Pressure-tuning of magnetic transition in a kagome antiferromagnet, YMn6Sn6

Abstract

To investigate the pressure effect on exchange interactions and the magnetic phase of YMn6Sn6, we performed X-ray diffraction and electrical transport measurements at the high pressure up to similar to 18 GPa using diamond anvil cell. Both experimental results confirmed no structural transition, while low-temperature magnetoresistance measurements revealed that the forced-ferromagnetic transition field is significantly suppressed with increasing pressure. These results can be understood as a pressure-induced reduction of the antiferromagnetic exchange interaction, demonstrating that lattice compression under pressure effectively modifies the magnetic ground state of the 166-type Kagome magnet.