We report on neutron diffraction, magnetoresistance, magnetization, and magnetic torque measurements under high magnetic field in the helical antiferromagnet CeVGe3. This compound exhibits Kondo lattice coherence and helical antiferromagnetic (AFM) ordering at ambient pressure, similar to the well-studied CeRhIn5. Our measurements reveal that CeVGe3 undergoes a magnetic transition from an incommensurate (ICM) AFM state to an up-up-down-down commensurate (CM) AFM structure, followed by a transition to a novel phase at higher fields. A quantum phase transition occurs around 21.3 T. This rich magnetic field phase diagram closely resembles that of CeRhIn5. Furthermore, angle-dependent magnetoresistance measurements reveal that all transitions in CeVGe3 occur from the field component along the ab plane. These findings highlight the intricate interplay among exchange interactions, crystal field effects, ground state properties, and crystalline symmetries.
@article{arxiv.2412.08740,
title = {Multiple metamagnetic transitions in helical antiferromagnet CeVGe$_3$},
author = {Hanshang Jin and Eun Sang Choi and Hung-Cheng Wu and N. J. Curro and K. Nawa and T. J. Sato and R. Kiyanagi and T. Ohhara and Peter Klavins and Valentin Taufour},
journal= {arXiv preprint arXiv:2412.08740},
year = {2024}
}