کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1815072 1525242 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Anomalous magnetic behavior in FePt nanoparticles chemically synthesized with polymer protective agent
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Anomalous magnetic behavior in FePt nanoparticles chemically synthesized with polymer protective agent
چکیده انگلیسی

FePt nanoparticles protected by poly(N-vinyl-2-pyrrolidone) (PVP) as a protective agent are synthesized by a chemical route. Diameter dependence of coercivity at low temperatures below ∼20 K for the FePt nanoparticles synthesized at various reaction temperatures exhibits an anomalous magnetic behavior; the coercivity increases with decreasing particle-diameter, which is different from a particle-size dependence of coercivity explained by thermal fluctuation effect. We discuss the anomalous magnetic behaviors associating with a surface effect due to coordinate bonds between PVP and the surface of the FePt nanoparticles.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 404, Issues 14–15, 1 July 2009, Pages 2080–2085
نویسندگان
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