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MA: Fachverband Magnetismus
MA 16: Poster I
MA 16.37: Poster
Dienstag, 12. März 2013, 10:30–13:30, Poster D
Exchange Bias in all-Manganite La0.7Sr0.3MnO3 / SrMnO3 / La0.7Sr0.3MnO3 Trilayers — •Markus Jungbauer, Sebastian Hühn, Markus Michelmann, Camillo Ballani, and Vasily Moshnyaga — I. Physikalisches Institut, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen
A great interest to exchange bias phenomenon in artificially layered thin films is caused by fundamental importance of this well-known but still controversially explained effect as well as by its promising applicability in spintronics (TMR and multiferroics). We studied exchange bias for all-manganite La0.7Sr0.3MnO3 / SrMnO3 / La0.7Sr0.3MnO3 trilayers with ferromagnetic La0.7Sr0.3MnO3 (LSMO) and G-type antiferromagnetic SrMnO3 (SMO) layers, grown on (001) SrTiO3 substrates by metalorganic aerosol deposition (MAD). The field shift of the magnetic hysteresis loop HE and the coercitivity HC decay exponentially with temperature, vanishing at T=100 K . HE exhibits a global maximum as a function of the SMO interlayer thickness at tSMO ≈ 4.5 nm . We argue that the EB behaviour can be explained by the interplay of a spinglass state at the interface and theoretically proposed mechanism based on the Dzyaloshinskii-Moriya interaction1. Financial support of EU via FP7 (IFOX) is acknowledged.
[1] S. Dong, et al., Phys. Rev. Lett. 103, 127201 (2009)