Spatial Antiferromagnetic Spin Texture as a Nano-Oscillator

Abstract

We report a theoretical study of the localized spatial magnetization configuration, which is a confined spin configuration of the target skyrmion/hopfion type in an antiferromagnet with perpendicular magnetic anisotropy, and then we solve the particular problem of self-oscillations of such a topological spin texture. Using the energy approach, a self-consistent account of inhomogeneity of the characteristics of the topological magnetic spin texture was carried out. On this basis, the equation of free oscillations of the confined spin configuration magnetization was derived and its quasi-classical solution was found. For a thin ring spin texture, the frequency, period of oscillations and relative amplitude of the main tone of oscillations are found. For the first time, we determined the topological mass, inertial mass and total energy of the main tone of oscillations of such spatial spin texture. The self-oscillatory process of a spatial spin texture is interpreted as a magnetic nano-oscillator.

17 pages, 2 figures

References in corpus (9)

• Advances in the Physics of Magnetic Skyrmions and Perspective for Technology
• Spontaneous Skyrmion Ground States in Magnetic Metals
• Direct imaging of a zero-field target skyrmion and its polarity switch in a chiral magnetic nanodisk
• Inertia and chiral edge modes of a skyrmion magnetic bubble
• Inertia, diffusion and dynamics of a driven skyrmion
• Breathing modes of confined skyrmions in ultrathin magnetic dots
• Giant magnetic anisotropy of the bulk antiferromagnets IrMn and IrMn3
• Spin-Hall nanooscillator based on an antiferromagnetic domain wall
• Skyrmion Mass from Spin-Phonon Interaction