Magnetic Properties of Manganese-Zinc Soft Ferrite Ceramic for High Frequency Applications

Lucian-Gabriel Petrescu , Maria-Cătălina Petrescu , Valentin Ionit , Emil Cazacu , Catalin Constantinescu (1)

1 IRCER-AXE2 - IRCER - Axe 2 : procédés plasmas et lasers

A soft magnetic MnZn-type ferrite is considered for high frequency applications. First, the morphological, structural, and chemical composition of the material are presented and discussed. Subsequently, by using a vibrating sample magnetometer (VSM), the hysteresis loops are recorded. The open magnetic circuit measurements are corrected by employing demagnetization factors, and by taking into consideration the local magnetic susceptibility. Finally, the hysteresis losses are estimated by the Steinmetz approach, and the results are compared with available commercial information provided by selected MnZn ferrite manufacturers. Such materials are representative in planar inductor and transformer cores due to their typically low losses at high frequency, i.e., up to several MHz, in low-to-medium power applications and providing high efficiency of up to 97%-99%.

Mots clés: ferrite; soft magnetic; ceramic; transformer core; demagnetization factor; losses

Domaines: Matière Condensée [cond-mat]; Science des matériaux [cond-mat.mtrl-sci]

Lucian-Gabriel Petrescu, Maria-Cătălina Petrescu, Valentin Ionit, Emil Cazacu, Catalin Constantinescu. Magnetic Properties of Manganese-Zinc Soft Ferrite Ceramic for High Frequency Applications. Materials, 2019, ⟨10.3390/ma12193173⟩. ⟨hal-02375043⟩