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TRANSPORT PROPERTIES OF (Nd0.67In0.33)1-xSrxMnO3±dddd COMPOUNDS

N. Cornei1, M.-L. Craus2,*

Affiliation

  1. University “Al. Cuza”, Faculty of Chemistry, Blvd. Carol I 11, 700506 Iasi, Romania
  2. National Institute for Research and Development for Technical Physics - TPI Iasi, Blvd D. Mangeron 47, 700050 Iasi, Romania

Abstract

The structure, magnetic and transport characteristics of (Nd0.67In0.33)1-xSrxMnO3±d compounds (where x = 0.2, 0.35 and 0.50), obtained by sol-gel method, were investigated between 77 and 600 K. It was observed that: (1) cubic and tetragonal phases appear for x=0.2 and, respectively, 0.2 < x £ 0.5, (2) there is a significant increase of the chemical disorder, accompanied by a decrease of the observed tolerance factor with the Sr concentration, (3) for Sr concentration corresponding to x = 0.5 the specific magnetic moment of the sample sharply decreases (more than ten times) and (4) the transition temperature from the metallic to the semiconductor state decreases with the increase in Sr concentration in the samples..

Keywords

Rare-earth manganites, Sol-gel method, X-ray, Specific magnetization, Transport phenomena.

Submitted at: Oct. 6, 2003
Accepted at: March 15, 2004

Citation

N. Cornei, M.-L. Craus, TRANSPORT PROPERTIES OF (Nd0.67In0.33)1-xSrxMnO3±dddd COMPOUNDS, Journal of Optoelectronics and Advanced Materials Vol. 6, Iss. 1, pp. 269-276 (2004)