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- W2347135052 abstract "CoxZn1−xO (X = 0.20, 0.86, 0.92) films were synthesized using the radio frequency (RF) co-sputtering method. Though the same synthesis method was used, these samples exhibited different structures and magnetic properties. The Co0.20Zn0.80O film sample was crystalline, but its magnetic property was antiferromagnetism. Amorphous phase, room temperature ferromagnetism and anomalous Hall effect were shown in the sputtered and annealed Co0.86Zn0.14O and Co0.92Zn0.08O samples. Through x-ray photoelectron spectroscopy (XPS), the ferromagnetism of the high Co content amorphous films originates from metallic Co. The antiferromagnetism of Co0.20Zn0.80O crystalline film can be explained by an indirect-exchange interaction model. The electric conductivity is interpreted with the spin-dependent variable-range hopping model at low temperature. A tunneling magnetoresistance (TMR) ratio of 16.4% was observed at 77 K in Co(40 nm)/ZnO(4 nm)/Co0.92Zn0.08O(75 nm) magnetic tunnel junctions (MTJs). The MTJs can resist up to room temperature with the TMR ratio of 1.6% at 10 kOe." @default.
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- W2347135052 date "2015-12-14" @default.
- W2347135052 modified "2023-09-24" @default.
- W2347135052 title "Magnetic properties of the CoxZn1−xO (x = 0.20, 0.86, 0.92) films and its tunnel magnetoresistance" @default.
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- W2347135052 doi "https://doi.org/10.1088/2053-1591/2/12/126102" @default.
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