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    Ultra-fast annealing manipulated spinodal nano-decomposition in Mn-implanted Ge

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    Liu+et+al_2018_Nanotechnology_10.1088_1361-6528_aaefb1.pdf
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    Type
    Article
    Authors
    Liu, Chaoming cc
    Hübner, René
    Xie, Yufang
    Wang, Mao
    Xu, C
    Jiang, Zenan
    Yuan, Ye cc
    Li, Xingji
    Yang, Jianqun
    Li, Ling-wei
    Weschke, Eugen
    Prucnal, Slawomir cc
    Helm, Manfred
    Zhou, Shengqiang
    KAUST Department
    King Abdullah University of Science and Technology, 23955, Thuwal, Saudi Arabia
    Date
    2018-11-30
    Online Publication Date
    2018-11-30
    Print Publication Date
    2019-02-01
    Permanent link to this record
    http://hdl.handle.net/10754/629935
    
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    Abstract
    In the present work, millisecond-range flash lamp annealing is used to recrystallize Mn-implanted Ge. Through systematic investigations of structural and magnetic properties, we find that the flash lamp annealing produces a phase mixture consisting of spinodally decomposed Mn-rich ferromagnetic clusters within a paramagnetic-like matrix with randomly distributed Mn atoms. Increasing the annealing energy density from 46, via 50, to 56 J/cm2 causes the segregation of Mn atoms into clusters, as proven by transmission electron microscopy analysis and quantitatively confirmed by magnetization measurements. According to X-ray absorption spectroscopy, the dilute Mn ions within Ge are in d5 electronic configuration. This Mn-doped Ge shows paramagnetism, as evidenced by the unsaturated magnetic-field-dependent X-ray magnetic circular dichroism signal. Our study reveals how spinodal decomposition occurs and influences the formation of ferromagnetic Mn-rich Ge-Mn nanoclusters.
    Citation
    Liu C, Hübner R, Xie Y, Wang M, Xu C, et al. (2018) Ultra-fast annealing manipulated spinodal nano-decomposition in Mn-implanted Ge. Nanotechnology. Available: http://dx.doi.org/10.1088/1361-6528/aaefb1.
    Sponsors
    Authors acknowledge the ion implantation group at HZDR. This work is supported by National Natural Science Foundation of China (No. 11775061). The funding of TEM Talos by the German Federal Ministry of Education of Research (BMBF), Grant No. 03SF0451, in the framework of HEMCP is gratefully acknowledged. The author C. L. thanks the financial support by Chinese Scholarship Council (File No. 201706125070).
    Publisher
    IOP Publishing
    Journal
    Nanotechnology
    DOI
    10.1088/1361-6528/aaefb1
    Additional Links
    http://iopscience.iop.org/article/10.1088/1361-6528/aaefb1
    ae974a485f413a2113503eed53cd6c53
    10.1088/1361-6528/aaefb1
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