Magnetism and magneto-transport studies in sonochemically prepared amorphous Co100−xPtx nano alloys
2004
Abstract Bulk amorphous Co (100− x ) Pt x (0≤ x ≤50) nano-alloys have been synthesized using high frequency ultrasound, displaying single domain (4–5 nm) behavior wherein weakly exchange-coupled particles lead to a field-dependent resistivity behavior. Magneto-resistivity is correlated to the order–disorder parameter in these powder compacts. The plot of Δ ρ / ρ 0 as a function of reduced magnetization indicates that all the systems are weakly exchange coupled.
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