Year: 2026
Type: article
Abstract: We investigate the effect of Ce3+ substitution on the magnetic ordering and phonon dynamics of the GdCrO3 orthorhombic perovskite. The Ce doped compound exhibits long-range canted antiferromagnetism with Néel transitions, TN at ~ 173 K, accompanied by spin-flip, TSF at ~ 10 K. Ce3+ incorporation drives a modification of the spin-flip transition from the [Formula: see text]configuration to [Formula: see text] inducing a reorientation of the spin axis between the [Formula: see text]and (001) crystallographic planes. This spin reorientation is governed by Zeeman energy and produces pronounced field-induced irreversibility between FCC and FCW magnetization processes. The substituted compound Gd0.9Ce0.1CrO3 (GCCO) exhibits a remarkably large magnetic entropy change, [Formula: see text] ~ 45 –40 J/kg-K for ∆H = 90 − 70 kOe at 3 K among the highest reported for rare-earth orthochromites. The interplay of spin-only magnetocrystalline anisotropy from Cr3+ and spin–orbit–driven magnetic moments of Gd3+ and Ce3+ results in pronounced spin–phonon coupling, manifested through the A1g(6) vibrational mode. The observed temperature-dependent spectral evolution is consistent with behaviour reported in isostructural magnetic perovskites.
Source: Scientific Reports
Authors: Ravi Kiran Dokala, Shaona Das, Subhash Thota
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,690
Funders: Department of Biotechnology, Ministry of Science and Technology, India, Department of Science and Technology, Ministry of Science and Technology, India, Council of Scientific and Industrial Research, India, Ministry of Education, India, Stockholms Universitet, Indian Institute of Technology Guwahati, Directorate for Biological Sciences, Science and Engineering Research Board, North East Centre for Biological Sciences and Healthcare Engineering, Indian Institute of Technology Guwahati
OpenAlex ID: W7150959951