Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/24886
Title: Structural and functional characterization of (110)-oriented epitaxial La2/3Ca1/3MnO3 electrodes and SrTiO3 tunnel barriers
Author: Cañero Infante, Ingrid
Sánchez Barrera, Florencio
Fontcuberta i Griñó, Josep
Fusil, S.
Bouzehouane, K.
Herranz Casabona, Gervasi
Barthelemy, A.
Estradé Albiol, Sònia
Arbiol i Cobos, Jordi
Peiró Martínez, Francisca
Mossanek, R. J. O.
Abbate, M.
Wojcik, M.
Keywords: Propietats magnètiques
Superfícies (Física)
Interfícies (Ciències físiques)
Magnetic properties
Surfaces (Physics)
Interfaces (Physical sciences)
Issue Date: 3-May-2007
Publisher: American Institute of Physics
Abstract: La2/3Ca1/3MnO3 (LCMO) films have been deposited on (110)-oriented SrTiO3 (STO) substrates. X-ray diffraction and high-resolution electron microscopy reveal that the (110) LCMO films are epitaxial and anisotropically in-plane strained, with higher relaxation along the [1¿10] direction than along the [001] direction; x-ray absorption spectroscopy data signaled the existence of a single intermediate Mn3+/4+ 3d-state at the film surface. Their magnetic properties are compared to those of (001) LCMO films grown simultaneously on (001) STO substrates It is found that (110) LCMO films present a higher Curie temperature (TC) and a weaker decay of magnetization when approaching TC than their (001) LCMO counterparts. These improved films have been subsequently covered by nanometric STO layers. Conducting atomic-force experiments have shown that STO layers, as thin as 0.8 nm, grown on top of the (110) LCMO electrode, display good insulating properties. We will show that the electric conductance across (110) STO layers, exponentially depending on the barrier thickness, is tunnel-like. The barrier height in STO (110) is found to be similar to that of STO (001). These results show that the (110) LCMO electrodes can be better electrodes than (001) LCMO for magnetic tunnel junctions, and that (110) STO are suitable insulating barriers.
Note: Reproducció del document publicat a: http://dx.doi.org/10.1063/1.2723192
It is part of: Journal of Applied Physics, 2007, vol. 101, núm. 9, p. 093902/1-093902/8
Related resource: http://dx.doi.org/10.1063/1.2723192
URI: http://hdl.handle.net/2445/24886
ISSN: 0021-8979
Appears in Collections:Articles publicats en revistes (Electrònica)

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