Magnetic Properties of Ni0.3Fe0.7 Alloy Nanowires

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.

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.