Influence of Ni addition on structure and magnetic properties of FeCo-based Finemet-type alloys

Autor:	Jing Yang, Hui-juan Kang, Rui-min Shi, Zhi Wang, Yun-yun Jia, Tong Lin
Rok vydání:	2011
Předmět:	Materials science Ferromagnetism Annealing (metallurgy) Metallurgy X-ray crystallography Analytical chemistry General Physics and Astronomy Curie temperature Melt spinning Microstructure Anisotropy Amorphous solid
Zdroj:	Journal of Applied Physics. 109:073917
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.3559267
Popis:	Structure and magnetic properties of melt-spun Nix(Fe0.5Co0.5)73.5−xSi13.5B9Nb3Cu alloys (x = 5,10,15,20,25,30) annealed at different temperatures were investigated. Microstructure has been analyzed from XRD patterns. Magnetic properties were mainly studied by the evolution of initial permeability from room temperature to 740 °C. All the 500 °C–annealed samples gave rise to an ultrafine structure composed of a residual amorphous matrix andα-FeCoNi(Si) crystals (tens of nanometers in size). It was found that Ni content had a significant impact on the Curie temperature of amorphous phaseTcam and initial permeabilityμi. There was a general reduced tendency ofTcam with Ni content increasing. For higher Ni content alloys (x≥25) annealed at 500 °C, theμi can be enhanced to the order of 104, which is much higher than that of Ni-free FeCo-based Finemet-type alloys. The reason for the enhancement inμi was systematically analyzed in terms of the effective anisotropy model.
Databáze:	OpenAIRE
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