ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Polycrystal samples of La1-xSrxMnO3 (x=0.2, 0.3) have been synthesized using a sol-gelmethod. The effect of sintering process on the sample microstructure and Sr doping on themagnetoresistance for La1-xSrxMnO3 have been investigated. The results show that the increase ofsintering temperature and time can promote the crystallization of samples and reduce the content ofimpurity. The additive of Sr makes Mn ion in materials relatively compact, and this causes thedistorted deformation of the materials structure. The magnetoresistance (MR) changes with the Srdoping. When x=0.2, the maximum MR% of sample is about 43% and keep about 40% between10~150K. At room temperature, the MR% will decrease to about 6.5%. When x=0.3, the ordermagnetoresistance (OMR) effect occures above the room temperature
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.1826.pdf
Permalink