View in EDS

Structural, magnetic, and dielectric properties of orthorhombic Eu2CoMnO6 double perovskite.

Saved in:
Bibliographic Details
Title: Structural, magnetic, and dielectric properties of orthorhombic Eu2CoMnO6 double perovskite.
Authors: Joshi, Prachi1 (AUTHOR) joshiprachi2102@gmail.com, Modi, Anchit2 (AUTHOR), Shukla, Jyoti1 (AUTHOR), Kapoor, Shivani Khanna1 (AUTHOR), Mishra, Ashutosh1 (AUTHOR)
Source: Materials Letters. Feb2026, Vol. 404, pN.PAG-N.PAG. 1p.
Subjects: Ferromagnetic materials, Magnetic properties, Dielectric properties, Physics, Perovskite, Raman spectroscopy, Ferromagnetism, Solid state chemistry
Abstract: Polycrystalline Eu₂CoMnO₆ (ECMO) was synthesized via the solid-state route and crystallizes in a high-purity orthorhombic Pbnm phase. Field Emission Scanning Electron Microscope (FESEM) analysis reveals uniform micrometer-sized grains, while Raman spectroscopy confirms characteristic (Co/Mn)O₆ octahedral vibrations, indicating a well-ordered lattice. Magnetic measurements show a ferromagnetic transition at Tc ≈ 89 K, with Curie-Weiss fitting yielding effective magnetic (μ eff) ≈ 15.1 μ B /f.u. and Curie-Weiss temperature (θ CW) ≈ 32 K, consistent with dominant Co2+-O2−-Mn4+ superexchange, residual antiferromagnetic (AFM) interactions, and Griffiths-like clusters contributing to local magnetic disorder. M-H loops at 10 K indicate soft ferromagnetism with saturation magnetization (M s) ≈ 117.93 emu/g, remanent magnetization (M r) ≈ 23.148 emu/g, and coercive field (H c) ≈ 0.67 T. Dielectric studies reveal low-frequency interfacial dispersion and a stable high-frequency bulk response. The multifunctional behavior of ECMO arises from the interplay of intrinsic Co Mn ordering and extrinsic microstructural effects. • Eu₂CoMnO₆ crystallizes in a pure orthorhombic Pbnm phase with ordered lattice. • SEM reveals dense microstructure with uniform micrometer-sized grains. • Raman spectra confirm characteristic (Co/Mn)O₆ octahedral vibrational modes. • Ferromagnetic transition at Tc ≈ 89 K arises from Co2+–O2−–Mn4+ superexchange. [ABSTRACT FROM AUTHOR]
Copyright of Materials Letters is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:Polycrystalline Eu₂CoMnO₆ (ECMO) was synthesized via the solid-state route and crystallizes in a high-purity orthorhombic Pbnm phase. Field Emission Scanning Electron Microscope (FESEM) analysis reveals uniform micrometer-sized grains, while Raman spectroscopy confirms characteristic (Co/Mn)O₆ octahedral vibrations, indicating a well-ordered lattice. Magnetic measurements show a ferromagnetic transition at Tc ≈ 89 K, with Curie-Weiss fitting yielding effective magnetic (μ eff) ≈ 15.1 μ B /f.u. and Curie-Weiss temperature (θ CW) ≈ 32 K, consistent with dominant Co2+-O2−-Mn4+ superexchange, residual antiferromagnetic (AFM) interactions, and Griffiths-like clusters contributing to local magnetic disorder. M-H loops at 10 K indicate soft ferromagnetism with saturation magnetization (M s) ≈ 117.93 emu/g, remanent magnetization (M r) ≈ 23.148 emu/g, and coercive field (H c) ≈ 0.67 T. Dielectric studies reveal low-frequency interfacial dispersion and a stable high-frequency bulk response. The multifunctional behavior of ECMO arises from the interplay of intrinsic Co Mn ordering and extrinsic microstructural effects. • Eu₂CoMnO₆ crystallizes in a pure orthorhombic Pbnm phase with ordered lattice. • SEM reveals dense microstructure with uniform micrometer-sized grains. • Raman spectra confirm characteristic (Co/Mn)O₆ octahedral vibrational modes. • Ferromagnetic transition at Tc ≈ 89 K arises from Co2+–O2−–Mn4+ superexchange. [ABSTRACT FROM AUTHOR]
ISSN:0167577X
DOI:10.1016/j.matlet.2025.139615