Alternate current magnetic property characterization of nonstoichiometric zinc ferrite nanocrystals for inductor fabrication via a solution based process

Yun, Hongseok; Kim, Jungkwun; Paik, Taejong; Meng, Lingyao; Jo, Pil Sung; Kikkawa, James M.; Kagan, Cherie R.; Allen, Mark G.; Murray, Christopher B.

doi:10.1063/1.4942865

Alternate current magnetic property characterization of nonstoichiometric zinc ferrite nanocrystals for inductor fabrication via a solution based process

Journal Article · Thu Mar 17 00:00:00 EDT 2016 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4942865· OSTI ID:1421090

; Kim, Jungkwun; Paik, Taejong; Meng, Lingyao; Jo, Pil Sung; Kikkawa, James M.; Kagan, Cherie R.; Allen, Mark G.; Murray, Christopher B.

We investigate the ac magnetic behavior of solution processable, non-stoichiometric zinc ferrite nanocrystals with a series of sizes and zinc concentrations. Nearly monodisperse ZnxFe3−xO4 nanocrystals (x = 0–0.25) with an average size ranging from 7.4 nm to 13.8 nm are synthesized by using a solvothermal method. All the nanocrystals are in a superparamagnetic state at 300 K, which is confirmed by Superconductive Quantum Interference Device magnetometry. Due to the doping of non-magnetic Zn2+ into A site of ferrite, the saturation magnetization of nanocrystals increases as the size and Zn concentration increases. The ac magnetic permeability measurements at radio frequencies reveal that the real part of the magnetic permeability of similarly sized ferrite nanocrystals can be enhanced by almost twofold as the Zn2+ doping level increases from 0 to 0.25. The integration of 12.3 nm Zn0.25Fe2.75O4 nanocrystals into a toroidal inductor and a solenoid inductor prepared via a simple solution cast process yields a higher quality factors than air core inductors with the same geometries up to 5 MHz and 9 MHz, respectively, which is in the regime of the switching frequencies for the advanced integrated power converters.

View Accepted Manuscript (Publisher)

Sponsoring Organization:: USDOE Advanced Research Projects Agency - Energy (ARPA-E)

Grant/Contract Number:: AR0000123

OSTI ID:: 1421090

Alternate ID(s):: OSTI ID: 22596902

Journal Information:: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 11 Vol. 119; ISSN 0021-8979

Publisher:: American Institute of PhysicsCopyright Statement

Country of Publication:: United States

Language:: English

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