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The chemical components and carefully selected thermal treatment of the material sample give the possibility to obtain a alloy with appropriate magnetic properties. The paper presents the results of the microstructure and magnetic properties of the Fe-81(PtRh)(5)Zr7Nb1Cu1B5 amorphous alloy in the state after solidification and after thermal treatment. Each sample was annealed at four steps, 15 min at every temperature, starting from 600 K up to +800 K depending on type of alloy. The alloys were investigated in as-quenched state, obtained in the form of thin ribbons with approximate dimensions: width 3 mm and thickness 20 mu m. The ribbons were obtained from high purity elements by melting with the use of arc. The production process was carried out in a protective atmosphere of an inert gas (Ar). Structure and microstructure were investigated using the Mossbauer spectroscopy and X-ray diffractometry. The Mossbauer spectra were recorded using a POLON Mossbauer spectrometer, equipped with a Co-57 (Rh) source with 50 mCi activity, at room temperature. The Mossbauer transmission spectra were analyzed using the "NORMOS" software. X-ray diffraction of the investigated strips was carried out using a Brucker Advance D8 diffractometer. From X-ray and the Mossbauer spectroscopy investigations, it has been stated that the as-quenched samples were fully amorphous.

acta physica polonica. a

The Microstructural Changes due to the Heating Treatment of Magnetic Amorphous Fe81(PtRh)5Zr7Nb1Cu1B5 Alloy