Magnetic Domain Walls in Bubble Materials: Advances in Materials and Device Research
Magnetic Domain Walls in Bubble Materials covers the physics of domain walls in bubble domain materials. The book describes the microscopic origins and characteristics of the material parameters; the principles of domain statics and the Landau-Lifshitz equation, which is the basic equation of magnetization dynamics; and its physical significance. The text then discusses the experimental techniques, both static and dynamic, used in studying domain walls; the static internal structure of bubble-domain walls; the Bloch-wall dynamics based on one-dimensional solutions of the Landau-Lifshitz equation; and the wall-motion theory.
The theory to low velocity phenomena in domain walls containing vertical Bloch; high-velocity radial and quasi-planar wall motions; and nonlinear bubble translation including the implications of the theory for bubble motion in devices, are also considered. The book further surveys special phenomena involving vibrations and wave motions of walls, and the effects of microwave-frequency fields on walls. Engineers and materials researchers involved in the development of practical bubble devices will find the book invaluable.
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Chapter 3 Experimental Techniques
Chapter 4 DomainWall Statics
Chapter 5 Wall Dynamics in One Dimension
Chapter 6 Wall Dynamics in Three Dimensions
Chapter 7 LowVelocity Dynamics with Vertical Bloch Lines
Chapter 8 Nonlinear Wall Motion in Two Dimensions
Chapter 9 Nonlinear Bubble Translation
Chapter 10 Wall Waves and Microwave Effects
LIST OF COMMONLY USED SYMBOLS
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according to Eq applied arising bias field Bloch point Bloch wall Bloch-line nucleation Bloch-wall bubble collapse bubble domain bubble films bubble materials bubble propagation bubble wall capping layer chiral coercivity configuration consider constant critical velocity Curie temperature curve damping demagnetizing device direction discussed in Section domain wall drive field dynamic equilibrium effect equation equilibrium EuGaWIG film exchange experimental experiments field H frequency function garnet films gradient gyromagnetic ratio gyrotropic hard bubbles horizontal Bloch line IG film illustrated in Fig in-plane anisotropy in-plane field increases lattice linear magnetostatic micromagnetic mobility momentum move Néel wall nonlinear observed one-dimensional orthoferrites parameters permalloy perpendicular plane polarity position precession punch-through radius region restoring force rotation saturation velocity Schematic shown in Fig spin spin structure static static equilibrium stray field stripe term theory tion torque vector vertical Bloch lines wall energy wall magnetization wall motion wall structure wall velocity winding number zero