ساخت نانوساختارهای مغناطیسی ترکیب اکسید جدید Ni-Fe-Pb-Co به روش سل- ژل در حضور گاز آرگون و بررسی ویژگی‌های ساختاری و مغناطیسی آن

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه فیزیک، دانشکده علوم، دانشگاه شهید چمران اهواز، اهواز، ایران

چکیده

این پژوهش بر ساخت و بررسی ویژگی­های ساختاری و مغناطیسی اکسید مغناطیسی با ترکیب جدید
 Ni-Fe-Pb-Co سنتز شده به روش سل- ژل در حضور گاز آرگون متمرکز است. در این روش از نیترات نیکل، نیترات آهن، نیترات سرب و نیترات کبالت به عنوان پیش ماده و اسید سیتریک به عنوان یک عامل شلات ساز، استفاده شده است. پایداری گرمایی ترکیب اکسید جدید Ni-Fe-Pb-Co با گرما وزن­سنجی (TGA) ارزیابی شد. ویژ­گی­های ساختاری با پراش­سنج پرتو ایکس (XRD) و میکروسکوپ الکترونی روبشی گسیل میدانی (FESEM) بررسی گردیدند. از طیف‌سنجی تبدیل فوریه فروسرخ (FT-IR) برای بررسی پیوندهای شیمیایی ماده استفاده شد. ویژگی­های مغناطیسی با یک مغناطیس سنج نمونه ارتعاشی (VSM) مشخص شد. نتایج نشان داد که با افزودن کبالت تا مقدار 5/0 به سامانه Ni-Fe-Pb آماده (Co0.5-Pb Ni-Fe0.5-) به مغناطش اشباع بالا emu/g 82 می­رسد. طیف­های XRD نمونه­ها، تشکیل یک اکسید چندجزئی را آشکار می­کنند. تصاویر FESEM توزیع یکنواخت ذرات با تمایل به انباشت در دمای 900 را نشان می­دهد. دمای کوری اکسید مغناطیسی ترکیب Co0.5-Pb Ni-Fe0.5- ساخته‌شده در دمای 900  با ترازوی فاراده اندازه­گیری شد. برابر باK  771 بدست آمد که مقداری مطلوب است.

کلیدواژه‌ها

عنوان مقاله [English]

Fabrication of magnetic oxide nanostructures of novel Ni-Fe-Pb-Co alloy by sol-gel method in an argon atmosphere and investigation of its structural and magnetic properties

نویسندگان [English]

  • Syed Ebrahim Mousavi Ghahfarokhi
  • Massoumeh Gharibpoor
  • Khadijeh Helfi
Department of Physics, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
چکیده [English]

This research focuses on the fabrication and investigation of the structural and magnetic properties of magnetic oxide nanostructures of a novel Ni-Fe-Pb-Co alloy synthesized by the sol-gel method under argon gas. In this method, nickel nitrate, iron nitrate, lead nitrate and cobalt nitrate were used as precursor materials and citric acid as a chelating agent. The structural properties were investigated using X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). Fourier transform infrared spectroscopy (FT-IR) was used to investigate the chemical bonding of the substance. Also, the thermal stability of the compound was evaluated through thermal gravimetric analysis (TGA). The magnetic properties were determined using a vibrating sample magnetometer (VSM). The results showed that adding cobalt up to a concentration of 0.5 to the Ni-Fe-Pb system was found to increase the saturation magnetization. XRD analysis of the samples showed the formation of a multi-component oxide. FESEM images show uniform particle distribution with a tendency for the agglomeration at a temperature 900 ℃. The Curie temperature of the magnetic oxide nanostructures of Ni-Fe0.5-Co0.5-Pb composition synthesized at 900 ℃ was measured using a Faraday balance and its value is 771 K.

کلیدواژه‌ها [English]

  • cobalt-doped magnetic oxide
  • Ni-Fe-Pb-Co composition
  • sol-gel method
  • structural properties
  • magnetic properties

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سابقه مقاله

  • تاریخ دریافت: 09 آبان 1403
  • تاریخ بازنگری: 11 دی 1403
  • تاریخ پذیرش: 29 دی 1403

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