Neutron diffraction study of the chiral magnet MnGe

作者：Makarova O L^*; Tsvyashchenko A V; Andre G; Porcher F; Fomicheva L N; Rey N; Mirebeau I

来源：Physical Review B, 2012, 85(20): 205205.

DOI：10.1103/PhysRevB.85.205205

The magnetic structure of cubic MnGe has been determined by powder neutron diffraction. MnGe has a helical spin structure with a propagation vector k = (0,0, zeta), where zeta = 0.107(5) just below the transition temperature T-N = 170 K. The zeta value increases upon cooling and locks in to the value of 0.167(4) below 30 K. The moment value is 2.3(5)mu(B) at 2 K. The onset of the magnetic order is connected with a symmetry lowering from cubic to orthorhombic.

• 出版日期2012-5-14
• 单位中国地震局