Magnetostriction of nanocrystalline (Fe,Co)-Si-B-P-Cu alloys

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• 作者：Markus Kuhnt^a ; ^{m.kuhnt@materialium.tu-darmstadt.de} ; Mie Marsilius^b ; Thomas Strache^b ; Christian Polak^b ; Giselher Herzer^b
• 关键词：Nanocrystalline soft magnetic materials ; Nanocrystalline material ; Magnetostriction
• 刊名：Scripta Materialia
• 出版年：2017
• 出版时间：15 March 2017
• 年：2017
• 卷：130
• 期：Complete
• 页码：46-48
• 全文大小：736 K
• 卷排序：130

文摘

Amorphous ribbons of composition Fe85.2-xCoxSi0.5B9.5P4Cu0.8 (x = 0 at% and 4 at%) have been flash annealed for 10 s at temperatures between 350 °C and 540 °C. Above about 400 °C a nanocrystalline state of bcc Fe(Co) is formed with a crystalline fraction of 50–55% and grain sizes of about 16–18 nm. The optimum nanocrystalline state reveals a saturation polarization up to Js=1.82 T–1.83 T and a coercivity as low as 3–5 A m −1. The present paper complements the so far missing magnetostriction data for these alloys. Magnetostriction decreases from initially 40 ppm in the as cast amorphous state to about 14 ppm (x = 0 at%) and 19 ppm (x = 4 at%), respectively, after formation of the fully developed nanocrystalline state.