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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/14243
Title: Polarized neutron reflectometry study of the magnetization reversal process in YBa2Cu3O7/La2/3Ca 1/3MnO3 superlattices grown on SrTiO3 substrates
Authors: Hoppler J.
Fritzsche H.
Malik, Vivek K.K.
Stahn J.
Cristiani G.
Habermeier H.-U.
Rössle M.
Honolka J.
Enders A.
Bernhard C.
Published in: Physical Review B - Condensed Matter and Materials Physics
Abstract: Using polarized neutron reflectometry we investigated the reversal of the magnetization of a high- Tc superconductor/ferromagnet superlattice that consists of eight bilayers of YBa2 Cu3 O7 (25.6 nm) / La2/3 Ca1/3 MnO3 (25.6 nm) grown on a SrTiO3 substrate. The measurements were performed during a magnetization hysteresis loop at 5 K. We obtained evidence that the reversal in the vicinity of the coercive field proceeds via the switching of micrometer-sized magnetic domains that are considerably larger than the typical domains of La2/3 Ca1/3 MnO3. Furthermore, these large magnetic domains appear to be more strongly correlated along the vertical direction of the superlattice than along the lateral one. We provide evidence that this unusual behavior may be induced by the SrTiO3 substrate which undergoes a series of structural phase transitions, some of which give rise to the formation of micrometer-sized surface facets that are tilted with respect to each other. These facets and the resulting strain fields are transmitted throughout the superlattice and thus may act as templates for the large magnetic domains in the La2/3 Ca1/3 MnO3 layers whose magnetic properties are very susceptible to the lattice strain. © 2010 The American Physical Society.
Citation: Physical Review B - Condensed Matter and Materials Physics (2010), 82(17): -
URI: https://doi.org/10.1103/PhysRevB.82.174439
http://repository.iitr.ac.in/handle/123456789/14243
Issue Date: 2010
ISSN: 10980121
Author Scopus IDs: 25633994200
7102033943
24758795000
6602107663
7004043001
7005220678
25634630900
22634177000
7005782890
16030481900
Author Affiliations: Hoppler, J., Department of Physics, Fribourg Center for Nanomaterials, University of Fribourg, Chemin du Musée 3, CH-1700 Fribourg, Switzerland, Laboratory for Neutron Scattering, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
Fritzsche, H., National Research Council Canada, Canadian Neutron Beam Centre, Chalk River Laboratories, Chalk River, ON K0J 1J0, Canada
Malik, V.K., Department of Physics, Fribourg Center for Nanomaterials, University of Fribourg, Chemin du Musée 3, CH-1700 Fribourg, Switzerland
Stahn, J., Laboratory for Neutron Scattering, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
Cristiani, G., Max-Plank-Institut für Festkörperforschung Stuttgart, D-70569 Stuttgart, Germany
Habermeier, H.-U., Max-Plank-Institut für Festkörperforschung Stuttgart, D-70569 Stuttgart, Germany
Rössle, M., Department of Physics, Fribourg Center for Nanomaterials, University of Fribourg, Chemin du Musée 3, CH-1700 Fribourg, Switzerland
Honolka, J., Max-Plank-Institut für Festkörperforschung Stuttgart, D-70569 Stuttgart, Germany
Enders, A., Max-Plank-Institut für Festkörperforschung Stuttgart, D-70569 Stuttgart, Germany
Bernhard, C., Department of Physics, Fribourg Center for Nanomaterials, University of Fribourg, Chemin du Musée 3, CH-1700 Fribourg, Switzerland
Corresponding Author: Hoppler, J.; Department of Physics, Fribourg Center for Nanomaterials, University of Fribourg, Chemin du Musée 3, CH-1700 Fribourg, Switzerland; email: christian.bernhard@unifr.ch
Appears in Collections:Journal Publications [PH]

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