کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5490643 | 1524795 | 2017 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A portable Hall magnetometer probe for characterization of magnetic iron oxide nanoparticles
ترجمه فارسی عنوان
یک پروب مغناطیسی سالن قابل حمل جهت مشخص کردن نانوذرات اکسید آهن مغناطیسی
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کلمات کلیدی
مغناطیس سنج هال، خواص مغناطیسی، نانوذرات اکسید آهن،
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
چکیده انگلیسی
We have built a portable Hall magnetometer probe, for measuring magnetic properties of iron oxide nanoparticles, that can be used for bulk materials and liquid samples as well. The magnetometer probe consists of four voltage-programmable commercial Hall sensors and a thin acrylic plate for positioning the sensors. In order to operate, it needs to be attached to a pole of an electromagnet and connected to an AD converter and a computer. It acquires a complete magnetization curve in a couple of minutes and has a magnetic moment sensitivity of 3.5Ã10â7 Am2. We tested its performance with magnetic nanoparticles containing an iron oxide core and having coating layers with different sizes. The magnetization results obtained were compared with measurements performed on commercial stand-alone magnetometers, and exhibited errors of about ±0.2 Am2/kg (i.e 0.4%) at saturation and below 0.5 Am2/kg (i.e. 10%) at remanence.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 426, 15 March 2017, Pages 159-162
Journal: Journal of Magnetism and Magnetic Materials - Volume 426, 15 March 2017, Pages 159-162
نویسندگان
Jefferson F.D.F. Araujo, Mateus C. Costa, Sonia R.W. Louro, Antonio C. Bruno,