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DS: Fachverband Dünne Schichten

DS 45: Thin Film Properties: Structure, Morphology and Composition III

DS 45.6: Vortrag

Freitag, 20. März 2020, 10:45–11:00, CHE 89

Magneto-dielectric Effect in Relaxor Dipolar Glassy Tb₂CoMnO₆ Film — •Rajesh Mandal^1,2, Mohit Chandra³, Vladimir Roddatis⁴, Malvika Tripathi³, Ram Janay Choudhary³, and Vasily Moshnyaga¹ — ¹Department of Physics, Indian Institute of Science Education and Research, Pune 411008, India — ²Erstes Physikalisches Institut, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany — ³UGC-DAE Consortium for Scientific Research, Indore Centre, University Campus, Khandwa Road, Indore 452017, India — ⁴Institut für Materialphysik, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany

Relaxor ferroelectrics are recognized as a family of disordered or partially ordered materials that are classified as a special class of dipolar glass with the formation of weakly interacting polarized nano domains (PNR) bellow a certain temperature. Here we report the observation of magneto-dielectrically coupled ferroelectric relaxation at quite high temperature (200K) in Tb₂CoMnO₆/STO(100) double perovskite thin film. Partially B site disordered film has been grown by means of a metal-organic aerosol deposition (MAD) technique. This material is reported as ferromagnetic insulator with TC around 90K. Here we observe an enhanced transition temperature of 110K due to in plane strain. The deviation from the Curie-Weiss law far above TC indicates the development of short range spin correlation which is getting coupled with the electric dipoles present in the system.