Abnormal magnetic transport in Co/Mn/Co sandwiches

A series of Co/Mn/Co sandwiches was prepared on GaAs(001) surfaces at room temperature via a molecular beam epitaxy (MBE) technique. Reflection high-energy electron diffraction (RHEED) and x-ray-diffraction (XRD) analysis indicated a polycrystalline structure. By standard magnetoresistance measureme...

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Bibliographic Details
Published in:Journal of applied physics 1997-04, Vol.81 (8), p.5203-5205
Main Authors: Zhao, H. W., Chen, Y., Dong, G. S., Lu, M., Jin, X. F., Wang, Y. J., Zhai, H. R., Yang, D., Naik, R., Dunifer, G. L., Auner, G. W.
Format: Article
Language:English
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Summary:A series of Co/Mn/Co sandwiches was prepared on GaAs(001) surfaces at room temperature via a molecular beam epitaxy (MBE) technique. Reflection high-energy electron diffraction (RHEED) and x-ray-diffraction (XRD) analysis indicated a polycrystalline structure. By standard magnetoresistance measurements, it was found that with a Mn spacer thickness of 8 Å, a seldom-seen positive magnetoresistance (PMR) as high as 16% was exhibited at room temperature. The measurement under different geometries of H and I indicated that it was not an anisotropic magnetoresistance (AMR) effect. The MR–H curve displayed no hysteresis in contrast to the magnetometry measurement. An interface effect is proposed as a possible origin of this phenomenon.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.364466