Electron spin resonance study of the La0.8Sr 0.2MnO3 nanoparticle-decorated carbon nanotubes

Dowan Kim, Kyu Won Lee, E. H. Choi, Cheol Eui Lee

Research output: Contribution to journalArticlepeer-review

Abstract

We have studied La0.8Sr0.2MnO3 (LSMO) nanoparticle-decorated carbon nanotubes (CNTs) by means of the electron spin resonance (ESR) spectroscopy in view of our previous work on the magnetic and electrical properties of the system. One of the line components of the ESR spectrum reflected a paramagnetic-superparamagnetic phase transition at T SP∼200 K, which is accompanied by a concomitant metal-insulator transition (MIT) associated with charge transport taking place through the CNTs network triggered by the LSMO nanoparticles. On the other hand, another ESR line component revealed anomalies at TWL∼170 K as well, attributable to a 2D weak localization effect of the spin/charge carriers. Thus, magnetic interactions and dynamics of the distinct spin species were sensitively reflected in the LSMO-CNTs system.

Original languageEnglish
Pages (from-to)142-144
Number of pages3
JournalMaterials Research Bulletin
Volume59
DOIs
Publication statusPublished - 2014 Nov

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (Project No. 2013057555 , Proton Uses Program 2014M2B2A4030835 , and NRF-2010-0027963 ). The measurements at the Korean Basic Science Institute (KBSI) are acknowledged.

Keywords

  • A. Magnetic materials
  • D. Electronic paramagnetic resonance (EPR)

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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