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Magnetic behavior of the Re-based double perovskite
Phys. Rev. B 113, 104431 – Published 16 March, 2026
DOI: https://doi.org/10.1103/2ngs-7x82
Abstract
The subtle interplay between spin-orbit coupling, exchange interactions, and cation ordering can lead to exotic magnetic states in transition-metal ions. We report a comprehensive study of the Re-based () ordered double perovskite oxide combining synchrotron x-ray diffraction (XRD), magnetic susceptibility, muon spin relaxation () measurements, and density functional theory (DFT) calculations. XRD reveals that crystallizes in the monoclinic structure (space group ) at low temperature. Magnetic susceptibility data indicate a transition below , with loops showing ferromagnetic-like hysteresis and an unusually high coercive field of 23 kOe at 2 K. Zero-field measurements detect static and spatially disordered internal fields below 12 K, consistent with a canted antiferromagnetic ground state determined by detailed DFT and force-theorem in Hubbard-I calculations. The reduced high-temperature effective moment () and very small static moment () derived from analysis and local-field simulations indicate a decisive role of spin-orbit coupling. Through a combined experimental and computational approach we unambiguously determine the canted antiferromagnetic order in , showing that a very small ordered moment coexists with an exceptionally large coercivity. These results underscore the crucial role of spin-orbit coupling and orbital ordering, providing new insights into magnetism in double perovskites.
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References (70)
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