Pressure induced structural phase transition and magneto-elastic coupling in Eu doped LaCrO3
Abstract
In this study, we have carried out a detailed high pressure investigation on 5% Eu doped LaCrO3 (ELCO) using synchrotron X-ray diffraction (XRD), micro Raman spectroscopy, and low-temperature magnetization measurements to correlate the structural and magnetic properties under pressure. The high pressure XRD reveals the orthorhombic to rhombohedral structural phase transition around 10.6 GPa. The high pressure Raman data corroborate this result and indicate that the lattice instabilities associated with the low-frequency soft modes play a crucial role in driving this transition. In addition, a pronounced anomaly in the Raman shift and integrated intensity of several Raman modes is observed around 4.5 GPa. By combining the low-temperature magnetization measurements with the anomalies observed in the XRD and Raman data and by comparing with the similar results in LaCrO3 (LCO), a pressure-induced change in the magnetic ground state to antiferromagnetic ordering is predicted.
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BibTeX
@misc{mishra2026pressure,
title = {{Pressure induced structural phase transition and magneto-elastic coupling in Eu doped LaCrO$_3$}},
author = {Asish Kumar Mishra and Mrinmay Sahu and Bhagyashri Giri and Bidisha Mukherjee and Suvashree Mukherjee and Harekrishna Bhunia and Tamalkanti Mukherjee and Sujoy Ghosh and Partha Mitra and Peter Liermann and Goutam Dev Mukherjee},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.19795},
eprint = {2609.19795},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.19795},
}
RIS
TY - UNPB
TI - Pressure induced structural phase transition and magneto-elastic coupling in Eu doped LaCrO_3
AU - Asish Kumar Mishra
AU - Mrinmay Sahu
AU - Bhagyashri Giri
AU - Bidisha Mukherjee
AU - Suvashree Mukherjee
AU - Harekrishna Bhunia
AU - Tamalkanti Mukherjee
AU - Sujoy Ghosh
AU - Partha Mitra
AU - Peter Liermann
AU - Goutam Dev Mukherjee
PY - 2026
DA - 2026/09/17
PB - arXiv
DO - 10.48550/arxiv.2609.19795
UR - https://arxiv.org/abs/2609.19795
AB - In this study, we have carried out a detailed high pressure investigation on 5% Eu doped LaCrO_3 (ELCO) using synchrotron X-ray diffraction (XRD), micro Raman spectroscopy, and low-temperature magnetization measurements to correlate the structural and magnetic properties under pressure. The high pressure XRD reveals the orthorhombic to rhombohedral structural phase transition around 10.6 GPa. The high pressure Raman data corroborate this result and indicate that the lattice instabilities associated with the low-frequency soft modes play a crucial role in driving this transition. In addition, a pronounced anomaly in the Raman shift and integrated intensity of several Raman modes is observed around 4.5 GPa. By combining the low-temperature magnetization measurements with the anomalies observed in the XRD and Raman data and by comparing with the similar results in LaCrO_3 (LCO), a pressure-induced change in the magnetic ground state to antiferromagnetic ordering is predicted.
ER -