کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5407503 1393219 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Spin-glass-like magnetic ordering in Zn substituted magnetite magnetic fluids
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Spin-glass-like magnetic ordering in Zn substituted magnetite magnetic fluids
چکیده انگلیسی
Electron spin resonance (ESR) spectra of magnetic fluids involving polydispersed Zn0.5Fe0. 5Fe2O4 (FZ5) and Zn0.7Fe0. 3Fe2O4 (FZ7) nanomagnetic particles are scanned from 4.2 to 300 K. The FZ7 fluid exhibits certain distinct features below 40 K which are different from FZ5 fluid. These include (i) an isotropic shift in resonance field in zero-field-cooled ESR study, (ii) deviation of resonance field from sin2 θ behavior (where θ is the angle between axis of the particle and field) in field cooled (FC) sample and (iii) abrupt increase in anisotropy field for FC sample. The results are analyzed in light of the core-shell model for nanomagnetic particles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetic Resonance - Volume 187, Issue 2, August 2007, Pages 314-319
نویسندگان
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