Advanced Physical Research

ISSN Print: 2663-8436

ISSN Online: 3105-3548

Advanced Physical Research is an open access Journal, publishing fully peer-reviewed original and review papers as well as brief reports on topics in all areas of theoretical and applied physics. The journal provides a platform for researchers who wish to summarize a field of physics research and share this work as widely as possible. The published papers provide an overview of the main developments on a particular topic, with an emphasis on recent developments, and sketch an outlook on future developments.

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The Pressure-Induced Structural Phase Transition in LaCo_0.5Mn_0.5O₃ Manganite

Published: 18-02-2026

https://doi.org/10.62476/apr.8105

Abstract

The structural and vibrational properties of LaCo_0.5Mn_0.5O₃cation-disordered manganite have been studied using X-ray diffraction and Raman spectroscopy at pressures up to P = 25 GPa. The application of high pressures above P ~5 GPa leads to a gradual structural phase transition from an orthorhombic crystal structure with Pnma symmetry to Imma one, accompanied by anomalies in the behaviour of lattice parameters, unit cell volumes, and some Raman modes under pressure. Pressure dependencies of structural parameters and frequencies of Raman modes for the observed phases of the LaCo_0.5Mn_0.5O₃ manganese oxide were obtained. For each phase, the Birch-Murnaghan equation was solved.