XAS and XMCD studies of amorphous FeCo-based ribbons

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• 作者：Sanjeev Gautam^a ; ^b ; ^{sgautam71@kist.re.kr"" rel=""nofollow} ; Shanshank N. Kane^c ; B.– ; G. Park^b ; J.– ; Y. Kim^b ; L.K. Varga^d ; J.– ; H. Song^a ; Keun Hwa Chae^a ; ^{khchae@kist.re.kr"" rel=""nofollow}
• 关键词：FeCo-based alloy ; Amorphous ribbons ; X-ray absorption spectroscopy ; X-ray magnetic circular dichroism
• 刊名：Journal of Non-Crystalline Solids
• 出版年：2011
• 出版时间：June 2011
• 年：2011
• 卷：357
• 期：11-13
• 页码：2228-2231
• 全文大小：339 K

文摘

This paper reports x-ray absorption spectroscopy (XAS) and x-ray magnetic circular dichroism (XMCD) studies at Fe L_3,2 and Co L_3,2-edges to investigate the electronic structure of (Fe_100 − xCo_x)₇₈Si₉Nb₃B₉Cu₁ (0 < x < 95) alloys. The influence of controlled Co addition on electronic structural and magnetic properties of (Fe_100 − xCo_x)₇₈Si₉Nb₃B₉Cu₁ (x = 0, 20, 40, and 60) alloys has been investigated and it has been observed that Co exists as Co²⁺/Co³⁺, while Fe exists as a mixture of Fe⁰ (metallic) and Fe²⁺. The XMCD studies confirm these results and reveal that Co-ions are responsible for the room temperature ferromagnetism (RTFM) in the system, while at Fe L_3,2-edge it shows a diamagnetic behavior.