Magnetoelectric behavior of carbonyl iron mixed Mn oxide-coated ferrite nanoparticles

Faris B Abdul Ahad, Shang Fan Lee, Dung Shing Hung, Yeong Der Yao, Ruey Bin Yang, Chung Kwei Lin, Chien Yie Tsay

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The dielectric and magnetic properties of manganese oxide-coated Fe 3 O3 nanoparticles (NPs) were measured by the cavity perturbation method at x-band microwave frequencies ranging from 7-12.5 GHz with controlled external magnetic field up to 2.2 kOe at room temperature. Different ratios (5%, 10%, and 20% by weight) of coated NPs were prepared by sol-gel method then mixed with carbonyl iron powder in epoxy matrix. The saturation magnetization is inversely proportional to the NPs ratio in the mixture between 150 and 180 emu/g. The real part of the permittivity decreased with increasing NPs concentration, but the permittivity change by magnetic field increased. The tunability behavior is explained by insulator-ferromagnetic interface magnetoelectricity and the large surface volume ratio for the NPs.

Original languageEnglish
Article number09D904
JournalJournal of Applied Physics
Volume107
Issue number9
DOIs
Publication statusPublished - May 1 2010
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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