Structure, Magnetism and Magnetocaloric Effect in a New Triangular Lattice Compound GdCu(OH)Br

Overview

Journal RSC Adv

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2022 Oct 6

PMID 36199608

Authors

Dong-Er Cheng

Yi-Yan Wang

Yan Sun

Hui Liang

Dan-Dan Wu

Qiuju Li

Xuefeng Sun

Xiao-Yu Yue

Affiliations

Soon will be listed here.

Abstract

A new triangular lattice compound GdCu(OH)Br has been synthesized by the hydrothermal method. The structure, magnetism and magnetocaloric effect of GdCu(OH)Br have been studied by X-ray diffraction, magnetic susceptibility, isothermal magnetization and specific heat measurements. In GdCu(OH)Br, the Cu ions form a Kagome lattice along the plane, and Gd ions are located in the center of hexagonal holes of the Kagome layer. The Cu-sublattice and Gd-sublattice overlap and constitute a magnetic triangular lattice. The temperature dependence of susceptibility and specific heat curves indicate no magnetic transition down to 2 K, suggesting a paramagnetic-like behavior at low temperature. The magnetocaloric effect (MCE) at low temperature has been calculated according to Maxwell's equations. The maximum value of magnetic entropy change -Δ is 26.04 J kg K and adiabatic temperature change Δ is 13.79 K, for a field change of 0-7 T, indicating a potential application of this compound in the field of magnetic refrigeration at low temperature. The influence of 4f-3d interaction on magnetism and MCE is also discussed.

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