Magnetoimpedance studies in as quenched Fe73.5Si13.5B8CuV3−xAlNbx nanocrystalline ribbons

Autor:	Markandeyulu G, Venkatrao Chunchu
Rok vydání:	2013
Předmět:	Quenching Materials science Annealing (metallurgy) Amorphous matrix LCR meter Ribbon Metallurgy Analytical chemistry General Physics and Astronomy Cooling rates Crystallite Nanocrystalline material
Zdroj:	Journal of Applied Physics. 113:17A321
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.4795800
Popis:	Ribbons of Fe73.5Si13.5B8CuV3−xAlNbx (x = 0, 1.0, 1.5) alloys were prepared by melt-spun technique at the speed of 37 m/s. Crystalline phase derived from Fe3Si, in an amorphous matrix was observed in all the ribbons. As cast nanocrystalline ribbons were obtained by controlling cooling rates while quenching. The average crystallite sizes was calculated using the Scherrer's equation to be 44 nm, 39 nm, and 35 nm in x = 0, x = 1.0, and x = 1.5 ribbons, respectively. Magnetoimpedance measurements were carried out using an LCR meter. Among the investigated samples (x = 0, 1.0, 1.5), the largest magnetoimpedance of 61% was obtained for x = 1 ribbon annealed at 100 °C for 15 min, at 4 MHz.
Databáze:	OpenAIRE
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