Iranian Journal of Physics Research

Investigation of doping and particle size effect on structural, magnetic and magnetoresistance properties of manganites

Authors

M. Hakimi
P Kameli
H. Salamati
M. Eshraghi
A. Aezami
Abstract
 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.

Keywords

magnetoresistance
manganites
LSMO
Iranian Journal of Physics Research
Volume 8, Issue 2
Spring 2008
Pages 79-98

Home

Guide for Authors

Submit Manuscript

Reviewers

Contact Us

تحت نظارت وف بومی