Triggering a Metal-insulator Transition in La0.8Sr0.2MnO3 Nanoparticle-decorated Carbon Nanotubes
- Authors
- Lee, Kyu Won; Lee, Cheol Eui; Gedanken, A.; Sominski, E.; Koltypin, Yu.
- Issue Date
- 12월-2011
- Publisher
- KOREAN PHYSICAL SOC
- Keywords
- LSMO nanoparticle-decorated CNTs; Metal-insulator transition; Superpararnagnetism; Kondo effect
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.59, no.6, pp.L3309 - L3313
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY
- Volume
- 59
- Number
- 6
- Start Page
- L3309
- End Page
- L3313
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/110945
- DOI
- 10.3938/jkps.59.3309
- ISSN
- 0374-4884
- Abstract
- We have studied the magnetic and the electric properties of La0.8Sr0.2MnO3 (LSMO) nanoparticle-decorated carbon nanotubes (CNTs). The magnetic susceptibility showed a paramagnetic - superparamagnetic phase transition at T-sp similar to 200 K with a blocking temperature of T-B similar to 120 K, which can be attributed to the LSMO nanoparticles. At T-sp, 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 T-B 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.
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