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oai:docta.ucm.es:20.500.14352/447622023-08-25T21:01:32Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense author Nemes, Norbert Marcel author García Hernández, Mar author Szatmári, Zsolt author Fehér, Titusz author Simon, Ferenc author Visani, Cristina author Peña, Vanessa author Miller, Christian author Garcia Barriocanal, Javier author Bruno, Flavio Yair author Sefrioui, Zouhair author León Yebra, Carlos author Santamaría Sánchez-Barriga, Jacobo 2023-06-20T03:58:59Z 2023-06-20T03:58:59Z 2009-11 0018-9464 10.1109/TMAG.2008.2001523 https://hdl.handle.net/20.500.14352/44762 http://dx.doi.org/10.1109/TMAG.2008.2001523 http://arxiv.org/abs/0805.2336http://ieeexplore.ieee.org/ 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. eng Thickness Dependent Magnetic Anisotropy of Ultrathin LCMO Epitaxial Thin Films journal article URL https://docta.ucm.es/bitstreams/af400052-bc6b-4f7b-9faa-0655c6d9717c/download File MD5 8071e4ee52a4ebf78944554b9691049b 748831 application/pdf LeonC35preprint.pdf URL https://docta.ucm.es/bitstreams/e6259324-e077-4763-ac31-804ea0d4dbb7/download File MD5 17e623cb57783fc414bf53d0284c6dad 20544 text/plain LeonC35preprint.pdf.txt