Skyrmions in Magnetic Materials (eBook)

Shinichiro Seki, Masahito Mochizuki (Autoren)

eBook Download: PDF

2015 | 1st ed. 2016
V, 69 Seiten
Springer International Publishing (Verlag)
978-3-319-24651-2 (ISBN)

Infos

This brief reviews current research on magnetic skyrmions, with emphasis on formation mechanisms, observation techniques, and materials design strategies. The response of skyrmions, both static and dynamical, to various electromagnetic fields is also covered in detail.

Recent progress in magnetic imaging techniques has enabled the observation of skyrmions in real space, as well as the analysis of their ordering manner and the details of their internal structure. In metallic systems, conduction electrons moving through the skyrmion spin texture gain a nontrivial quantum Berry phase, which provides topological force to the underlying spin texture and enables the current-induced manipulation of magnetic skyrmions. On the other hand, skyrmions in an insulator can induce electric polarization through relativistic spin-orbit interaction, paving the way for the control of skyrmions by an external electric field without loss of Joule heating. Because of its nanometric scale, particle nature, and electric controllability, skyrmions are considered as potential candidates for new information carriers in the next generation of spintronics devices.

Inhalt

Contents 6
1 Theoretical Model of Magnetic Skyrmions 7
1.1 What Is a Skyrmion? 7
1.2 Stabilisation of Magnetic Skyrmions 8
1.3 Model and Phase Diagrams 10
References 18
2 Observation of Skyrmions in Magnetic Materials 20
2.1 Skyrmions in Non-centrosymmetric Magnets 20
2.2 Skyrmions in Centrosymmetric Magnets 27
2.3 Skyrmions at Interface 31
References 35
3 Skyrmions and Electric Currents in Metallic Materials 37
3.1 Emergent Electromagnetic Fields 37
3.2 Electric-Current-Driven Motions of Skyrmions 39
3.3 Topological Hall Effect 45
3.4 Manipulation by Electric Current 48
Appendix 1: Landau-Lifshitz-Gilbert-Slonczewski Equation 52
Appendix 2: Derivation of Thiele's Equation 54
References 60
4 Skyrmions and Electric Fields in Insulating Materials 61
4.1 Magnetoelectric Skyrmions and Manipulation by Electric Fields 61
4.2 Magnetoelectric Resonance of Skyrmions 66
References 70
5 Summary and Perspective 71
References 73

Produkt-Details

• Erscheint lt. Verlag: 19.11.2015
• Reihe/Serie: SpringerBriefs in Physics
• Reihe/Serie: SpringerBriefs in Physics
• Zusatzinfo: V, 69 p. 30 illus. in color.
• Verlagsort: Cham
• Sprache: englisch
• Themenwelt: Naturwissenschaften ► Physik / Astronomie ► Theoretische Physik
• Themenwelt: Technik ► Maschinenbau
• Schlagworte: Berry Phase • Centrosymmetric Ferromagnets • Chiral Magnets • Conduction Electrons • Magnetic Bubble • Magnetoelectric Nature of Skyrmions • Novel Information Carriers, Spintronics • skyrmion • Skyrmions and Electric Currents • Skyrmions and Electric Field • Skyrmions and Magnetic Materials • Skyrmions Applications • Skyrmions, Electric Current Manipulation • Skyrmions Fundamentals • Skyrmions in Insulators • Skyrmion Spin Configuration Stabilization • Skyrmion Spin Texture • Skyrmions Stabilization • Spintronic Devices • Topological Hall Effect
• ISBN-10: 3-319-24651-8 / 3319246518
• ISBN-13: 978-3-319-24651-2 / 9783319246512