B-site disorder induced Griffiths phase evolution and high magnetocaloric effect in La0.7Sr0.3A0.05Mn0.95O3 (A= Si, Ti)

G. Jagadish Kumar,Ashika Jose, E.P. Jinu, T.T. Saravanan,E. Senthil Kumar,M. Navaneethan, H. Sreemoolanadhan,K. Kamala Bharathi

Materials Research Bulletin（2023）

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摘要

•Ti doped La0.7Sr0.3MnO3 exhibits higher entropy change (1.08 J/kg K) at room temperature and low magnetic field.•Griffiths phase arises as a result of doping either Si or Ti in Mn site.•5 mol% of Si and Ti doping at the mn site of La0.7Sr0.3MnO3 leads to a decrease in Curie temperature (TC) toward room temperature.

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关键词

Magnetocaloric effect,Griffiths phase,Curie temperature

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