Author/Authors :
Almasi Kashi، M نويسنده Department of Physics, University of Kashan, Kashan, P. O. Box. 87317–51167, Iran , Institute of Nanoscience and Nanotechnology, University of Kashan, , , Ramazani، A نويسنده Department of Physics, University of Kashan, Kashan, P. O. Box. 87317–51167, Iran, Institute of Nanoscience and Nanotechnology, University of Kashan, , , Asgari، V نويسنده Department of Physics, University of Kashan, Kashan, P. O. Box. 87317–51167, Iran , , Jafari- Khamse، E نويسنده Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan, P. O. Box. 87317–51167, Iran ,
Abstract :
در اين مقاله تاثير تغيير طول نانوسيم آلياژي NiFe بر روي خصوصيات مغناطيسي آن بررسي شد. قطر و طول هاي مختلف نانوسيم با استفاده از ميكروسكوپ الكتروني روبشي (SEM) تعيين گرديد. با استفاده از آناليز تفكيك انرژي (EDS) تركيب ساختار به صورت Ni0.3Fe0.7 تعيين شد. خصوصيات مغناطيسي بوسيله ي مناطيس سنج با نمونه ارتعاشي مورد بررسي قرار گرفت. نتايج نشان داد كه با افزايش طول نانوسيم از µm 0.1±1.9?به0.66 µm ± 13.3كورسيويتي از 1050 به 705 اورستد كاهش مي يابد.
Abstract :
The effect of length variation on the magnetic properties of NiFe
alloy nanowires electrodeposited into the alumina template was
investigated. The diameter (45±2.5 nm) and length (~ 1.9, 7.12, 8.3,
9.5 and 13.3 µm) of the nanowires were estimated from scanning
electron microscopy images. Energy dispersive spectroscopy results
showed Ni3Fe7 composition of the alloy nanowires. The magnetic
properties of the samples were investigated by vibrating sample
magnetometer. It showed that with increasing the length of the
nanowires from 1.9±0.1µm to 13.3±0.66 µm, coercivity reduced
from 1050 Oe to 705 Oe and squareness reduced from 0.64 to 0.46.
The results proved increasing the magnetostatic interaction between
the nanowires with length. Progress toward the multi-domain
behavior was predicted caused to drastically reduce in the coercivity.
