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

doi:10.1016/j.materresbull.2014.06.030

Electron spin resonance study of the La_0.8Sr _0.2MnO₃ nanoparticle-decorated carbon nanotubes

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

Research output: Contribution to journal › Article › peer-review

Abstract

We have studied La_0.8Sr_0.2MnO₃ (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 T_WL∼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 language	English
Pages (from-to)	142-144
Number of pages	3
Journal	Materials Research Bulletin
Volume	59
DOIs	https://doi.org/10.1016/j.materresbull.2014.06.030
Publication status	Published - 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

Access to Document

10.1016/j.materresbull.2014.06.030

Cite this

@article{4423ec2dc4214585883a1f5c5701d876,

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

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.",

keywords = "A. Magnetic materials, D. Electronic paramagnetic resonance (EPR)",

author = "Dowan Kim and Lee, {Kyu Won} and Choi, {E. H.} and Lee, {Cheol Eui}",

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.",

year = "2014",

month = nov,

doi = "10.1016/j.materresbull.2014.06.030",

language = "English",

volume = "59",

pages = "142--144",

journal = "Materials Research Bulletin",

issn = "0025-5408",

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TY - JOUR

T1 - Electron spin resonance study of the La0.8Sr 0.2MnO3 nanoparticle-decorated carbon nanotubes

AU - Kim, Dowan

AU - Lee, Kyu Won

AU - Choi, E. H.

AU - Lee, Cheol Eui

N1 - 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.

PY - 2014/11

Y1 - 2014/11

N2 - 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.

AB - 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.

KW - A. Magnetic materials

KW - D. Electronic paramagnetic resonance (EPR)

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DO - 10.1016/j.materresbull.2014.06.030

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EP - 144

JO - Materials Research Bulletin

JF - Materials Research Bulletin

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