Magnetic phases of the frustrated ferromagnetic spin-trimer system Gd3Ru4Al12 with a distorted kagome lattice structure

S. Nakamura, N. Kabeya, M. Kobayashi, K. Araki, K. Katoh, and A. Ochiai
Phys. Rev. B 107, 014422 – Published 26 January 2023

Abstract

Magnetization and specific heat measurements were conducted on single-crystalline Gd3Ru4Al12, in which magnetic Gd–Al layers with a distorted Kagome lattice structure and nonmagnetic Ru–Al layers are stacked alternately along the c axis. A previous study indicated that the distorted Kagome lattice structure of Gd–Al layers effectively translates into an antiferromagnetic (AFM) triangular lattice in association with ferromagnetic (FM) spin trimerization at low temperatures. The present results indicate that the spin system of Gd3Ru4Al12 has two types of anisotropies: easy-plane-type and easy-axis-type anisotropies. The trimers carry magnetic quadrupole moments when the FM directivity of the component spins is imperfect. The origin of the unusual magnetic anisotropies that were observed can be explained by the magnetic quadrupole interactions that take place between the trimers. The stability of a helical structure in the crystal with inversion-symmetry is discussed.

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  • Received 28 November 2018
  • Revised 10 January 2023
  • Accepted 12 January 2023

DOI:https://doi.org/10.1103/PhysRevB.107.014422

©2023 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

S. Nakamura1,2,*, N. Kabeya2,3, M. Kobayashi3, K. Araki4, K. Katoh4, and A. Ochiai2,3

  • 1Institute for Materials Research, Tohoku University, Katahira, Sendai 980-8577, Japan
  • 2Center for Low Temperature Science, Tohoku University, Katahira, Sendai 980-8577, Japan
  • 3Department of Physics, Tohoku University, Aramaki, Sendai 980-8578, Japan
  • 4Department of Applied Physics, National Defense Academy, Yokosuka 239-8686, Japan

  • *Corresponding author: shintaro.nakamura.c8@tohoku.ac.jp

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Issue

Vol. 107, Iss. 1 — 1 January 2023

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