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- W2023748462 abstract "The (Co41Fe39B20)x(SiO2)100−x metal–insulator granular films (x=33, 43, 50, 72 and 100 at.%) with amorphous structure have been obtained by ion-beam sputtering technique. Resistivity and magnetoresistance have been studied in these materials. It has been observed that all the granular composites crystallize within the same temperature region 700–900 K independent of the concentration. Electrical conductance by hopping mechanism with a variable jump length is found to dominate in the (Co41Fe39B20)x(SiO2)100−x granular composites containing less than 72 at.% of the metal phase (33, 43 and 50 at.% Co41Fe39B20) at temperatures below 300 K. The negative giant magnetoresistance (GMR) was observed in the same granular composites. The maximum value of the GMR (3.4%) was found in the (Co41Fe39B20)50(SiO2)50 film which is close to the percolation threshold. The GMR is associated with the electron tunneling through the insulator barriers separating the ferromagnetic granules." @default.
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- W2023748462 date "2001-05-01" @default.
- W2023748462 modified "2023-10-18" @default.
- W2023748462 title "Electrical properties and giant magnetoresistance of the CoFeB–SiO2 amorphous granular composites" @default.
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- W2023748462 doi "https://doi.org/10.1016/s0921-5093(00)01606-3" @default.
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