Publication Date:
2018-10-20
Description:
Author(s): M. Halder, A. Chacon, A. Bauer, W. Simeth, S. Mühlbauer, H. Berger, L. Heinen, M. Garst, A. Rosch, and C. Pfleiderer Skyrmion lattices in magnetic materials represent long-range magnetic order featuring nontrivial topological winding. Here, magnetization, ac susceptibility, and specific heat data are reported that provide thermodynamic evidence of two disconnected skyrmion lattice phases in the same material, the cubic insulator Cu 2 OSeO 3 . The magnetization and susceptibility demonstrate, moreover, that the two phases are stabilized by two inherently different mechanisms. Whereas the high-temperature skyrmion phase originates in entropic effects driven by thermal fluctuations, the low-temperature skyrmion phase is due to conventional cubic magnetic anisotropies, previously thought to be too weak to be thermodynamically relevant. [Phys. Rev. B 98, 144429] Published Fri Oct 19, 2018
Keywords:
Magnetism
Print ISSN:
1098-0121
Electronic ISSN:
1095-3795
Topics:
Physics
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