[논문]Observation of Skyrmions at Room Temperature in Co 2 FeAl Heusler Alloy Ultrathin Film Heterostructures

Husain, Sajid; Sisodia, Naveen; Chaurasiya, Avinash Kumar; Kumar, Ankit; Singh, Jitendra Pal; Yadav, Brajesh S.; Akansel, Serkan; Chae, Keun Hwa; Barman, Anjan; Muduli, P. K.; Svedlindh, Peter; Chaudhary, Sujeet

doi:10.1038/s41598-018-35832-3

[해외논문] Observation of Skyrmions at Room Temperature in Co 2 FeAl Heusler Alloy Ultrathin Film Heterostructures 원문보기

Scientific reports, v.9, 2019년, pp.1085 -

Husain, Sajid (Thin Film Laboratory, Department of Physics, Indian Institute of Technology Delhi, New Delhi, 110016 India) , Sisodia, Naveen (Thin Film Laboratory, Department of Physics, Indian Institute of Technology Delhi, New Delhi, 110016 India) , Chaurasiya, Avinash Kumar (Department of Condensed Matter Physics and Material Sciences, S. N. Bose National Centre for Basic Sciences, Block –) , Kumar, Ankit (JD, Sector –) , Singh, Jitendra Pal (III, Salt Lake, Kolkata, 700106 India) , Yadav, Brajesh S. (Department of Engineering Sciences, Uppsala University, SE-75121 Uppsala, Sweden) , Akansel, Serkan (Advanced Analysis Center, Korea Institute of Science and Technology, Seoul, 02792 Republic of Korea) , Chae, Keun Hwa (Solid State Physics Laboratory, Lucknow Road, Timarpur, Delhi, 110054 India) , Barman, Anjan (Department of Engineering Sciences, Uppsala University, SE-75121 Uppsala, Sweden) , Muduli, P. K. (Advanced Analysis Center, Korea Institute of Science and Technology, Seoul, 02792 Republic of Korea) , Svedlindh, Peter (Department of Condensed Matter Physics and Material Sciences, S. N. Bose National Centre for Basic Sciences, Block –) , Chaudhary, Sujeet (JD, Sector –)

Abstract ▼ AI-Helper

Magnetic skyrmions are topological spin-textures having immense potential for energy efficient spintronic devices. Here, we report the observation of stable skyrmions in unpatterned Ta/Co2FeAl(CFA)/MgO thin film heterostructures at room temperature in remnant state employing magnetic force microscopy. It is shown that these skyrmions consisting of ultrathin ferromagnetic CFA Heusler alloy result from strong interfacial Dzyaloshinskii-Moriya interaction (i-DMI) as evidenced by Brillouin light scattering measurements, in agreement with the results of micromagnetic simulations. We also emphasize on room temperature observation of multiple skyrmions which can be stabilized for suitable combinations of CFA layer thickness, perpendicular magnetic anisotropy, and i-DMI. These results provide a significant step towards designing of room temperature spintronic devices based on skyrmions in full Heusler alloy based thin films.

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[해외논문] Observation of Skyrmions at Room Temperature in Co 2 FeAl Heusler Alloy Ultrathin Film Heterostructures 원문보기

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[해외논문] Observation of Skyrmions at Room Temperature in Co 2 FeAl Heusler Alloy Ultrathin Film Heterostructures 원문보기

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