Ferroelectrically tunable magnetic skyrmions in ultrathin oxide heterostructures

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Title
Ferroelectrically tunable magnetic skyrmions in ultrathin oxide heterostructures
Author(s)
Lingfei Wang; Feng, QY; Kim, Y; Rokyeon Kim; Ki Hoon Lee; Pollard, SD; Yeong Jae Shin; Haibiao Zhou; Wei Peng; Daesu Lee; Meng, WJ; Yang, H; Han, JH; Kim, M; Lu, QY; Tae Won Noh
Publication Date
2018-12
Journal
NATURE MATERIALS, v.17, no.12, pp.1087 - 1094
Publisher
NATURE PUBLISHING GROUP
Abstract
Magnetic skyrmions are topologically protected whirling spin texture. Their nanoscale dimensions, topologically protected stability and solitonic nature, together are promising for future spintronics applications. To translate these compelling features into practical spintronic devices, a key challenge lies in achieving effective control of skyrmion properties, such as size, density and thermodynamic stability. Here, we report the discovery of ferroelectrically tunable skyrmions in ultrathin BaTiO3/SrRuO3 bilayer heterostructures. The ferroelectric proximity effect at the BaTiO3/SrRuO3 heterointerface triggers a sizeable Dzyaloshinskii-Moriya interaction, thus stabilizing robust skyrmions with diameters less than a hundred nanometres. Moreover, by manipulating the ferroelectric polarization of the BaTiO3 layer, we achieve local, switchable and nonvolatile control of both skyrmion density and thermodynamic stability. This ferroelectrically tunable skyrmion system can simultaneously enhance the integratability and addressability of skyrmion-based functional devices © The Author(s), under exclusive licence to Springer Nature Limited 2018
URI
https://pr.ibs.re.kr/handle/8788114/5375
ISSN
1476-1122
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
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