کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5467235 | 1518614 | 2017 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Positioning of cobalt atoms in amorphous carbon films by pre-selecting the hydrogen concentration
ترجمه فارسی عنوان
قرار دادن اتم کبالت در فیلم کربن آمورف با پیش انتخاب غلظت هیدروژن
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
چکیده انگلیسی
Amorphous carbon and hydrogenated amorphous carbon layers were implanted at room temperature with Co ions to investigate the role of hydrogen on the Co distribution. Amorphous carbon (a:C) and hydrogenated amorphous carbon (a:C-H) films were prepared by mass selective ion beam deposition with a 5Â kV acceleration voltage using C+ and C3H6+ ions, respectively. The typically 100Â nm thin films were implanted with Co using a 30Â kV acceleration voltage to a fluence of 4Â ÃÂ 1016Â cmâ2. Raman measurements showed that Co implantation in hydrogenated amorphous carbon causes increased sp2 clustering while in amorphous carbon there is significant rehybridisation of carbon from sp3 to sp2 bonding. High resolution Rutherford backscattering measurements indicated that in the absence of hydrogen in the base matrix, the implantation profile assumes a unimodal distribution as predicted by simulations. However, in the presence of hydrogen the effects of collision cascade enhanced diffusion are significant in altering the implantation profile resulting in a bimodal distribution. The difference in the Co depth distribution between a:C and a:C-H films is explained by the change in thermal conductivity of the carbon matrix in the presence of hydrogen. The ability to position Co (magnetic atoms) in the surface region of diamond-like carbon films offers great advantages for applications in novel magnetic devices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 409, 15 October 2017, Pages 116-120
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 409, 15 October 2017, Pages 116-120
نویسندگان
P. Gupta, G.V.M. Williams, S. Vajandar, T. Osipowicz, H.-W. Becker, K.-H. Heining, R. Hübner, J. Leveneur, J. Kennedy, A. Markwitz,