Observation of Skyrmions at Room Temperature in Co2FeAl Heusler Alloy Ultrathin Film Heterostructures

被引：19

作者：

Husain, Sajid ^{[1
]}

Sisodia, Naveen ^{[1
]}

Chaurasiya, Avinash Kumar ^{[2
]}

Kumar, Ankit ^{[3
]}

Singh, Jitendra Pal ^{[5
]}

Yadav, Brajesh S. ^{[4
]}

Akansel, Serkan ^{[3
]}

Chae, Keun Hwa ^{[5
]}

Barman, Anjan ^{[2
]}

Muduli, P. K. ^{[1
]}

Svedlindh, Peter ^{[3
]}

Chaudhary, Sujeet ^{[1
]}

机构：

[1] Indian Inst Technol Delhi, Dept Phys, Thin Film Lab, New Delhi 110016, India

[2] SN Bose Natl Ctr Basic Sci, Dept Condensed Matter Phys & Mat Sci, Block JD,Sect 3, Kolkata 700106, India

[3] Uppsala Univ, Dept Engn Sci, SE-75121 Uppsala, Sweden

[4] Solid State Phys Lab, Lucknow Rd, Delhi 110054, India

[5] Korea Inst Sci & Technol, Adv Anal Ctr, Seoul 02792, South Korea

来源：

SCIENTIFIC REPORTS | 2019年 / 9卷 / 1期

关键词：

X-RAY-ABSORPTION; DZYALOSHINSKII-MORIYA INTERACTION; CURRENT-DRIVEN DYNAMICS; MAGNETIC SKYRMIONS; FERROMAGNETISM; LATTICES; EXCHANGE; MOTION;

D O I：

10.1038/s41598-018-35832-3

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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.

引用

页数：12

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