期刊
PHYSICAL REVIEW B
卷 97, 期 21, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.97.214402
关键词
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资金
- International Max Planck Research School for Chemistry and Physics of Quantum Materials (IMPRS-CPQM)
- Science and Engineering Research Board of India
- German Research Foundation (DFG) [SFB 1143, SPP 2137]
By means of powder neutron diffraction we investigate changes in the magnetic structure of the coplanar noncollinear antiferromagnet Mn3Ge caused by an application of hydrostatic pressure up to 5 GPa. At ambient conditions the kagome layers of Mn atoms in Mn3Ge order in a triangular 120 degrees spin structure. Under high pressure the spins acquire a uniform out-of-plane canting, gradually transforming the magnetic texture to a noncoplanar configuration. With increasing pressure the canted structure fully transforms into the collinear ferromagnetic one. We observed that magnetic order is accompanied by a noticeable magnetoelastic effect, namely, spontaneous magnetostriction. The latter induces an in-plane magnetostrain of the hexagonal unit cell at ambient pressure and flips to an out-of-plane strain at high pressures in accordance with the change of the magnetic structure.
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