Ultra-low loss thin film magnetics for future power supplies

A fundamental roadblock in advancing the magnetic passive device technology for high frequencies is the availability of suitable magnetic material. Presently, ferrites are used as magnetic core material in these applications. Ferrite material has low loss performance at frequencies of 130 kHz and 100 mT of peak applied field, with a loss density of 300 kW/m3, additionally, low flux density of ferrites ha s restricted the magnetic components to larger footprint/volume. Tyndall National Institute have developed novel soft magnetic alloy compositions and rapid quenching processing technology for low – loss nano-crystalline films to address t he challenge to develop high flux density, low loss and lower footprint magnetic components working up to frequencies of 5 – 10 MHz.

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