Magnetic skyrmion logic gates: conversion, duplication and merging of skyrmions
TL;DR: In this article, the conversion, duplication and merging of isolated skyrmions with different chirality and topology are demonstrated all in one system, and they also demonstrate the conversion of another form of a Skyrmion into another form, i.e., a bimeron.
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Abstract: Magnetic skyrmions, which are topological particle-like excitations in ferromagnets, have attracted a lot of attention recently. Skyrmionics is an attempt to use magnetic skyrmions as information carriers in next generation spintronic devices. Proposals of manipulations and operations of skyrmions are highly desired. Here, we show that the conversion, duplication and merging of isolated skyrmions with different chirality and topology are possible all in one system. We also demonstrate the conversion of a skyrmion into another form of a skyrmion, i.e., a bimeron. We design spin logic gates such as the AND and OR gates based on manipulations of skyrmions. These results provide important guidelines for utilizing the topology of nanoscale spin textures as information carriers in novel magnetic sensors and spin logic devices.
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Citations
Topological computation based on direct magnetic logic communication
TL;DR: It is demonstrated numerically that the topology of the system plays a significant role for its dynamics, using the example of vortex-antivortex pairs in a planar ferromagnetic film, and direct logic communication between the topological memory carriers is realised.
Skyrmionics—Computing and memory technologies based on topological excitations in magnets
Hamed Vakili,Jun-Wen Xu,Wei Zhou,Mohammad Nazmus Sakib,Golam Morshed,Timothy Q. Hartnett,Yassine Quessab,Kai Litzius,Chung T. Ma,Samiran Ganguly,Mircea R. Stan,Prasanna V. Balachandran,Geoffrey S. D. Beach,S. Joseph Poon,Andrew D. Kent,Avik W. Ghosh +15 more
TL;DR: In this article, the authors discuss skyrmionics in the context of the present-day solid-state memory landscape and show how their size, stability, and mobility can be controlled by material engineering, as well as how they can be nucleated and detected.
Experimental demonstration of skyrmionic magnetic tunnel junction at room temperature.
Sai Li,Ao Du,Yadong Wang,Xinran Wang,Houyi Cheng,Wenlong Cai,Shiyang Lu,Kaihua Cao,Biao Pan,Na Lei,Wang Kang,Jun-Ming Liu,Albert Fert,Zhipeng Hou,Weisheng Zhao +14 more
TL;DR: In this article , the authors reported the direct observation of nanoscale skyrmions in CoFeB/MgO-based magnetic tunnel junction devices at room temperature, which are stabilized under the cooperation of interfacial Dzyaloshinskii-Moriya interaction, perpendicular magnetic anisotropy, and dipolar stray field.
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Static and dynamic properties of bimerons in a frustrated ferromagnetic monolayer
Xichao Zhang,Jing Xia,Laichuan Shen,Motohiko Ezawa,Oleg A. Tretiakov,Guoping Zhao,Xiaoxi Liu,Yan Zhou +7 more
TL;DR: In this article, the static properties of magnetic bimerons with different topological structures in a frustrated ferromagnetic monolayer were investigated, where the bimeron structure is characterized by the vorticity and helicity of the magnet.
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Experimental Observation of Single Skyrmion Signatures in a Magnetic Tunnel Junction.
TL;DR: D deterministically created a stable topological spin texture in magnetic tunnel junctions (MTJ) by using pulsed or microwave currents and this work shows the possibility to create skyrmions in MTJs without the Dzyaloshinskii-Moriya interaction and could lead to noninvasive, on-chip skyrMion measurement.
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