Magnetic structure of Ce $_{2}$ MgGe $_{2}$ with the Shastry-Sutherland lattice

Hirose, Yusuke; Honda, Fuminori*; Settai, Rikio*; Nakajima, Taro*; Saito, Hiraku*

Ce $_{$_{2}$}$ MgGe $_{2}$ crystallizes in the tetragonal Mo $_{2}$ FeB $_{2}$ type structure, where Ce atoms form a frustrated arrangement, the Shastry-Sutherland lattice (SSL). The compound exhibits an antiferromagnetic ordering at TN=9.5 K and a complex magnetic phase diagram. To investigate the magnetic structure, we performed neutron scattering measurements on a single crystalline Ce $_{2}$ MgGe $_{2}$ . A magnetic scattering, which grows below TN, is observed on a nuclear scattering, meaning that a magnetic propagation vector is zero. The spin-polarized neutron scattering experiment reveals that the magnetic moment of Ce atoms is aligned in the c plane. From the neutron scattering measurement, we determine the magnetic structure of Ce $_{2}$ MgGe $_{2}$ with an ordered moment of about 1.5mB, which is almost consistent with the saturated magnetic moment.

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発表会議名	:	Workshop on Polarized Neutron Sciences and Technology
開催年月	:	2024/10
開催都市	:	Sendai
開催国	:	Japan
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Magnetic structure of CeMgGe with the Shastry-Sutherland lattice

Magnetic structure of Ce $_{2}$ MgGe $_{2}$ with the Shastry-Sutherland lattice