Synthesis, structural and electrical properties of triethylene glycol (TREG) stabilized Mn0.2Co0.8Fe2O4 NPs
2012 (English)In: Materials research bulletin, ISSN 0025-5408, E-ISSN 1873-4227, Vol. 47, no 3, 537-543 p.Article in journal (Refereed) Published
Triethylene glycol (TREG) stabilized Mn0.2Co0.8Fe2O4 NPs was synthesized by a glycothermal reaction. XRD analysis identified the product as Mn0.2Co0.8Fe2O4 with a high phase purity. Nano-sized particles with an average size of about 6-8 nm were obtained with nearly single crystalline nature with TEM analysis. Superparamagnetic-like behavior of TREG stabilized Mn0.2Co0.8Fe2O4 NPs was observed by VSM. The binding between TREG and Mn0.2Co0.8Fe2O4 NPs was investigated with FT-IR and found to be via O on the TREG and NP surface. TG analysis indicated that the Mn0.2Co0.8Fe2O4 NP content was about 40%, with a TREG-shell content to be around 60%. Overall conductivity of the nanocomposite is in the range of 10(-10) to 10(-7) S cm(-1) with a strong dependence on temperature and frequency, indicating ionic conductivity. The nanocomposite exhibited lower epsilon' and epsilon '' compared to TREG stabilized Mn0.2Co0.8Fe2O4 NPs due to the doping of co-doping of manganese and cobalt.
Place, publisher, year, edition, pages
2012. Vol. 47, no 3, 537-543 p.
Magnetic materials, Chemical synthesis, Impedance spectroscopy, Dielectric properties, Magnetic properties
IdentifiersURN: urn:nbn:se:kth:diva-93936DOI: 10.1016/j.materresbull.2011.12.050ISI: 000301994100006ScopusID: 2-s2.0-84857502392OAI: oai:DiVA.org:kth-93936DiVA: diva2:524828
QC 201205042012-05-042012-05-032012-05-04Bibliographically approved