Loss characterization of Mo-doped FeNi flake for DC-to-DC converter and MHz frequency applications

Journal Article · Sun Apr 01 00:00:00 EDT 2012 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3677310· OSTI ID:1211303

Zhou, Y; Kou, XM; Mu, MK; McLaughlin, BM; Chen, X; Parsons, PE; Zhu, H; Ji, A; Lee, FC; Xiao, JQ

Magnetic core materials with low loss, high magnetic induction, large permeability, and high working frequencies above 1 MHz are in high demand in the next generation of miniaturized power electronic devices. Magnetic flake based composite materials have been developed to take advantage of high operating frequency ranges, low eddy current losses, high magnetic induction, and low cost fabrication methods. In this study, Mo-doped FeNi flakes with thicknesses of 0.4 +/- 0.2 mu m to 1.6 +/- 0.5 mu m have been successfully fabricated with high energy ball milling. The lateral size of the flake is around 100 mu m. After being hot-pressed with polymers, all of the samples show initial permeability higher than 40 in the frequency range up to 10 MHz and a loss tangent lower than 0.1. At high excitations, the composite materials show core losses 5 times lower than that of Fe flakes at 800 kHz. (C) 2012 American Institute of Physics. [doi:10.1063/1.3677310]

• Sponsoring Organization: USDOE Advanced Research Projects Agency - Energy (ARPA-E)
• DOE Contract Number: DE-AR0000106
• OSTI ID: 1211303
• Journal Information: Journal of Applied Physics, Vol. 111, Issue 7; ISSN 0021-8979
• Country of Publication: United States
• Language: English