Abstract
The fulfillment of Curie– Weiss laws for a ferrofluid is critically discussed. The results of investigations of the magnetic susceptibility temperature dependences of ferrofluid and dried powder of magnetic particles are presented. The effective field parameter is computed in approximation of the effective field theory. It is indicated that the value of the effective field parameter is not constant and depends on the concentration of magnetic nanoparticles and the temperature of the sample. It was found that Curie-Weiss law with λ = 4π / 3 is satisfied for ferrofluid with a limited range of volume concentration of magnetic particles.
Highlights
A magnetic colloid, known as a ferrofluid (FF), is a colloidal suspension of single-domain magnetic particles, with typical dimensions of about 10 nm, dispersed in a liquid carrier [1,2,3]
We focus on what effects on the magnetic susceptibility has these properties of magnetic particles and carrier
We conclude that the temperature dependence of the magnetic susceptibility of such systems corresponds to the behaviour similars to the Curie–Weiss law at temperature range of 310–380 K
Summary
A magnetic colloid, known as a ferrofluid (FF), is a colloidal suspension of single-domain magnetic particles, with typical dimensions of about 10 nm, dispersed in a liquid carrier [1,2,3]. At finite concentration, taking into account the magnetic interparticle interaction under the applied field, it is possible to use a mean field approximation, an effective field model, and the magnetization is described as. The temperature studies of the magnetic susceptibility of various samples of ferrofluid at a fixed concentration of the particles showed that at sufficiently high temperatures the CurieWeis law could describe dependence of the susceptibility on temperature. This result indicates the possibility of using the effective field model in this temperature interval. We focus on what effects on the magnetic susceptibility has these properties of magnetic particles and carrier
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
