TY - JOUR
T1 - Creation and annihilation of non-volatile fixed magnetic skyrmions using voltage control of magnetic anisotropy
AU - Bhattacharya, Dhritiman
AU - Razavi, Seyed Armin
AU - Wu, Hao
AU - Dai, Bingqian
AU - Wang, Kang L.
AU - Atulasimha, Jayasimha
N1 - Funding Information:
D.B. and J.A. are supported in part by NSF CAREER grant CCF-1253370, NSF CCF-1909030 and NSF ECCS 1609303, a VCU Quest Commercialization Grant and a Virginia Microelectronics Seed Grant. S.A.R., H.W., B.D. and K.L.W. are supported by the National Science Foundation (NSF) ECCS 1611570 and NSF Nanosystems Engineering Research Center for Translational Applications of Nanoscale Multiferroic Systems (TANMS). The authors at UCLA are also supported by Spins and Heat in Nanoscale Electronic Systems (SHINES), an Energy Frontier Research Center funded by the US Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES) under award no. SC0012670. The authors at UCLA were also partially sponsored by the Army Research Office under grant no. W911NF-16-1-0472.
Publisher Copyright:
© 2020, The Author(s), under exclusive licence to Springer Nature Limited.
PY - 2020/9/1
Y1 - 2020/9/1
N2 - Magnetic skyrmions are topological spin textures that could be used to create magnetic memory and logic devices. Such devices typically rely on current-controlled motion of skyrmions, but using skyrmions that are fixed in space could lead to more compact and energy-efficient devices. Here we report the manipulation of fixed magnetic skyrmions using voltage-controlled magnetic anisotropy. We show that skyrmions can be stabilized in antiferromagnet/ferromagnet/oxide heterostructure films without any external magnetic field due to an exchange bias field. The isolated skyrmions are annihilated or formed by applying voltage pulses that increase or decrease the perpendicular magnetic anisotropy, respectively. We also show that skyrmions can be created from chiral domains by increasing the perpendicular magnetic anisotropy of the system. Our experimental findings are corroborated using micromagnetic simulations.
AB - Magnetic skyrmions are topological spin textures that could be used to create magnetic memory and logic devices. Such devices typically rely on current-controlled motion of skyrmions, but using skyrmions that are fixed in space could lead to more compact and energy-efficient devices. Here we report the manipulation of fixed magnetic skyrmions using voltage-controlled magnetic anisotropy. We show that skyrmions can be stabilized in antiferromagnet/ferromagnet/oxide heterostructure films without any external magnetic field due to an exchange bias field. The isolated skyrmions are annihilated or formed by applying voltage pulses that increase or decrease the perpendicular magnetic anisotropy, respectively. We also show that skyrmions can be created from chiral domains by increasing the perpendicular magnetic anisotropy of the system. Our experimental findings are corroborated using micromagnetic simulations.
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U2 - 10.1038/s41928-020-0432-x
DO - 10.1038/s41928-020-0432-x
M3 - Article
AN - SCOPUS:85087003572
SN - 2520-1131
VL - 3
SP - 539
EP - 545
JO - Nature Electronics
JF - Nature Electronics
IS - 9
ER -