Inverse magnetoresistance in (FeCoB)-(Al2O3) magnetic granular compositesстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The magnetoresistance, magnetization, and microstructure of granular composites with the general formula (Fe40Co40B20)(x)(Al2O3)(100-x) were studied for contents of the amorphous metallic component both above and below the percolation threshold (xapproximate to43). The low-temperature transverse magnetoresistance of the composites is negative at x=41 and practically zero for x=49. For metal contents below the percolation threshold (x=31), a noticeable (7-8%) positive magnetoresistance, reached in magnetic fields of about 17 kOe, was observed. Possible mechanisms of the generation of inverse (positive) magnetoresistance are discussed. (C) 2003 MAIK "Nauka/Interperiodica".