Ferroelectrically tunable magnetic skyrmions in ultrathin oxide heterostructures
| Autor: | Yeong Jae Shin, Shawn D. Pollard, Miyoung Kim, Hyunsoo Yang, Daesu Lee, Yoonkoo Kim, Wenjie Meng, Jung Hoon Han, Qiyuan Feng, Lingfei Wang, Tae Won Noh, Rokyeon Kim, Wei Peng, Qingyou Lu, Haibiao Zhou, Ki Hoon Lee |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Spintronics Texture (cosmology) business.industry Mechanical Engineering Skyrmion Heterojunction 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Polarization (waves) 01 natural sciences Ferroelectricity Mechanics of Materials 0103 physical sciences Proximity effect (audio) Optoelectronics General Materials Science 010306 general physics 0210 nano-technology business Spin-½ |
| Zdroj: | Nature Materials. 17:1087-1094 |
| ISSN: | 1476-4660 1476-1122 |
| DOI: | 10.1038/s41563-018-0204-4 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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