Investigation of the thermomagnetoelectric phenomena in a magnetic fluid

G. Kroņkalns

Institute of Physics, University of Latvia, 32 Miera, Salaspils-1, LV-2169, Latvia

Abstract
Using a digital storage oscilloscope PCS 500, a computer and its monitor, a dielectric permittivity ε₀ and an electric conductivity σ₀ are measured from the volume concentration ϕ of magnetic nanoparticles of hydrocarbon magnetic fluid (MF) samples. The MF samples contain chemically coprecipated magnetite \Fe ₃Ø ₄ and complex \Mn _0.5\Zn _0.5\Fe ₂Ø ₄ nanoparticles stabilized by oleic acid coating and dispersed in kerosene and tetradecane, respectively. The DC current electric conductivity σ₀ = σ₀ (T, \vcH, \vcE) and the dielectric permittivity ε₀ = ε₀ (T, \vcH, \vcE) are measured by measuring a relaxation time τ of the capacitor discharge. The magnetoelectric and electromagnetic phenomena are observed in \Mn _0.5\Zn _0.5\Fe ₂Ø ₃ nanoparticles. Figs 8, Refs 26.