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Título:
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Thickness Dependent Magnetic Anisotropy of Ultrathin LCMO Epitaxial Thin Films
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Autores:
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Nemes, Norbert Marcel ;
García Hernandez, Mar ;
Szatmári, Zsolt ;
Fehér, Titusz ;
Simon, Ferenc ;
Visani, Cristina ;
Peña, Vanessa ;
Miller, Christian ;
Garcia Barriocanal, Javier ;
Bruno, Flavio Yair ;
Sefrioui, Zouhair ;
León Yebra, Carlos ;
Santamaría Sánchez-Barriga, Jacobo
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Tipo de documento:
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texto impreso
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Editorial:
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IEEE-Institute of Electrical and Electronics Engineers, 2009-11
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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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Tipo = Artículo
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Resumen:
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The magnetic properties of La_0.7Ca_0.3Mn_O3 (LCMO) manganite thin films were studied with magnetometry and ferromagnetic resonance as a function of film thickness. They maintain the colossal magnetoresistance behavior with a pronounced metal-insulator transition around 150-200 K, except for the very thinnest films studied (3 nm). Nevertheless, LCMO films as thin as 3 nm remain ferromagnetic, without a decrease in saturation magnetization, indicating an absence of dead-layers, although below approximately 6 nm the films remain insulating at low temperature. Magnetization hysteresis loops reveal that the magnetic easy axes lie in the plane of the film for thicknesses in the range of 4-15 nm. Ferromagnetic resonance studies confirm that the easy axes are in-plane, and find a biaxial symmetry in-plane with two, perpendicular easy axes. The directions of the easy axes with respect to the crystallographic directions of the cubic SrTiO_3 substrate differ by 45 deg in 4- and 15-nm-thick LCMO films.
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En línea:
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https://eprints.ucm.es/id/eprint/33516/1/LeonC35preprint.pdf
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