Bipolar magnetic switching and large exchange-bias in Fe-substituted SmCrO3

Manu Mohan; Sanjib Nayak; Arnab Pal; P Murugavel

doi:10.1088/1361-648X/acf1ea

Bipolar magnetic switching and large exchange-bias in Fe-substituted SmCrO₃

J Phys Condens Matter. 2023 Aug 31;35(47). doi: 10.1088/1361-648X/acf1ea.

Authors

Manu Mohan¹, Sanjib Nayak¹, Arnab Pal¹, P Murugavel¹

Affiliation

¹ Pervoskite Materials Laboratory, Functional Oxides Research Group (FORG), Department of Physics, Indian Institute of Technology Madras, Chennai 600036, India.

PMID: 37595609
DOI: 10.1088/1361-648X/acf1ea

Abstract

Rare-earth orthochromite is an interesting system in the view of its complex magnetic ordering due to competing interaction between different magnetic ions. Here, Fe-substituted SmCrO₃samples were prepared by solid-state route to investigate their intriguing magnetic properties towards exploring its application potential. The magnetic studies revealed antiferromagnetic (AFM) ordering at Nèel temperature (T_N) ∼ 181 K, magnetic compensation temperatures (T_COMP) at ∼137 K and 50 K, and spin-reorientation temperature (T_SR) at 64 K in SmCr_0.8Fe_0.2O₃sample. Additionally, the system exhibited negative magnetization under field-cooled conditions which allowed the field as well as temperature controllable magnetization switching behavior. Notably, the Fe-substituted SmCrO₃sample displayed a remarkable exchange bias (H_EB) value of ∼1.39 T at 10 K due to the coexistence of ferromagnetic and AFM ordering at different cationic sites. TheM-Hloops recorded under positive and negative field-cooled conditions ruled out the minor-loop effect. Theoretical models applied on the training effect studies confirmed the observed exchange-bias effect.

Keywords: exchange-bias; negative magnetization; orthochromites; spin-reorientation; training effect.