Incommensurate Spiral Spin Order in CaMn$_2$Bi$_2$ observed via High Pressure Neutron Diffraction

Antonio M. dos Santos; Bianca Haberl; Haozhe Wang; Madalynn Marshall; Weiwei Xie

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arxiv 2312.00397 v1 pith:S5KXUAYZ submitted 2023-12-01 cond-mat.mtrl-sci

Incommensurate Spiral Spin Order in CaMn₂Bi₂ observed via High Pressure Neutron Diffraction

Madalynn Marshall , Haozhe Wang , Antonio M. dos Santos , Bianca Haberl , Weiwei Xie This is my paper

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keywords highpressureorderspinatomsdiffractionmagneticneutron

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High pressure neutron diffraction is employed to investigate the magnetic behavior of CaMn$_2$Bi$_2$ in extreme conditions. In contrast to antiferromagnetic ordering on Mn atoms reported at ambient pressure, our results reveal that at high pressure, incommensurate spiral spin order emerges due to the interplay between magnetism on the Mn atoms and strong spin-orbit coupling on the Bi atoms: sinusoidal spin order is observed at pressures as high as 7.4 GPa. Competing antiferromagnetic order is observed at different temperatures in the partially frustrated lattice. This research provides a unique toolbox for conducting experimental magnetic and spin dynamics studies on magnetic quantum materials via high pressure neutron diffraction.

Incommensurate Spiral Spin Order in CaMn₂Bi₂ observed via High Pressure Neutron Diffraction

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