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- W1623667167 abstract "Magnetotransport properties of CrxFe3−xO4 (x≤0.95) thin films prepared using a sol-gel method were measured and analyzed in comparison with their magnetic properties. The samples were polycrystalline and exhibited a slight decrease in lattice constant as the Cr composition (x) increases. The observed decreasing trend in the saturation magnetization (Ms) of CrxFe3−xO4 with increasing x can be explained in terms of the decrease in net spin magnetic moment due to the substitution of Cr3+(3 μB) for octahedral Fe3+(5 μB). The magnetoresistance (MR) of the CrxFe3−xO4 films was found to increase in a linear manner with increasing external field (H≤5 kOe) while the observed magnetization of the samples started to saturate near H=2 kOe. For a given H, MR decreases with increasing x. The observed increase in MR with increasing H in CrxFe3−xO4 is mainly attributable to the reduction in tunneling resistance of spin-polarized carriers through grain boundaries (GBs). Transition layers of magnetization formed around magnetic defects in the GBs are likely to be connected to the spin-dependent tunneling. The decrease in MR with increasing x is attributable to the disorder-induced scattering." @default.
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- W1623667167 date "2008-10-15" @default.
- W1623667167 modified "2023-10-05" @default.
- W1623667167 title "Magnetotransport properties of inverse-spinel CrxFe3−xO4 thin films" @default.
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- W1623667167 doi "https://doi.org/10.1063/1.3000625" @default.
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