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مجله مواد الکترونیکی 2013
جزئیات رویداد
همایش ، رویداد ، ژورنال
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  • cluster and thickness dependence of ferromagnetism in nickel in situ-doped amorphous aln thin films

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    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 803
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    • شماره تماس دبیرخانه رویداد: -
     we report on magneto-optical investigations of ni-doped amorphous ain (a_ ain) thin films. thea_ ainwas grown by radiofrequency (rf) sputtering on si (0001) substrates at low temperature and doped with ni at fixed concentrations with different a_ ain layer thicknesses. as-grown a_ ain:ni layers were annealed up to 900°c for 5 min and 15 min time duration in nitrogen ambient at atmospheric pressure. each sample was characterized by the magneto-optical kerr effect (moke) in both polar and longitudinal geometries. only the 65-nm-thick a_ ain:ni layers showed linear enhancement of magnetization after thermal treatment up to 900°c, indicating the presence of a critical a_ ain:ni layer thickness supporting the formation of magnetic domains. no measurable moke signal was observed in the longitudinal geometry for any tested samples with different thicknesses. this observation confirms that the easy magnetization axis in a_ ain:ni layers is out of plane due to the strong magnetic anisotropy observed in polar moke geometry. the morphology of as-grown and annealed a_ ain:ni films was characterized by atomic force microscopy (afm), magnetic force microscopy (mfm), and scanning electron microscopy (sem) and revealed the existence of nanoclusters. the size distribution of nanoclusters was studied as a function of annealing time an

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