Página Inicial CNEA Laboratorio TANDAR Página Inicial TANDAR Historia del acelerador TANDAR Web interno Web mail
Inicio » Actividades I+D > Publicaciones 2006 > High resolution determination of ferroma...
artículo con referato
"High resolution determination of ferromagnetic metallic limit in epitaxial La1-xCaxMnO3 films on NdGaO3"
D. Sánchez, L.E. Hueso, L. Granja, P. Levy and N.D. Mathur
Appl. Phys. Lett. 89(14) (2006) 142509/1-3
Abstract
The physical properties of manganites depend strongly on sample morphology, probably due to strain. The authors investigate the influence of NdGaO3 substrates on the limit of the ferromagnetic-metallic phase field in La1-xCaxMnO3, doping with x = 1% resolution. Films with x = 0.40 show a metal-insulator transition, but the ferromagnetic volume fraction is half the spin aligned value. Films with x = 0.41 are similar but the metal-insulator transition is not always seen. Films with 0.42 ≤ x ≤ 0.45 are insulating, and the magnetization is dramatically reduced. The observed phase boundary indicates where to search for enhanced phase separation effects that may be exploited in thin films and devices.
DIVISION MATERIA CONDENSADA
Contacto
Av. Gral Paz y Constituyentes, San Martín, Pcia. de Buenos Aires, Argentina
Tel: (54-11) 6772-7007 - Fax: (54-11) 6772-7121