Title :
Manganese Deficiency in MnSi Single Crystal and Skyrmion Pinning
Author :
Ou-Yang, T.Y. ; Shu, G.J. ; Hu, C.D. ; Chou, F.C.
Author_Institution :
Dept. of Phys., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
The dc magnetization and ac spin susceptibility measurement results of MnxSi single crystals with x ≈ 0.96-1 are reported. Magnetic phase diagrams for MnxSi of different Mn deficiency levels are mapped and compared. We provide strong evidence that the existence of manganese deficiency is common in the MnSi single crystals due to the high Mn vapor loss during growth, and the Mn deficiencies could be used as pinning centers to stabilize the Skyrmion phase within the magnetic field-temperature phase space.
Keywords :
crystal growth from solution; ferromagnetic-paramagnetic transitions; magnetic susceptibility; magnetisation; manganese alloys; silicon alloys; skyrmions; Mn deficiency; MnxSi; MnSi single crystal; ac spin susceptibility; dc magnetization; magnetic field-temperature phase space; magnetic phase diagram; manganese deficiency; pinning center; skyrmion phase; skyrmion pinning; Crystals; Lattices; Magnetic susceptibility; Manganese; Perpendicular magnetic anisotropy; Silicon; Defect; Dzyaloshinsky???Moriya (DM) interaction; Skyrmion; itinerant ferromagnetism;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2014.2322603
