期刊
JOURNAL OF APPLIED PHYSICS
卷 108, 期 4, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3478750
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资金
- CSIR, India
- DST-RFBR
- DST Fast Track, India
Tunneling magnetoresistance in polycrystalline double perovskite Sr2FeMoO6 exhibits many unusual features, which can be efficiently probed by manipulating the tunnel barriers/grain surfaces. Accordingly, many experimental reports appeared on nanosized particles of Sr2FeMoO6 with largely enhanced grain boundary contributions. However, for the first time we report the existence of a spin-glasslike component, along with conventional ferromagnetism, in well-characterized Sr2FeMoO6 nanoparticles, which has been critically confirmed by the perceptible exchange bias effect, observed in these nanoparticles. Our results suggest that the spin-glass component is likely to reside on the surface of each particle, which probably provides useful clues about the unusual tunneling magnetoresistance responses, always exhibited by nanocrystalline Sr2FeMoO6. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3478750]
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