Large exchange bias effect in LaCr0.9Ru0.1O3

• Incorporation of Ru4+ into the antiferromagnetic spin structure of LaCrO3.
• Large exchange bias has been observed for 10% Ru doped LaCrO3.
• Coexistence of normal and inverse magnetocaloric effect.

The incorporation of tetravalent Ru (10%) into antiferromagnetic spin structure of LaCrO3 leads to mixed valence states of Cr (Cr2+ and Cr3+). Highly delocalized 4d orbital of Ru induces prominent ferromagnetic (FM) component in antiferromagnetic (AFM) matrix of parent compound. The complex magnetic interaction across the interface of FM and AFM regions gives rise to large exchange bias field (HEB) of about 10 kOe. The inverse and normal magnetocaloric effect for magnetic field up to 50 kOe coexists in a single material due to multiple magnetic phase transitions with temperature.

Highly delocalized 4d orbital of Ru induces prominent ferromagnetic (FM) component in antiferromagnetic (AFM) matrix of parent compound.Figure optionsDownload as PowerPoint slide