RT Journal Article
T1 Thickness Dependent Magnetic Anisotropy of Ultrathin LCMO Epitaxial Thin Films
A1 Nemes, Norbert Marcel
A1 García Hernández, Mar
A1 Szatmári, Zsolt
A1 Fehér, Titusz
A1 Simon, Ferenc
A1 Visani, Cristina
A1 Peña, Vanessa
A1 Miller, Christian
A1 Garcia Barriocanal, Javier
A1 Bruno, Flavio Yair
A1 Sefrioui, Zouhair
A1 León Yebra, Carlos
A1 Santamaría Sánchez-Barriga, Jacobo
AB 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.
PB IEEE-Institute of Electrical and Electronics Engineers
SN 0018-9464
YR 2009
FD 2009-11
LK https://hdl.handle.net/20.500.14352/44762
UL https://hdl.handle.net/20.500.14352/44762
LA eng
NO ©2009 IEEE-Institute of Electrical and Electronics Engineers. N. N. M. acknowledges the “Ramon y Cajal” fellowship of the Spanish Ministry of Science and Education. This work was supported in part by SPIN-MAT06024 C01 and C02 and by Marie-Curie-IRG grant No. 024861, and by OTKA PF63954, K68807 and NK60984.
NO Unión Europea. FP7
NO Ministerio de Educación y Ciencia (MEC), España
NO Programa Ramón y Cajal
NO Acciones Marie Skłodowska-Curie (UE)
NO Hungarian Scientific Research Fund (OTKA), Hungría
DS Docta Complutense
RD 12 abr 2025