Investigations of Magnetic Properties Through Electrodeposition Current and Controlled Cu Content in Pulse Electrodeposited CoFeCu Nanowires

نانوسيم هاي CoFeCu با روش نشست الكتريكي پالسي داخل قالب هاي آلوميناي متخلخل با تكنيك آندايز نرم دو مرحله اي نشست داده شد. جريان هاي استفاده شده عبارتند از: 3.5، 4.25، 5 و 6 ميلي آمپر. تاثير جريان نشست الكتريكي و آنيلينگ بر روي خواص مغناطيسي بررسي شد. نانوسيم هاي ساخته شده داراي قطر 30نانومتري و فاصله 100 نانومتري بين حفره ها مي باشد. CoFe دارايشبكه بلورbcc و مس داراي شبكه بلور fcc مي باشد. با افزايش ميزان جريان الكتريكي تا مقدار بهينه، ميزان مس كاهش يافته و كورسيويتي و مغناطش افزايش مي يابد. انيلينگ، كورسيويتي را بهبود داده و بيشترين كورسيويتي در جريان 5 ميلي اپر به دست آمد. پس ازآنيلينگ، مغناطش همه نمونه ها كاهش يافت.

CoFeCu nanowires were deposited by pulsed electrodeposition technique into the porous alumina templates by a two-step mild anodization technique, using the single-bath method. The electrodeposition was performed in a constant electrolyte while Cu constant was controlled by electrodeposition current. The electrodeposition current was 3.5, 4.25, 5 and 6 mA. The effect of electrodeposition current and annealing on the magnetic behavior of the nanowires was investigated. Nanowires were fabricated with 30nm diameter and 100nm inter-pore distance with both bcc-CoFe and fcc- Cu phases. With increasing the electrodeposition current the Cu content decrease and the coercivity and magnetization increase up to its optimum value, then decrease. Annealing improved the coercivity, maximum coercivity was obtained for sample fabricated at 5 mA current. After annealing the magnetization decrease for all sampls. The X-ray diffraction pattern of the sample at electrodeposition current 3.5 mA after annealed indicates that Cu and CoFe phases separately was formed and separate peak related to CoFeCu alloy structure is not seen.