کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7845093 | 1508424 | 2015 | 71 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structure and order in cobalt/platinum-type nanoalloys: from thin films to supported clusters
ترجمه فارسی عنوان
ساختار و نظم در نانوآلیاژهای کبالت / پلاتین: از فیلم های نازک به خوشه های پشتیبانی شده
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
چکیده انگلیسی
Among nanoalloys, Co-Pt type (CoPt or FePt) supported nanostructures are very interesting systems due to the direct link between atom arrangement and magnetic behavior. In addition, these alloys become model systems in the field of nanoalloys, due to the diversity of atom arrangements either present in the bulk state or specific to the nanoscale (chemically ordered L10, L12, or disordered fcc structures, core-shell, five-fold structures - icosahedral or decahedral, etc.). The synergy between experimental and modeling efforts has allowed the emergence of an overview of the structural, morphological and chemical behaviors of CoPt-based supported nanoparticles in terms of phase diagrams (temperature, composition, size effect), kinetic behavior (growth, annealing, ordering), and also in terms of environment effects (substrate, capping, matrix, gas) and of magnetic properties. All aspects of this complexity are reviewed: synthesis strategies (physical deposition, cluster beam deposition and wet chemical methods), magnetic behavior (atomic magnetic moment, magnetic anisotropy energy), structural transitions (non-crystalline/crystalline structures, order/disorder, surface/interface segregation), etc. In this field, the investigation techniques, such as electron microscopy and X-ray scattering or absorption techniques, are generally used at their ultimate limit due the small size of the studied objects. Finally, several aspects of the annealing process, which is a key phenomenon to achieve the chemical order, have been discussed in both thermodynamic and kinetic points of view (size effect, critical temperature, annealing time, twinning, coalescence, etc.).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science Reports - Volume 70, Issue 2, June 2015, Pages 188-258
Journal: Surface Science Reports - Volume 70, Issue 2, June 2015, Pages 188-258
نویسندگان
Pascal Andreazza, Véronique Pierron-Bohnes, Florent Tournus, Caroline Andreazza-Vignolle, Véronique Dupuis,