NDLI: Structural and magnetoresistive properties of mechanically alloyed Fe-Co-Ag

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Structural and magnetoresistive properties of mechanically alloyed Fe-Co-Ag

Content Provider	Scilit
Author	Cohen, Neil S. Pankhurst, Quentin A. Barquín, Luis Fernández
Copyright Year	1999
Description	Journal: Journal of Physics: Condensed Matter The structural, magnetic and magnetoresistive properties of a wide range of mechanically alloyed Fe-Co-Ag granular materials were investigated by means of x-ray diffraction, Mössbauer spectroscopy, differential scanning calorimetry, DC magnetometry and magneto-resistance measurements. Binary Fe-Co alloys, milled using Syalon containers, showed a mixed fcc-bcc structure for Fe compositions between 20 and 25 at.%. The ternary alloys were found to comprise dispersions of Fe-Co grains in an fcc silver matrix, with the structure and magnetic properties of the Fe-Co grains mirroring those of the corresponding binary Fe-Co alloys. For materials with Fe:Co ratios in the region of the mixed fcc-bcc phases, additional components were noted in their Mössbauer spectra (a secondary sextet and a paramagnetic doublet, accounting for up to 63% of the spectral area), indicating the intermixing of a significant number of small Fe-Co clusters or fine grains into the Ag matrix. Alloys in this region were also found to have the largest magnetoresistive responses, with the maximum being a 5.8% effect in $(Fe_{0.15}Co_{0.85})_{30}Ag_{70}$, as measured at 10 K in a field of 3 T. This indicates the dominant significance of fine grain intermixing in these alloys.
Related Links	http://iopscience.iop.org/article/10.1088/0953-8984/11/45/308/pdf
Ending Page	8853
Page Count	15
Starting Page	8839
ISSN	09538984
e-ISSN	1361648X
DOI	10.1088/0953-8984/11/45/308
Journal	Journal of Physics: Condensed Matter
Issue Number	45
Volume Number	11
Language	English
Publisher	IOP Publishing
Publisher Date	1999-10-27
Access Restriction	Open
Subject Keyword	Journal: Journal of Physics: Condensed Matter Metallurgy and Metallurgical Engineering Condensed Matter Physics Properties of Mechanically Alloyed Fe Magnetoresistive Properties Co Ag Fe Co Alloys Magnetic Properties
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Materials Science

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