Phase Selection in Mn-Si Alloys by Fast Solid-State Reaction with Enhanced Skyrmion Stability

Li Zichao; Xie Yufang; Yuan YeJi YandaBegeza ViktorCao LeiHubner ReneRebohle LarsHelm ManfredNielsch KorneliusPrucnal SlawomirZhou Shengqiang

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Phase Selection in Mn-Si Alloys by Fast Solid-State Reaction with Enhanced Skyrmion Stability

机译：Phase Selection in Mn-Si Alloys by Fast Solid-State Reaction with Enhanced Skyrmion Stability

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B20-type transition-metal silicides or germanides are noncentrosymmetric materials hosting magnetic skyrmions, which are promising information carriers in spintronic devices. The prerequisite is to prepare thin films on technology-relevant substrates with magnetic skyrmions stabilized at a broad temperature and magnetic-field working window. A canonical example is the B20-MnSi film grown on Si substrates. However, the as-yet unavoidable contamination with MnSi1.7 occurs due to the lower nucleation temperature of this phase. In this work, a simple and efficient method to overcome this problem and prepare single-phase MnSi films on Si substrates is reported. It is based on the millisecond reaction between metallic Mn and Si using flash-lamp annealing (FLA). By controlling the FLA energy density, single-phase MnSi or MnSi1.7 or their mixture can be grown at will. Compared with bulk MnSi, the prepared MnSi films show an increased Curie temperature of up to 41 K. In particular, the magnetic skyrmions are stable over a much wider temperature and magnetic-field range than reported previously. The results constitute a novel phase selection approach for alloys and can help to enhance specific functional properties, such as the stability of magnetic skyrmions.

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《Advanced functional materials》 |2021年第15期|2009723.1-2009723.8|共8页
作者
Li Zichao; Xie Yufang; Yuan YeJi YandaBegeza ViktorCao LeiHubner ReneRebohle LarsHelm ManfredNielsch KorneliusPrucnal SlawomirZhou Shengqiang;
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Tech Univ Dresden, Inst Mat Sci, D-01069 Dresden, Germany|Tech Univ Dresden, Inst Appl Phys, D-01062 Dresden, Germany|IFW, Inst Metall Mat, D-01069 Dresden, Germany;

Helmholtz Zentrum Dresden Rossendorf, Inst Ion Beam Phys & Mat Res, Bautzner Landstr 400, D-01328 Dresden, Germany;

Helmholtz Zentrum Dresden Rossendorf, Inst Ion Beam Phys & Mat Res, Bautzner Landstr 400, D-01328 Dresden, Germany|Tech Univ Dresden, Inst Mat Sci, D-01069 Dresden, GermanyHelmholtz Zentrum Dresden Rossendorf, Inst Ion Beam Phys & Mat Res, Bautzner Landstr 400, D-01328 Dresden, Germany|Tech Univ Dresden, Inst Appl Phys, D-01062 Dresden, GermanyHelmholtz Zentrum Dresden Rossendorf, Inst Ion Beam Phys & Mat Res, Bautzner Landstr 400, D-01328 Dresden, Germany|Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R ChinaNanjing Univ Aeronut & Astronaut, Coll Sci, Dept Appl Phys, Nanjing 211106, Jiangsu, Peoples R China;

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正文语种英语
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B20; 8208; MnSi; flash; lamp annealing; phase separation; skyrmions;

Phase Selection in Mn-Si Alloys by Fast Solid-State Reaction with Enhanced Skyrmion Stability

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