کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1804106 1024642 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Angular dependence of coercivity and remanence of Ni nanowire arrays and its relevance to magnetoviscosity
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Angular dependence of coercivity and remanence of Ni nanowire arrays and its relevance to magnetoviscosity
چکیده انگلیسی

Ni nanowire arrays with varying wire dimensions (diameter d, length l) and center-to-center distances dCC were synthesized by pulsed electrodeposition of Ni in porous Al templates. The magnetization-reversal behavior of the arrays was investigated by means of magnetometry for different angles θ between the wire axes and the applied magnetic field. The functional dependences of the characteristic parameters coercivity HC(θ) and reduced remanence mR/mS(θ) exhibit a strong dependence on the wire dimensions and the center-to-center distance. For instance, for nanowire arrays with d=40 nm, dCC=100 nm, and for θ=0°, the coercivity takes on a rather large value of μ0HC=85 mT and mR/mS≅94%; reducing dCC to 30 nm and d to 17 nm results in μ0HC=49 mT and mR/mS≅57%, an observation which suggests an increasing magnetostatic interwire interaction at increased (d/dCC)-ratio. The potential application of nanowires as the constituents of ferrofluids is discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 320, Issue 7, April 2008, Pages 1340–1344
نویسندگان
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