Article,

Magnetic field induced reentrant multipolar ordering in the distorted kagome-lattice antiferromagnet Dy$_3$Ru$_4$Al$_12$

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Phys. Rev. B, 107 (20): 205136 (May 18, 2023)
DOI: 10.1103/PhysRevB.107.205136

Abstract

We report on ultrasonic and magnetocaloric-effect measurements of the hexagonal antiferromagnet Dy3Ru4Al12 having a distorted kagome lattice. We observed a pronounced softening of the transverse modulus, C44, above 30 T applied along 100, indicating an as-yet-unidentified magnetic field induced phase transition. We determined the field-temperature phase diagrams using pulsed magnetic fields up to 55.2 T, applied along 100 and 001. Optimizing crystal-electric-field parameters within the mean-field approximation, we conclude that the enhancement of the field induced phase-transition temperature is due to electric quadrupolar and magnetic octupolar mediated interactions. We propose that the order parameter of the magnetic field induced phase transitions is the electric quadrupole Ozx , facilitated by octupole-mediated interactions.

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