Magnetic properties of chiral EuIr2P2

D. J. García, V. Vildosola, A. A. Aligia, D. G. Franco, and Pablo S. Cornaglia
Phys. Rev. B 104, 214411 – Published 7 December 2021

Abstract

We present a minimal model that provides a description of the magnetic and thermodynamic properties of EuIr2P2 . The model contains two exchange coupling parameters, which are calculated using density functional theory, and a local easy-axis magnetic anisotropy term. The classical ground state of the system is a generalization of the well known 120 structure observed in triangular antiferromagnets. Monte Carlo simulations show two phase transitions as a function of the temperature. With increasing temperature, the system transitions from the ground state into a high-entropy collinear antiferromagnet, which in turn at higher temperatures presents a second-order transition to a paramagnetic state. A high enough external magnetic field parallel to the anisotropy axis produces a spin-flop transition at low temperatures. The field also reduces the temperature range of stability of the collinear antiferromagnet phase and leads to a single-phase transition as a function of the temperature. The reported behavior of the specific heat, the magnetization, and the magnetic susceptibility is in agreement with the available experimental data. Finally, we present the magnetic phase diagrams for magnetic fields parallel and perpendicular to the easy axis.

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  • Received 23 August 2021
  • Revised 23 October 2021
  • Accepted 24 November 2021

DOI:https://doi.org/10.1103/PhysRevB.104.214411

©2021 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
  1. Physical Systems
Condensed Matter, Materials & Applied Physics

Authors & Affiliations

D. J. García1,2, V. Vildosola3,4, A. A. Aligia1,2,4, D. G. Franco1,2, and Pablo S. Cornaglia1,2,4

  • 1Centro Atómico Bariloche and Instituto Balseiro, CNEA, 8400 Bariloche, Argentina
  • 2Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
  • 3Departamento de Materia Condensada, GIyA, CNEA (1650) San Martín, Provincia de Buenos Aires, Argentina
  • 4Instituto de Nanociencia y Nanotecnología CNEA-CONICET, Argentina

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Issue

Vol. 104, Iss. 21 — 1 December 2021

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