Characteristics of magnetism in nanoporous carbon with palladium clusters
2011 (English)In: Physics of the solid state, ISSN 1063-7834, E-ISSN 1090-6460, Vol. 53, no 5, 1017-1024 p.Article in journal (Refereed) Published
The magnetic properties of samples of nanoporous carbon with palladium clusters prepared from polycrystalline SiC have been studied over a wide range of temperatures. The specific magnetic moment rapidly decreases with increasing temperature. The obtained experimental magnetization curves have a nonlinear character but do not reach saturation even in a field of 10 kOe. Being constructed as functions of H/T, they lie on a universal curve, which suggests superparamagnetism of the system. The experimental curves have a hysteresis. The coercive force, first, decreases with increasing temperature and, then (in the range of 5–20 K), increases, thus forming a notch singularity. On the contrary, the residual magnetization rapidly decreases with increasing temperature. A conclusion on the prevailing contribution of superparamagnetic clusters to the magnetic subsystem is made.
Place, publisher, year, edition, pages
2011. Vol. 53, no 5, 1017-1024 p.
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:umu:diva-39643DOI: 10.1134/S1063783411050076OAI: oai:DiVA.org:umu-39643DiVA: diva2:394594