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Magnetoresistance investigation of Sr2FeMoO6 by Fe modification at grain boundaries.
- Source :
-
Materials Research Bulletin . Jun2017, Vol. 90, p145-150. 6p. - Publication Year :
- 2017
-
Abstract
- Series of Sr 2 Fe (1+ x ) MoO 6 ( x = 0, 0.03, 0.05, 0.08) ceramics have been synthesized by introducing metal Fe at grain boundaries. The increasing of Fe segregation changes the Fe/Mo anti-site defect (ASD) and decreases grain boundary (GB) strength significantly. Fe/Mo ASD contributes to low-field magnetoresistance (LFMR) negatively, but GB positively. When x ≤ 0.03, the ASD content of the maternal Sr 2 FeMoO 6 (10%, x = 0) decreases to 8% ( x = 0.03), which compensates the lowering of GB strength partially, and hence a slightly improved LFMR behavior is observed. However, when x ≥ 0.03 ( x = 0.05, 0.08), Fe impurity bring about heavy ASD content and decreasing GB strength, so the LFMR property is suppressed greatly. The magnetoresistance behavior has been explored by a fitting model further. We believe that, our work may provide a facile and effective strategy for adjusting magnetoresistance response by tuning B-site ordering and GB strength of the double perovskite. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00255408
- Volume :
- 90
- Database :
- Academic Search Index
- Journal :
- Materials Research Bulletin
- Publication Type :
- Academic Journal
- Accession number :
- 122648506
- Full Text :
- https://doi.org/10.1016/j.materresbull.2017.02.029