|
Título:
|
Long-range ferromagnetic order in LaCoO3-delta epitaxial films due to the interplay of epitaxial strain and oxygen vacancy ordering
|
|
Autores:
|
Mehta, V. V. ;
Biskup Zaja, Nevenko ;
Jenkins, C. ;
Arenholz, E. ;
Varela del Arco, María ;
Suzuki, Y.
|
|
Tipo de documento:
|
texto impreso
|
|
Editorial:
|
American Physical Society, 2015-04-23
|
|
Dimensiones:
|
application/pdf
|
|
Nota general:
|
info:eu-repo/semantics/openAccess
|
|
Idiomas:
|
|
|
Palabras clave:
|
Estado = Publicado
,
Materia = Ciencias: Física: Electricidad
,
Materia = Ciencias: Física: Electrónica
,
Tipo = Artículo
|
|
Resumen:
|
We demonstrate that a combination of electronic structure modification and oxygen vacancy ordering can stabilize a long-range ferromagnetic ground state in epitaxial LaCoO_(3) thin films. Highest saturation magnetization values are found in the thin films in tension on SrTiO_(3) and (La,Sr)(Al,Ta)O_(3) substrates and the lowest values are found in thin films in compression on LaAlO_(3). Electron microscopy reveals oxygen vacancy ordering to varying degrees in all samples, although samples with the highest magnetization are the most defective. Element-specific x-ray absorption techniques reveal the presence of high spin Co^(2+) and Co^(3+) as well as low spin Co^(3+) in different proportions depending on the strain state. The interactions among the high spin Co ions and the oxygen vacancy superstructure are correlated with the stabilization of the long-range ferromagnetic order.
|
|
En línea:
|
https://eprints.ucm.es/id/eprint/30740/1/VarelaArcoM%2001%20libre.pdf
|
