TY - JOUR
T1 - Triggering a Metal-insulator Transition in La0:8 Sr0:2 MnO3 Nanoparticle-decorated Carbon Nanotubes
AU - Lee, Kyu Won
AU - Lee, Cheol Eui
AU - Gedanken, A.
AU - Sominski, E.
AU - Koltypin, Yu
PY - 2011/12/15
Y1 - 2011/12/15
N2 - We have studied the magnetic and the electric properties of La0:8Sr0:2MnO3 (LSMO) nanoparticle-decorated carbon nanotubes (CNTs). The magnetic susceptibility showed a para- magnetic - superparamagnetic phase transition at TSP ~ 200 K with a blocking temperature of TB ~ 120 K, which can be attributed to the LSMO nanoparticles. At TSP, the charge transport taking place through the CNTs network showed a metal-insulator transition (MIT) characteristic of the LSMO nanoparticles, indicating a concomitant MIT in the CNTs triggered by the LSMO nanoparticles. In the metallic phase, the charge transport appears to be dominated by a 2D weak localization effect, which at temperatures below TB was seen to be somewhat suppressed by the internal field. At temperatures below 50 K, a Kondo effect dominates the electric and the magnetic properties.
AB - We have studied the magnetic and the electric properties of La0:8Sr0:2MnO3 (LSMO) nanoparticle-decorated carbon nanotubes (CNTs). The magnetic susceptibility showed a para- magnetic - superparamagnetic phase transition at TSP ~ 200 K with a blocking temperature of TB ~ 120 K, which can be attributed to the LSMO nanoparticles. At TSP, the charge transport taking place through the CNTs network showed a metal-insulator transition (MIT) characteristic of the LSMO nanoparticles, indicating a concomitant MIT in the CNTs triggered by the LSMO nanoparticles. In the metallic phase, the charge transport appears to be dominated by a 2D weak localization effect, which at temperatures below TB was seen to be somewhat suppressed by the internal field. At temperatures below 50 K, a Kondo effect dominates the electric and the magnetic properties.
KW - Kondo effect
KW - LSMO nanoparticle-decorated CNTs
KW - Metal-insulator transition
KW - Superparamagnetism
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U2 - 10.3938/jkps.59.3309
DO - 10.3938/jkps.59.3309
M3 - Letter
AN - SCOPUS:83455195354
VL - 59
SP - L3309-L3313
JO - Journal of the Korean Physical Society
JF - Journal of the Korean Physical Society
SN - 0374-4884
IS - 6
ER -