Interface induced exchange bias effect in La0.67Sr0.33MnO3/SrIrO3 multilayer

Publication date: Available online 11 February 2019Source: Physics Letters AAuthor(s): Rachna Chaurasia, K.C. Kharkwal, A.K. PramanikAbstractEpitaxial superlattices of ferromagnetic/paramagnetic La0.67Sr0.33MnO3/SrIrO3 materials have been prepared on SrTiO3 (100) substrate using pulse laser deposition technique. An unexpected onset of interface magnetic interaction has been observed around 40 K. Interestingly, magnetic exchange bias effect has been observed in both field cooled and zero field cooled magnetization loops, however, the shifting of loop is opposite in both measurements. Exchange bias field vanishes as temperature increases to interface magnetic ordering temperature. Moreover, exchange bias field is found to decrease with increasing cooling field. We believe that tuning of magnetic exchange at interface during field cooling induces this evolution in nature of exchange bias field.

Source: Physics Letters A - February 12, 2019 Category: Physics Source Type: research