Anomalous post-annealing effects on magnetic and electrical properties of La0.8Ca0.2MnO3

Chang Seop Hong, Wan Seop Kim, Nam Hwi Hur

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We report anomalous post-annealing effects of La0.8Ca0.2MnO3 under O2 and Ar atmospheres. We have found that the critical temperature (TC) of the as-prepared sample increases after Ar-annealing and decreases upon O2 annealing. The temperature-dependent magnetization data of the as-prepared compound agree well with the sum of those of the O2- and Ar-annealed samples. Colossal magnetoresistance (CMR) below 60 K that reaches to almost 100% is observed in the O2-annealed sample. These unusual results are discussed in terms of global homogenization over the sample and magnetic inhomogeneity induced by the Mn deficiency.

Original languageEnglish
Pages (from-to)359-362
Number of pages4
JournalSolid State Communications
Volume120
Issue number9-10
DOIs
Publication statusPublished - 2001 Nov 2
Externally publishedYes

Fingerprint

Magnetic properties
Electric properties
electrical properties
Annealing
magnetic properties
annealing
Colossal magnetoresistance
Magnetization
homogenizing
critical temperature
Temperature
inhomogeneity
atmospheres
magnetization
temperature

Keywords

  • A. Magnetically orderd materials
  • A. Perovskite Manganites
  • D. Colossal magnetoresistance

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Anomalous post-annealing effects on magnetic and electrical properties of La0.8Ca0.2MnO3 . / Hong, Chang Seop; Kim, Wan Seop; Hur, Nam Hwi.

In: Solid State Communications, Vol. 120, No. 9-10, 02.11.2001, p. 359-362.

Research output: Contribution to journalArticle

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AB - We report anomalous post-annealing effects of La0.8Ca0.2MnO3 under O2 and Ar atmospheres. We have found that the critical temperature (TC) of the as-prepared sample increases after Ar-annealing and decreases upon O2 annealing. The temperature-dependent magnetization data of the as-prepared compound agree well with the sum of those of the O2- and Ar-annealed samples. Colossal magnetoresistance (CMR) below 60 K that reaches to almost 100% is observed in the O2-annealed sample. These unusual results are discussed in terms of global homogenization over the sample and magnetic inhomogeneity induced by the Mn deficiency.

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