Skyrmion phase in MnSi on sapphire grown by a conventional sputtering

Abstract

Topologically protected chiral skyrmion is an intriguing spin texture, which has attracted much attention because of fundamental research and future spintronic applications. MnSi with the non-centrosymmetric structure is well-known material hosting skyrmion phase. To date, preparation of MnSi crystals has been investigated by using special instruments with ultrahigh vacuum chamber. Here, we introduce a facile way to grow MnSi films on sapphire, which is in relatively low vacuum environment of conventional magnetron sputtering. Magnetotransport properties including Hall resistivity measurements allow to confirm the existence of skyrmion phase in MnSi film. Because as-grown MnSi films on sapphire has polycrystalline nature, the emergent features of skyrmion phase are limited and complicated. However, we observed the stable skyrmion phase in a broad range of temperatures and magnetic fields, which is explained by phenomenological scaling analyses of Hall resistivities contribution. Our findings provide not only a general way to prepare the materials possessing skyrmion phase, but also insight into further research to stimulate more degrees of freedom in our inquisitiveness.

arXiv comment14 pages, 4 figures

References in corpus (16)

• Skyrmion Lattice in a Chiral Magnet
• Anomalous Hall effect
• Spontaneous Skyrmion Ground States in Magnetic Metals
• Topological Hall effect in the A-phase of MnSi
• Spin Transfer Torques in MnSi at Ultra-low Current Densities
• Emergent electrodynamics of skyrmions in a chiral magnet
• Unusual Hall Effect Anomaly in MnSi Under Pressure
• A theory on skyrmion size and profile
• Robust formation of skyrmions and topological Hall effect in epitaxial thin films of MnSi
• Spin-orbit torque-driven skyrmion dynamics revealed by time-resolved X-ray microscopy
• Multivariable Scaling for the Anomalous Hall Effect
• Current-Driven Dynamics of Skyrmions Stabilized in MnSi Nanowires Revealed by Topological Hall Effect
• Extended elliptic skyrmion gratings in epitaxial MnSi thin films
• Topological Hall and Spin Hall Effects in Disordered Skyrmionic Textures
• Skyrmion Topological Hall Effect near Room Temperature
• Enhanced Non-Adiabaticity in Vortex Cores due to the Emergent Hall Effect

Cited by in corpus (2)

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