کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1612298 1516306 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characterization of magnetic NiFe nanoparticles with controlled bimetallic composition
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Characterization of magnetic NiFe nanoparticles with controlled bimetallic composition
چکیده انگلیسی


• Composition controllability was demonstrated for bimetallic Ni alloy nanoparticles.
• A linear increase of fcc lattice strain of the NiFe alloy with Fe% is revealed.
• The NiFe alloy nanoparticles are shown to exhibit a resistance to oxidation.
• Coercivity values lower than Ni are revealed for the NiFe alloy nanoparticles.

The exploration of the magnetic properties of bimetallic alloy nanoparticles for various technological applications requires the ability to control the morphology, composition, and surface properties. In this report, we describe new findings of an investigation of the morphology and composition of NiFe alloy nanoparticles synthesized under controlled conditions. The controllability over the bimetallic composition has been demonstrated by the observation of an approximate linear relationship between the composition in the nanoparticles and in the synthetic feeding. The morphology of the NiFe nanoparticles is consistent with an fcc-type alloy, with the lattice strain increasing linearly with the iron content in the nanoparticles. The alloy nanoparticles exhibit remarkable resistance to air oxidation in comparison with Ni or Fe particles. The thermal stability and the magnetic properties of the as-synthesized alloy nanoparticles are shown to depend on the composition. The alloy nanoparticles have also be sown to display low saturation magnetization and coercivity values in comparison with the Ni nanoparticles, in line with the superparamagnetic characteristic. These findings have important implications for the design of stable and controllable magnetic nanoparticles for various technological applications.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 587, 25 February 2014, Pages 260–266
نویسندگان
, , , , , ,