Relationship between blocking temperature and strength of interparticle interaction in magnetic nanoparticle systems
Seehra, Mohindar S. · Pisane, Kelly L.
Original · EN
In magnetic nanoparticle systems, the variation of the blocking temperature TB with the measuring frequency fₘ is often used to determine the strength of the interparticle interactions (IPI) through a parameter Φ or the Vogel-Fulcher temperature Tₒ. Presence of IPI is inferred if Tₒ>0 and Φ=ΔTB/[TBΔlog₁₀fₘ]<0.13 where Δ signifies changes in TB and fₘ. Here it is shown that these two parameters are related by the Eq. Φ=Φₒ≈ 0.11 to 0.15 is a constant of the system depending on the magnitudes of measuring frequency and Φ=Φₒ[1-Tₒ/TB] where the attempt frequency fₒ of the Néel relaxation. Experimental verification of this relationship is also presented using data on a variety of nanoparticle systems.
English translation
This paper has no Arabic translation yet. Be the first: it takes a few seconds, and the result is stored for every future reader.