TITLE

Enhanced intergrain magnetoresistance in bulk Sr[sub 2]FeMoO[sub 6] through controlled processing

AUTHOR(S)
Sharma, A.; Berenov, A.; Rager, J.; Branford, W.; Bugoslavsky, Y.; Cohen, L. F.; MacManus-Driscoll, J. L.
PUB. DATE
September 2003
SOURCE
Applied Physics Letters;9/22/2003, Vol. 83 Issue 12, p2384
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Enhanced low field magnetoresistance (LFMR) values have been obtained in bulk Sr[sub 2]FeMoO[sub 6] through controlled processing. MR values, R(H)/R(0) of ∼60% [(R(H)-R(H=0)/R(H=0)=40%] were achieved at 50 K, in 1 T, and R(H)/R(0)∼8% [(R(H)-R(H=0)/R(H=0)=92%] at 290 K, in 1 T. For a ∼1 μm starting particle size, the optimum sintering temperature was 1300 °C, 100 °C higher than normally used. The optimum sintering time in Ar/H[sub 2] was only 5 h, much shorter than normally used. The magnitude of the LFMR appears to depend strongly on grain boundary oxygen content, controlled through optimization of sintering temperature and time. © 2003 American Institute of Physics.
ACCESSION #
10848405

 

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