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Magnetoresistance of Cu x Co 1‐x Fe 2 O 4 Ferrites
Author(s) -
Ghani Ahmed A.,
Eatah Ali I.,
ElFaramawy ElMozamel
Publication year - 1988
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1988.tb05815.x
Subject(s) - magnetoresistance , cobalt , electron , ferrite (magnet) , scattering , materials science , analytical chemistry (journal) , condensed matter physics , ferromagnetism , magnetic field , nuclear magnetic resonance , chemistry , metallurgy , physics , optics , chromatography , quantum mechanics , composite material
Magnetoresistance measurements (Δ/R) were carried out on Cu x Co 1‐ x Fe 2 O 4 samples with x =1, 0.75, 0.50, 0.25 and cobalt ferrite in the range of magnetic intensity (H) from 1.0 to 4.5 kG. Linear plots were obtained between log (Δ/R) and log H for all compositions except that of cobalt ferrite. The values of n at x =0.5 do not agree with the results of some authors. The discrepancy may be attributed to the value of magnetic field intensity at which such measurements were carried out. The similarity of features of n and μ D with composition leads us to believe that the magnetoresistance may arise from the scattering of conduction electrons by localized electrons involving the s‐d exchange interaction.