unbiased MC Simulations to Back-of-an-Envelope Explanations….Pages 31-45
Carrier Induced Ferromagnetism in Concentrated and Diluted Local-Moment Systems….Pages 47-69
An Origin of CMR: Competing Phases and Disorder-Induced Insulator-to-Metal Transition in Manganites….Pages 71-86
A Neutron Scattering Investigation of MnAs….Pages 87-96
Epitaxial MnAs Films Studied by Ferromagnetic and Spin Wave Resonance….Pages 97-109
First-Principles Study of the Magnetism of Diluted Magnetic Semiconductors….Pages 111-130
Exchange Interactions and Magnetic Percolation in Diluted Magnetic Semiconductors….Pages 131-145
The Role of Interstitial Mn in GaAs-Based Dilute Magnetic Semiconductors….Pages 147-161
Magnetic Interactions in Granular Paramagnetic-Ferromagnetic GaAs:Mn/MnAs Hybrids….Pages 167-184
Dilute Ferromagnetic Oxides….Pages 185-198
Half-Metals: Challenges in Spintronics and Routes Toward Solutions….Pages 199-216
Nonquasiparticle States in Half-Metallic Ferromagnets….Pages 217-243
Theoretical Stoichiometry and Surface States of a Semi-Heusler Alloy….Pages 245-259
Magnetization, Spin Polarization, and Electronic Structure of NiMnSb Surfaces….Pages 261-273
Spin Injection Experiments from Half-Metallic Ferromagnets into Semiconductors: The Case of NiMnSb and (Ga,Mn)As….Pages 275-287
Growth and Room Temperature Spin Polarization of Half-metallic Epitaxial CrO 2 and Fe3O 4 Thin Films….Pages 289-308
On the Importance of Defects in Magnetic Tunnel Junctions….Pages 309-329
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