Year: 2015
Type: article
Abstract: We study, by microsimulation on the chiral magnets, the elementary functions of magnetic skyrmions and the design principles of skyrmionic memory devices. The external stimuli, such as local heating, magnetic field, electric field and electric current, trigger the creation and annihilation of the skyrmion. These procedures, corresponding to the writing and erasing operations, are achieved typically within of the order of nano or pico seconds. We also examine the current driven motion of the skyrmions and find that the gyro-dynamics, which is induced by the topological nature of the skyrmion, leads to the variety of useful functions including the remarkable enhancement of the spin-transfer-torque effect. These features are shown to be advantageous for (a) high-density data-storage, (b) nonvolatile memory, and (c) ultra-low current and energy cost manipulation.
Authors: Wataru Koshibae, Yoshio Kaneko, Junichi Iwasaki, Masashi Kawasaki, Yoshinori Tokura, Naoto Nagaosa
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Awards: G1620295381, G3808792075, スキルミオンダイナミクスの理論的研究, Quantum functionalities and device applications of two-dimensional electron system at oxide interfaceshy, Excitation and relaxation dynamics of correlated electron systems, Highly sensitive transport by merging different ordered states, Emergent electromagnetism in magnets
OpenAlex ID: W2069364330