Structure analyses of Cu nanoclusters in the soft magnetic Fe85.2Si1B9P4Cu0.8 alloy by XAFS and fcc cluster model

16th International Conference on X-ray Absorption Fine Structure

Matsuura, M.^1 ; Nishijima, M.^1 ; Konno, K.^2 ; Ofuchi, H.^3 ; Takenaka, K.^1 ; Makino, A.^1

Research and Development Center for Ultra High Efficiency Nano-crystalline Soft Magnetic Material, Institute for Materials Research, Tohoku University, Sendai

980-8577, Japan^1

Sendai National College of Technology, Medeshima, Natori, Miyagi

981-1239, Japan^2

Industrial Application Division, Japan Synchrotron Radiation Research Institute (JASRI), Kouto, Sayo, Hyogo

679-5198, Japan^3

关键词: Amorphous matrices;    Coordination shells;    Cu nanoclusters;    Linear combinations;    Nanocrystallines;    Nearest neighbour;    Soft magnetic alloys;    Structure analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/712/1/012106/pdf
DOI  :  10.1088/1742-6596/712/1/012106

来源: IOP

【 摘 要 】

Size of the clusters and structure details of fcc Cu clusters in nanocrystalline soft magnetic alloy of Fe85-86Si1-2B8P4Cu1(NANOMET) are investigated. A linear combination fitting of XAFS data indicates that about 30% of Cu atoms are partitioned in the fcc clusters and the rest in the amorphous matrix. EXAFS of the fcc Cu nanocluster embedded in amorphous matrix is calculated on the basis of a simple fcc structure model using FEFF9. Surface effect of the nanoclusters is considered by counting a fraction of the nearest neighbour atoms in amorphous matrix. Good agreement with the experimental result is obtained for the fcc nanocluster with 9 coordination shells which consists of total 177 atoms within 1.5 nm in a diameter.