Magnetic and microstructural properties of the assembly of Ni(C) nanoparticles |
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| Institution: | 1. Department of Mechanical Engineering, University of la Rioja, Edificio Departamental — C/Luis de Ulloa, 20, 26004 Logroño, La Rioja, Spain;2. Department of Electrical Engineering, University of la Rioja, Edificio Departamental — C/Luis de Ulloa, 20, 26004 Logroño, La Rioja, Spain |
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| Abstract: | Superparamagnetic properties of the assembly of carbon encapsulated Ni nanoparticles (Ni(C) nanoparticles) with an average particle size of 10.5 nm are studied, the blocking temperature (TB) is determined to around 115 K at l000 Gs applied field. Above TB, the magnetization M(H,T) can be described by the standard Langevin function L using the relation M/MS(T=0)=coth(μH/kT)−kT/μH. Magnetization measurements suggest, this assembly of carbon encapsulated Ni nanoparticles have been exhibited typical single-domain, field-dependent superparamagnetic relaxation properties. |
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