title: Magnetism and magnetotransport in sonochemically-prepared amorphous Co(100-x)Pt(x) nanoalloys.
abstract: Amorphous nanoalloys of Co(100-x)Pt(x) (0 < or = x < or = 50) prepared sonochemically exhibit a negative magnetotransport effect, showing a maximum for platinum volume fraction of 10%. The oscillatory peak maxima observed in x = 30 composition for residual resistivity, rho0 and Tmin corresponds to the peak minima for the negative MR% in the range of compositions studied. We observe that in weakly exchange coupled amorphous alloys, the local magnetic order at Tmin and the disorder effects observed from rho0 become crucial.
authors.affiliation: Materials Chemistry Laboratory, Department of Chemistry, Indian Institute of Technology, Kanpur, UP-208016, India.
authors.forename: Manju Lata
authors.initials: ML
authors.lastname: Rao
authors.forename: S Sundar
authors.initials: SS
authors.lastname: Manoharan
authors.forename: D
authors.initials: D
authors.lastname: Elefant
authors.forename: C M
authors.initials: CM
authors.lastname: Schneider
mesh_terms: D000497:Alloys; D002244:Carbon / Q000737:chemistry*; D004560:Electricity; D007700:Kinetics; D008280:Magnetics; D046529:Microscopy, Electron, Transmission; D036103:Nanotechnology / Q000379:methods*; D009991:Oscillometry; D010984:Platinum / Q000737:chemistry*; D013016:Sound; D013696:Temperature; D013997:Time Factors; D014961:X-Ray Diffraction; D014965:X-Rays
chemical_list: D000497:Alloys; D010984:Platinum; D002244:Carbon