Theoretical considerations on the transport property of La1-xCaxMnO3 in the paramagnetic regime

H. Yi, Chang Seop Hong, N. H. Hur

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The transport properties of La1-xCaxMnO3 single crystal in the paramagnetic state is investigated from both the theoretical and the experimental point of view. The temperature dependence of the resistivity calculated by using the Monte Carlo technique within the framework of the double-exchange model shows a sharp peak structure and a large magnetoresistance under the application of the magnetic field in the vicinity of the metal-insulator transition temperature, TMI. The experimental result for the resistivity can be fitted well with both a variable-range hopping (VRH) and a small-polaron hopping (SPH) conduction in the paramagnetic state, whereas the Monte Carlo simulation works well with a VRH model but displays some deviations close to TMI with a SPH model. This is largely due to poor knowledge of the lattice effect in the double-exchange model. On the basis of our analysis on the transport property above TMI, we propose that both the spin-disorder scattering and the lattice distortion should be considered to explain the nature of the localization in the paramagnetic regime.

Original languageEnglish
Pages (from-to)579-583
Number of pages5
JournalSolid State Communications
Volume114
Issue number11
DOIs
Publication statusPublished - 2000 May 12
Externally publishedYes

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Transport properties
transport properties
Gene Conversion
electrical resistivity
Metal insulator transition
Magnetoresistance
Superconducting transition temperature
transition temperature
insulators
Single crystals
disorders
Scattering
Magnetic fields
deviation
conduction
temperature dependence
single crystals
scattering
magnetic fields
metals

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Theoretical considerations on the transport property of La1-xCaxMnO3 in the paramagnetic regime. / Yi, H.; Hong, Chang Seop; Hur, N. H.

In: Solid State Communications, Vol. 114, No. 11, 12.05.2000, p. 579-583.

Research output: Contribution to journalArticle

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