Temperature dependence of magnetic behaviour in very fine grained, spark plasma sintered NiCuZn Ferrites

Behzad Ahmadi (1) , Karim Zehani (1) , Martino Lobue (1, 2) , Vincent Loyau (1) , Frédéric Mazaleyrat (1, 2)

1 SATIE - Systèmes et Applications des Technologies de l'Information et de l'Energie
2 IDA - Institut d'Alembert

Recently, using spark plasma sintering technique, a family of very fine grained, fully dense NiCuZn ferrites have been produced which show constant permeability up to several 10 MHz. These Ferrites can be used for filtering purposes in high frequency applications where a wide frequency band is required. In this paper we study the magnetization processes taking place in these nano grained materials, in the frequency interval of 100kHz to 5MHz. Using a fluxmetric hysteresis graph, permeability, loss and BH loops are measured at different temperatures, from -5°C to 110°C. Results are compared to the behaviour of micrometric grain size Ferrites, which are commonly used for power electronic and high frequency applications.

Mots clés: Spark Plasma Sintered Ferrites; Magnetic loss; Rayleigh loops; Temperature dependence; Soft Magnetic Materials

Domaines: Instrumentations et Détecteurs [physics.ins-det]; Matériaux

Behzad Ahmadi, Karim Zehani, Martino Lobue, Vincent Loyau, Frédéric Mazaleyrat. Temperature dependence of magnetic behaviour in very fine grained, spark plasma sintered NiCuZn Ferrites. Journal of Applied Physics, 2012, 111 (7), pp.07A5 10. ⟨10.1063/1.3675983⟩. ⟨hal-00675776⟩