TITLE

Magnetic dead layer in ferromagnetic manganite nanoparticles

AUTHOR(S)
Curiale, J.; Granada, M.; Troiani, H. E.; Sánchez, R. D.; Leyva, A. G.; Levy, P.; Samwer, K.
PUB. DATE
July 2009
SOURCE
Applied Physics Letters;7/27/2009, Vol. 95 Issue 4, p043106
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We present experimental evidence on the physical origin of a magnetic dead layer (MDL) in manganite nanoparticles. The studied nanoparticles constitute the wall of La0.67Sr0.33MnO3 and La0.67Ca0.33MnO3 manganite nanotubes. Magnetic properties analysis and high resolution transmission electron microscopy show a shell of approximately 2 nm thickness with different properties from the core. In this shell the atoms are in a noncrystalline array that perfectly explains the 50% reduction of the magnetization compared to the bulk. Moreover, we present experimental evidence that the internal magnetic structure of the MDL is constituted by small ferromagnetic clusters in a frustrated configuration.
ACCESSION #
43494229

 

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