Kumar, Nitu and Khurana, Geetika and Gaur, Anurag and Kotnala, R. K. (2013) Room temperature low field magnetoresistance in Sr2FeMoO6/ZnxFe1-xFe2O4 composites. Journal of Applied Physics , 114 (5). 053902-1-053902-5. ISSN 0021-8979

PDF - Published Version Restricted to Registered users only Download (1343Kb) | Request a copy

Abstract

Double perovskite Sr2FeMoO6/ZnxFe1-xFe2O4 (SFMO/ZFO) composite systems with varying zinc content in nanosized zinc ferrite were synthesized. Composites have been prepared by two phase sintering process of limited intermixing of the SFMO calcined powder and ZFO nanoparticles. The structural analysis confirms the coexistence of both the phases in the composites and revealed that the agglomerated ZFO nanoparticles segregated at the grain boundaries. It was found that the inclusion of low ZFO content (2wt. %) increases the resistivity, magnetization, and low field magnetoresistance (LFMR), whereas it further decreases with increasing ZFO content. A large room-temperature tunnelling magnetoresistance (Delta rho/rho(0)) ratio 4.83% and 6.90% was observed for pristine SFMO and SFMO/ZFO (x = 0.7) composite samples respectively at low magnetic field of 2 kOe, which is 1.42 times larger than pure SFMO sample. The enhanced LFMR is highly desirable for room temperature magneto resistive applications.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s American Institute of Physics.
Subjects:	Applied Physics/Condensed Matter
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	03 Jul 2020 11:24
Last Modified:	03 Jul 2020 11:24
URI:	http://npl.csircentral.net/id/eprint/3068

Actions (login required)

View Item