Speaker
Mr
Saikat Das
(Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Chemin du Musée 3, CH-1700 Fribourg, Switzerland)
Description
We studied the interplay between superconductivity and magnetism in La2-xSrxCuO4 (LSCO)/La0.67Ca0.33MnO3 (LCMO) superlattices (SLs). By varying the Sr content and thus the hole doping in the cuprate layers, three SLs (x=0.0, 0.15 0.30) have been prepared using pulsed laser deposition. Upon Sr doping, the cuprate layers evolve from the insulating parent compound with an AF order of the Cu moments at x=0, over the high temperature superconducting state at x=0.15, to a metallic state where superconductivity is suppressed again at x=0.3. The quality of the samples has been characterized by in-situ Reflection high-energy electron diffraction and X-ray diffraction techniques. The polarized neutron reflectometry on these SLs reveals the existence of a so-called depleted layer with a strongly suppressed ferromagnetic Mn moment on the LCMO side of the interface with a thickness of about 10 Å . On the other hand, with X-ray magnetic circular dichroism measurements we observed an induced Cu moment on the LSCO side of the interface. With X-ray magnetic linear dichroism measurements we also observed the signature of an orbital reconstruction effect of the Cu states at the interfaces of these superlattices.
Primary author
Mr
Saikat Das
(Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Chemin du Musée 3, CH-1700 Fribourg, Switzerland)
Co-authors
Prof.
Christian Bernhard
(Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Chemin du Musée 3, CH-1700 Fribourg, Switzerland)
Dr
Cinthia Piamonteze
(Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland)
Dr
Ivan Marozau
(Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Chemin du Musée 3, CH-1700 Fribourg, Switzerland)
Dr
Jochen Stahn
(Laboratory for Neutron Scattering, Paul Scherrer Institut, CH-5232 Villigen, Switzerland)
Mr
Kaushik Sen
(Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Chemin du Musée 3, CH-1700 Fribourg, Switzerland)
Mr
Miguel Uribe Laverde
(Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Chemin du Musée 3, CH-1700 Fribourg, Switzerland)
Dr
Panagiotis Korelis
(Laboratory for Neutron Scattering, Paul Scherrer Institut, CH-5232 Villigen, Switzerland)
Dr
Thomas Keller
(Forschungsneutronquelle Heinz Maier-Leibnitz (FRM II), D-85748 Garching, Germany)
Dr
Yury Khaydukov
(Forschungsneutronquelle Heinz Maier-Leibnitz (FRM II), D-85748 Garching, Germany)
