Volume 8, Number 2 (6-2008)                   IJPR 2008, 8(2): 79-98 | Back to browse issues page


XML Persian Abstract Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

M. Hakimi, P. Kameli, H. Salamati, M. Eshraghi, A. Aezami. Investigation of doping and particle size effect on structural, magnetic and magnetoresistance properties of manganites. IJPR. 2008; 8 (2) :79-98
URL: http://ijpr.iut.ac.ir/article-1-271-en.html

Abstract:   (22152 Views)

 In this paper after introduction of manganites, we have studied the effect of particle size and doping on structural, magnetic and magnetoresistance of LSMO manganite samples. The magnetoresistance measurements show that, by decreasing the particle size LFMR increases. Also the results show that the LFMR increases at low doping levels and decreases at high doping levels. The spin dependent tunneling and scattering at the grain boundaries is the origin of increasing the LFMR at low doping levels. Also the substitution of impurity ions at Mn sites and subsequently weaking of double exchange is responsible for decreasing of LFMR at high doping level.

Full-Text [PDF 1901 kb]   (1976 Downloads)    
Type of Study: Research | Subject: general

Add your comments about this article : Your username or email:
Write the security code in the box

© 2015 All Rights Reserved | Iranian Journal of Physics Research

Designed & Developed by : Yektaweb