2025/12/28 by S. Das, Das, Shaona, Ravi Kiran Dokala +3
Materials Science · #Multiferroics and related materials #Heusler alloys: electronic and magnetic properties #Magnetic and transport properties of perovskites and related materials
paper · doi:10.48550/arxiv.2512.22891
We report the influence of Ce3+ substitution on the magnetic structures and phonon dynamics in SmCrO3 perovskites. Magnetic landscapes are spanned by long-range canted anti-ferromagnetism, AFM with Neel temperatures ∼196 K accompanied by spin-reorientation transitions, TSRPT at 42 K. In Sm0.9Ce0.1CrO3 (SCCO), Ce3+ substitution at Sm3+ sites transform the weak ferromagnetic (FM) Γ4 state into robust AFM Γ1 configuration through a gradual crossover. Such coexistence of magnetic spin configurations Γ1(AFM) to Γ4 (WFM) results in the enhanced high coercive field and a pronounced exchange bias-field, HEB ∼ 2 kOe. Spin-only driven magneto-crystalline anisotropy of Cr3+ and spin-orbit driven magnetic moment in Sm3+, and Ce3+ exhibits spin-phonon coupling through A1g(6) mode in SCCO are consistent with the temperature dependent spectral features of the isostructural magnetic systems and quite significant in SCCO which is in accordance with the higher structural distortion in SCCO. These results demonstrate that site-specific R3+ substitution modulates lattice distortions, spin-phonon coupling, and spin-orbit interactions, offering pathways to optimize perovskites for diverse spintronic applications.