Magnetic properties and atomic structure of La(2/3)Ca(1/3)MnO(3)-YBa(2)Cu(3)O(7) heterointerfaces

Abstract

A heterostructure comprised of a 2.7 nm (7 unit-cell) thick layer of the metallic ferromagnet La(2/3)Ca(1/3)MnO(3) and two 50 nm thick layers of the high-temperature superconductor YBa(2)Cu(3)O(7) epitaxially grown on (100) SrTiO3 by pulsed-laser deposition was characterized by magnetization measurements and spherical-aberration-corrected high-resolution transmission electron microscopy (HRTEM). The saturation magnetization is about half of that in bulk La(2/3)Ca(1/3)MnO(3). A massive reduction of the magnetization previously inferred from sputter-deposited La(2/3)Ca(1/3)MnO(3)-YBa(2)Cu(3)O(7) heterostructures can be ruled out. HRTEM image analysis, combined with image simulation and a focus series reconstruction, revealed atomically sharp epitaxial structures with stacking sequences -(La,Ca)O-CuO2- and -BaO-MnO- at the top and bottom interface.

to appear in Applied Physics Letters

References in corpus (6)

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• Pulsed laser deposition growth of heteroepitaxial YBa2Cu3O7/La0.67Ca0.33MnO3 superlattices on NdGaO3 and Sr0.7La0.3Al0.65Ta0.35O3 substrates
• Induced Ferromagnetism at BiFeO3/YBa2Cu3O7 Interfaces
• Superconductor to Mott insulator transition in YBa${}_2$Cu${}_3$O${}_7$/LaCaMnO${}_3$ heterostructures
• Interfacial effects revealed by ultrafast relaxation dynamics in BiFeO${}_3$/YBa${}_2$Cu${}_3$O${}_7$ bilayers