File:MnSiGe magnetic phase diagram2.png

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Description Magnetic state diagram of MnSi1−xGex. Schematics of topological multiple-q spin textures and two-step magnetic transitions in MnSi1−xGex. a Spin configurations of two-dimensional skyrmion lattice (2D SkL), which is a hexagonal array of skyrmion cylinders. It is characterized by three helical modulation vectors (q1+q2+q3=0) perpendicular to external magnetic field H. b Spin configurations of tetrahedral-4q hedgehog lattice (4q-HL), which is described by four q-vectors pointing in the apical directions of a regular tetrahedron. Those q-vectors are fixed along 〈111〉 crystal axes at zero H. Hedgehogs and anti-hedgehogs are at face-centered-cubic positions as illustrated in the bottom right green box representing the magnetic unit cell. c Spin configurations of cubic-3q hedgehog lattice (3q-HL), which is described by three orthogonal q-vectors, which are pinned along 〈100〉 crystal axes at zero H. In a–c the red (blue) arrows drawn in each spin texture represent up (down) magnetic moments. d Variation of phase boundary between ferromagnetic and helimagnetically ordered states as a function of magnetic field H, temperature T, and x in MnSi1−xGex. Red, green, and blue color denote 3q-HL, 4q-HL, and helical(H)/SkL states, respectively. The variation of magnetic transition temperature is indicated by the black line on the bottom plane.
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Source https://www.nature.com/articles/s41467-019-08985-6
Author Y. Fujishiro et al.
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current09:28, 26 July 2020Thumbnail for version as of 09:28, 26 July 2020606 × 1,644 (526 KB)Materialscientist{{Information |description=Magnetic state diagram of MnSi<sub>1−x</sub>Ge<sub>x</sub>. Schematics of topological multiple-q spin textures and two-step magnetic transitions in MnSi<sub>1−x</sub>Ge<sub>x</sub>. a Spin configurations of two-dimensional skyrmion lattice (2D SkL), which is a hexagonal array of skyrmion cylinders. It is characterized by three helical modulation vectors (q1+q2+q3=0) perpendicular to external magnetic field H. b Spin configurations of tetrahedral-4q hedgehog lattice...
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