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DOE OSTI · 1674967

Canted Eu magnetic structure in EuMnSb 2

Gong, Dongliang·Huang, Silu·Ye, Feng·Gui, Xin·Zhang, Jiandi·Xie, Weiwei·Jin, Rongying
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Abstract

Magnetic ordering breaks the time-reversal symmetry, greatly impacting material topological properties. Here, we report the investigation of the magnetic properties of the layered EuMnSb 2 , which has two sets of magnetic sublattices. Both the magnetization and electrical resistivity reveal two phase transitions with one at T N,Eu ~21K and the other at T N,Mn ~346K. Single crystal neutron diffraction refinement indicates that both transitions are originated from magnetic ordering. Below T N,Mn , the Mn sublattice forms the C-type antiferromagnetic (AFM) structure with moments [(4.5±0.6)μB at 7 K] pointing along the a axis. Below T N,Eu , the Eu sublattice forms the canted A-type AFM structure with moments [(5.9±0.8)μB at 7 K] lying in the ac plane but pointing (41 ± 1)° away from the a axis. Quantitative analysis indicates that the spin-spin correlation length, while anisotropic, has long-range characteristic in all directions for both the Eu and Mn sublattices.

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75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITYAntiferromagnetismDirac semimetalMagnetization measurementsNeutron diffractionResistivity measurements

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Gong, Dongliang, Huang, Silu, Ye, Feng, Gui, Xin, Zhang, Jiandi, Xie, Weiwei, Jin, Rongying. 2020-06-15. Canted Eu magnetic structure in EuMnSb 2. https://doi.org/10.1103/physrevb.101.224422

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