Disordered and Frustrated Magnetization in Coated MnFe2O4 Nanoparticles Prepared by Microwave Plasma Synthesis

Kashif Nadeem*, M. Kamran, Heinz Krenn, D.V. Szabo, Ulrich Brossmann, Roland Würschum

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

Abstract

Disordered and frustrated magnetization of different surface coated (Cr2O3, Co3O4, ZrO2, and SiO2) MnFe2O4 nanoparticles have been studied using SQUID-magnetometry. Magnetic measurements, such as ZFC/FC and ac-susceptibility evidence surface spin-glass behavior. ZFC/FC curves were also compared with numerical simulation to get information about effective anisotropy constants. Frequency dependent ac susceptibility results were analyzed by using Arrhenius, Vogel Fulcher and dynamic scaling laws to further confirm the spin-glass behavior. It is observed that the strength of surface spins disorder and frustration strongly depends upon the type of the coating material. All these analyses signify that disordered and frustrated surface magnetization in MnFe2O4 nanoparticles greatly depend on the type of the surface coating materials and are useful for controlling the nanoparticle’s magnetism for different practical applications.
Original languageEnglish
Pages (from-to)127-133
JournalSolid State Phenomena
Volume289
DOIs
Publication statusPublished - 2019
Event21st International Conference on Solid Compounds of Transition Elements: SCTE 2018 - Wien, Austria
Duration: 25 Mar 201829 Mar 2018

Fields of Expertise

  • Advanced Materials Science

Cite this