Reduced magnetization and magneto-resistance in Sr2Fe1–xCrxMoO6 with increasing Cr substitution

We report the results from magnetization and magneto-resistance measurements on polycrystalline Sr2Fe1–xCrxMoO6. A decrease in the saturation moment per f.u. is observed, which we attribute to site dilution for x⩽0.4 and anti-site disorder for x⩾0.6 along with a reduced Cr3+ saturation moment when c...

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Bibliographic Details
Published in:Current applied physics 2008, 8(3, 4), , pp.273-275
Main Authors: Hemery, E.K., Williams, G.V.M., Graham, J.D., Trodahl, H.J.
Format: Article
Language:English
Subjects:
Chromium substitution
Double perovskite
Magneto-resistance
물리학
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Summary:We report the results from magnetization and magneto-resistance measurements on polycrystalline Sr2Fe1–xCrxMoO6. A decrease in the saturation moment per f.u. is observed, which we attribute to site dilution for x⩽0.4 and anti-site disorder for x⩾0.6 along with a reduced Cr3+ saturation moment when compared with Fe3+. The magneto-resistance also decreases with increasing Cr substitution. This may be due to increased disorder leading to an increase in spin-scattering near the spin-tunnelling grain boundaries for x⩽0.4. There is no evidence for spin-tunnelling for x⩾0.6 and the magneto-resistance can be attributed to a reduction in intra-grain spin-scattering with increasing magnetic field.
ISSN:1567-1739
1878-1675
DOI:10.1016/j.cap.2007.10.013