INVESTIGADORES
GRANJA Leticia Paula
artículos
Título:
Exploiting phase separation in monolithic La0.6Ca0.4MnO3 devices
Autor/es:
L. GRANJA; L. E. HUESO; P. LEVY; N. D. MATHUR
Revista:
APPLIED PHYSICS LETTERS
Editorial:
AMER INST PHYSICS
Referencias:
Lugar: New York; Año: 2013 vol. 103 p. 62404 - 62406
ISSN:
0003-6951
Resumen:
Devices based on mesas were fabricated from thin films of magnetically phase-separated La0.6Ca0.4MnO3. Low-field magnetoresistance arises because the volume fraction of the ferromagnetic metallic phase is large enough for percolation but small enough to permit magnetic decoupling between each mesa and the underlying track. Magnetic domain walls in the antiparallel mesa-track configuration possess a giant resistance-area product of (3?7)10^8 Ohm.m2. This figure represents an 11 order-of-magnitude improvement with respect to the figure for cobalt.
