Interplay between quadrupolar and magnetic interactions in 5d1 double perovskite Ba2MgReO6 under pressure
Abstract
We measured the electrical resistivity, AC magnetic susceptibility, and specific heat of the cubic double perovskite Ba2MgReO6 under pressure. The application of pressure leads to a gradual increase in the transition temperature to the canted antiferromagnetic order, while the quadrupolar order is suppressed above 5 GPa, at which a collinear antiferromagnetic state appears. The obtained unit cell volume-temperature phase diagram for the compound as well as the related compounds suggests that Ba2MgReO6 exists near the phase boundary between the noncollinear and the collinear antiferromagnetic order with multipole decrees of freedom.
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