ScholarLens Back to search
2002•Unpublished venueRequires access

Magnetic properties and colossal magnetoresistance of La0.7Sr0.3MnO3 materials doped with Fe

B-H. Li, WX Xianyu, J Zhang, TJ Ma

Open publisher page 0 citations

Abstract

La0.7Sr0.3FexMn1-xO3 compounds (0.05 less than or equal to x less than or equal to 0.18) were prepared by the sol-gel technique. The effects of Fe doping on the magnetic properties, conductivity and magnetoresistance for La0.7Sr0.3MnO3 was investigated. Experimental results indicate that the Fe doping leads to a decrease in the ferromagnetic ordering temperature, an increase in the resistance and magnetoresistance effect. For samples of x = 0. 05 and x = 0. 08 two peaks are observed in their rho-T curve. Magnetic resistivity (MR) of La0.7Sr0.3Fe0.08Mn0.92O3 sample is capable of reaching 18% (8 x 10(5)A (.) m(-1), 293 K). At x greater than or equal to 0.1, metal-insulator (M-I) transition temperature ( T-p) is lower than ferromagnetic Curie temperature ( T-C) by about 50 similar to 80 K.

About this research paper

What this paper is about

La0.7Sr0.3FexMn1-xO3 compounds (0.05 less than or equal to x less than or equal to 0.18) were prepared by the sol-gel technique. The effects of Fe doping on the magnetic properties, conductivity and magnetoresistance for La0.7Sr0.3MnO3 was investigated. Experimental results indicate that the Fe doping leads to a decrease in the ferromagnetic ordering temperature, an increase in the resistance and magnetoresistance effect. For samples of x = 0. 05 and x = 0. 08 two peaks are observed in their rho-T curve. Magnetic resistivity (MR) of La0.7Sr0.3Fe0.08Mn0.92O3 sample is capable of reaching 18% (8 x 10(5)A (.) m(-1), 293 K). At x greater than or equal to 0.1, metal-insulator (M-I) transition temperature ( T-p) is lower than ferromagnetic Curie temperature ( T-C) by about 50 similar to 80 K.

Why it matters

A significance statement is not available in the OpenAlex record.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

La0.7Sr0.3FexMn1-xO3 compounds (0.05 less than or equal to x less than or equal to 0.18) were prepared by the sol-gel technique. The effects of Fe doping on the magnetic properties, conductivity and magnetoresistance for La0.7Sr0.3MnO3 was investigated. Experimental results indicate that the Fe doping leads to a decrease in the ferromagnetic ordering temperature, an increase in the resistance and magnetoresistance effect. For samples of x = 0. 05 and x = 0. 08 two peaks are observed in their rho-T curve. Magnetic resistivity (MR) of La0.7Sr0.3Fe0.08Mn0.92O3 sample is capable of reaching 18% (8 x 10(5)A (.) m(-1), 293 K). At x greater than or equal to 0.1, metal-insulator (M-I) transition temperature ( T-p) is lower than ferromagnetic Curie temperature ( T-C) by about 50 similar to 80 K.

Key concepts: Magnetoresistance, Colossal magnetoresistance, Curie temperature, Ferromagnetism, Condensed matter physics, Materials science, Electrical resistivity and conductivity, Doping

Related papers

Related paper 1Related paper 2Related paper 3
Back to paper searchBrowse research topicsOriginal source
Magnetic properties and colossal magnetoresistance of La0.7Sr0.3MnO3 materials doped with Fe — Research Paper | ScholarLens