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Título:
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Magnetoelastic coupling in La_(0.7)Ca_(0.3)MnO_(3)/BaTiO_(3) ultrathin films
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Autores:
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Alberca, A. ;
Nemes, Norbert Marcel ;
Mompean, F. J. ;
Feher, T. ;
Simón, F. ;
Tornos, J. ;
León Yebra, Carlos ;
Munuera, C. ;
Kirby, B. J. ;
Fitzsimmons, M. R. ;
Hernando Grande, Antonio ;
Santamaría Sánchez-Barriga, Jacobo ;
Gárcia Hernández, M.
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Tipo de documento:
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texto impreso
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Editorial:
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American Physical Society, 2013-10-11
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Electricidad
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Materia = Ciencias: Física: Electrónica
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Materia = Ciencias: Física: Física de materiales
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Materia = Ciencias: Física: Física del estado sólido
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Tipo = Artículo
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Resumen:
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The magnetism of La_(0.7)Ca_(0.3)MnO_(3) (LCMO) epitaxial thin films grown on SrTiO_(3) (STO) and BaTiO_(3) (BTO) substrates is studied using polarized neutron reflectometry (PNR) and ferromagnetic resonance (FMR) techniques. In LCMO/BTO, PNR reveals a strongly suppressed magnetization of 300 kA/m, equivalent to a magnetic moment of 2 ?B/Mn, throughout the LCMO layer, amounting to half the expected value. The largest suppression occurs near the interface with BTO, with magnetization values of 50 kA/m, equivalent to 0.3 ?B/Mn. FMR is observable at 8.9 GHz only around the [110] crystallographic direction in thin LCMO/BTO. The resonance barely shifts as the applied field is rotated away from [110]. The FMR results are analyzed in terms of magnetoelastic anisotropy and compared to LCMO/STO grown under the same conditions. A two-layer magnetization model is proposed, based on strong out-of-plane anisotropy near the BTO interface and shown to qualitatively explain the main characteristics of the FMR results.
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En línea:
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https://eprints.ucm.es/id/eprint/31283/1/LeonC137libre.pdf
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