INVESTIGADORES
LEVY Pablo Eduardo
artículos
Título:
Magnetic dead layer in ferromagnetic manganite nanoparticles
Autor/es:
J. CURIALE, M. GRANADA, H. E. TROIANI, R. D. SÁNCHEZ, A. G. LEYVA, P. LEVY AND K. SAMWER
Revista:
APPLIED PHYSICS LETTERS
Editorial:
AMER INST PHYSICS
Referencias:
Año: 2009 vol. 95 p. 43106 - 43109
ISSN:
0003-6951
Resumen:
We present experimental evidence on the physical origin of a magnetic dead layer MDL inmanganite nanoparticles. The studied nanoparticles constitute the wall of La0.67Sr0.33MnO3 andLa0.67Ca0.33MnO3 manganite nanotubes. Magnetic properties analysis and high resolutiontransmission electron microscopy show a shell of approximately 2 nm thickness with differentproperties from the core. In this shell the atoms are in a noncrystalline array that perfectly explainsthe 50% reduction of the magnetization compared to the bulk. Moreover, we present experimentalevidence that the internal magnetic structure of the MDL is constituted by small ferromagneticclusters in a frustrated configuration. © 2009 American Institute of Physics.
