Positive exchange-bias and giant vertical hysteretic shift in La0.3Sr0.7FeO3/SrRuO3 bilayers

• DOI: 10.1038/srep04138
• Publication Date: 2014-02-26T10:03:00Z
• Authors: Rakesh Rana; Parul Pandey; R. P. Singh; D. S. Rana
• Keywords: Exchange bias; Superexchange

The exchange-bias effects in the mosaic epitaxial bilayers of itinerant ferromagnet (FM) SrRuO3 and antiferromagnetic (AFM) charge-ordered La(0.3)Sr(0.7)FeO3 were investigated. An uncharacteristic low-field positive exchange bias, a cooling-field driven reversal to negative layer thickness optimised unusual vertical magnetization shift all novel facets bias realized for first time magnetic oxides. successive training induces transition from regime with changes domain configurations. These observations are well corroborated by hysteretic loop asymmetries which display modifications AFM spin correlations. exotic features emphasize key role i) disorder induced subtle interplay competing AFM-superexchange FM double at biased interface and, ii) irrecoverable alterations structure.