title: Magnetic properties of monodisperse NiHx nanoparticles and comparison to those of monodisperse Ni nanoparticles.
abstract: We produced, for the first time, monodisperse NiH(x) nanoparticles with particle diameters of 7.0 nm and investigated their magnetic properties. We also produced monodisperse Ni nanoparticles with nearly the same particle diameters as those of NiH(x) nanoparticles as a comparison. The magnetic properties of NiH(x) nanoparticles were quite different from those of Ni nanoparticles. We observed two compositional phases in NiH(x) nanoparticles, similar to bulk material: one is the nearly pure Ni phase with the blocking temperature (T(B)) of 11 K and the other is the hydride phase. We observed T(B) of 40 K in Ni nanoparticles.
authors.affiliation: Department of Chemistry, College of Natural Sciences, Kyungpook National University, Taegu 702-701, South Korea.
authors.forename: Yoontae
authors.initials: Y
authors.lastname: Jeon
authors.forename: Gang Ho
authors.initials: GH
authors.lastname: Lee
authors.forename: Jeunghee
authors.initials: J
authors.lastname: Park
authors.forename: Bongsoo
authors.initials: B
authors.lastname: Kim
authors.forename: Yongmin
authors.initials: Y
authors.lastname: Chang
mesh_terms: D006859:Hydrogen / Q000737:chemistry*; D008280:Magnetics; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D009532:Nickel / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D009532:Nickel; D006859:Hydrogen