Field-Orientation Effect on Ferro-Quadrupole Order in PrTi2Al20

Abstract

Ferro-quadrupole (FQ) order in the non-Kramers ${\Gamma }_3$ doublet system PrTi${}_2$Al${}_{20}$ has been investigated via angle-resolved measurements of the specific heat, rotational magnetocaloric effect, and entropy, under a rotating magnetic field within the $(1\bar{1}0)$ plane. The FQ transition occurring at 2 K is robust when the magnetic field $B$ is applied precisely along the $[111]$ direction. By contrast, the magnetic field of larger than 1 T tilted away from the $[111]$ direction sensitively changes the FQ transition to a crossover. The energy gap between the ground and first-excited states in the FQ order increases remarkably with the magnetic field in $B\parallel [001]$, but hardly depends on the magnetic-field strength, at least up to 5 T, in the field orientation between the $[111]$ and $[110]$ axes. These features can be reproduced by using a phenomenological model for FQ order assuming an anisotropic field-dependent interaction between quadrupoles, which has been recently proposed to explain the field-induced first-order phase transition in PrTi${}_2$Al${}_{20}$. The present study demonstrates the great potential of the field-angle-resolved measurements for evaluating possible scenarios for multipole orders.

arXiv comment5 pages, 5 figures (main text) + 4 pages, 2 figures (supplemental material), accepted for publication in J. Phys. Soc. Jpn

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Cited by in corpus (8)

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• Triple-$q$ quadrupole-octupole order scenario for PrV${}_2$Al${}_{20}$
• Quadrupole partial orders and triple-$q$ states on the face-centered cubic lattice
• Thermal and field-induced transitions in ferroquadrupolar Kondo systems
• First-principles Study of the RKKY Interaction and the Quadrupole Order in the Pr 1-2-20 systems PrT2Al20 (T=Ti, V)
• Anisotropy of the magnetic-field-induced phase pocket in the non-Kramers doublet system PrIr${}_2$Zn${}_{20}$
• Probing magnetic-field-induced multipolar ordering through field-angle-resolved magnetostriction and thermal expansion in PrIr${}_2$Zn${}_{20}$
• L-point quadrupole order under magnetic field in cubic PrIr${}_2$Zn${}_{20}$