Please use this identifier to cite or link to this item:
Title: Effect of Fe doping on the magnetotransport properties in Nd0.67Sr0.33MnO3 manganese oxides
Authors: Chang, Y.L.
Huang, Q.
Ong, C.K. 
Issue Date: 15-Jan-2002
Source: Chang, Y.L., Huang, Q., Ong, C.K. (2002-01-15). Effect of Fe doping on the magnetotransport properties in Nd0.67Sr0.33MnO3 manganese oxides. Journal of Applied Physics 91 (2) : 789-793. ScholarBank@NUS Repository.
Abstract: We have performed magnetic and transport measurements on a series of Nd0.67Sr0.33Mn1-xFexO3 polycrystalline compounds with x=0.0, 0.05, 0.10, and 0.15. For the Fe-undoped Nd0.67Sr0.33MnO3 (NSMO) materials, a magnetoresistance (MR) as high as ∼33% was observed at the metal-insulator transition temperature, Tp=273K, in a magnetic field of 10 kOe. Fe substitution in Mn sites leads to a reduction in Tp and an increase in the overall MR. A 10% Fe contribution increases the MR up to about 65% and lowers Tp to 88 K. The calculated magnetic moment at 5 K and an applied field at 9 T for the parent NSMO is 4.21 μB and decreases continuously with an increasing amount of iron added. It was found that with the same amount of Fe doping, the Curie temperature, TC, decreases much faster in the Nd-based system than in the corresponding La-based system. The enhanced colossal magnetoresistance and the suppression of ferromagnetism observed in this compound can be interpreted as due to the weakening of the double exchange mechanism by Fe3+ ions, which causes the localization of the hopping electrons. © 2002 American Institute of Physics.
Source Title: Journal of Applied Physics
ISSN: 00218979
DOI: 10.1063/1.1421044
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Mar 6, 2018


checked on Jan 24, 2018

Page view(s)

checked on Mar 11, 2018

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.