تهیه نانوساختارهای چند فروئیک BiFe1-yCuyO3 به روش سل- ژل و بررسی ویژ‌گی‌های ساختاری، مغناطیسی و دی‌الکتریکی آن‌ها

نوع مقاله : مقاله پژوهشی

نویسندگان

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

چکیده

در این پژوهش، فریت­بیسموت (BiFeO3) آلاییده با مس BiFe1-yCuyO3 با مقادیر مس 30/0 و 25/0، 20/0، 15/0، 10/0، 05/0، 0/0 =y به­روش سل-ژل در دمای ˚C650 و زمان 60 دقیقه تهیه شد. با روش­های پراش پرتوی ایکس (XRD)، طیف­سنجی تبدیل فوریه فروسرخ (FT-IR)، میکروسکوپی الکترونی روبشی نشر میدانی (FESEM) و طیف­سنجی پراکندگی انرژی پرتوی ایکس (EDX)، ویژ­گی­های ساختاری نمونه­ها بررسی گردید. بررسی نشان داد که با افزودن Cu درصد فاز فریت­بیسموت کم و فازهای ثانویه چون  Bi2O3 ، Bi2CuO4 و Bi2Fe4O 9، بیشتر شده است. ویژ­گی­های ساختاری و دی­الکتریکی نمونه­ها با مغناطیس­سنج نمونه ارتعاشی  (VSM) و  LCRسنج بررسی شد. نتایج نشان داد که با افزودن Cu به نمونه­ها، ویژ­گی­ مغناطیسی آن­ها بهبود یافته است. ثابت دی‌الکتریک حقیقی و موهومی نمونه­ها با افزایش بسامد کاهش می­یابد که نشان­دهنده رفتار طبیعی دی­الکتریک در فریت بیسموت است.     

کلیدواژه‌ها

عنوان مقاله [English]

Synthesis of BiFe1-yCuyO3 multiferroic nanostructure by a sol-gel method and investigating of their structural, magnetic, and dielectric properties

نویسندگان [English]

  • Seyed Ebrahim Mousavi Ghahfarokhi
  • Adel Maryam
Department of Physics, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran.
چکیده [English]

In this research, the bismuth ferrite (BiFeO3) nanostructure doped with Cu was prepared by a sol-gel method at a temperature of 650 ºC in a period of 60 minutes. First, bismuth ferrite nanoparticles are provided, then its doping with Cu (BiFe1-yCuyO3) with y = 0.0, 0.05, 0.10 ,0.15 ,0.20, 0.25, and 0.30 has been done.  The structural properties of the samples have been characterized using the XRD, FESEM, FT-IR, and EDX. Investigations of the structural properties showed that as increasing Cu, the content of ferrite bismuth phase decreases and the secondary phases such as Bi2O3 ، Bi2CuO4 and Bi2Fe4O9 have increased. The magnetic and dielectric properties of the samples using the analyses of VSM, and LCR meter have been investigated. Investigations of the magnetic properties showed that as increasing Cu, the magnetic properties of the samples improved. The dielectric constant and the dielectric loss of the samples decrease with increasing frequency, which indicates the natural dielectric behavior of bismuth ferrite.

کلیدواژه‌ها [English]

  • Bismuth ferrite (BiFeO3)
  • BiFe1-yCuyO3
  • magnetic properties
  • Structural properties Dielectric properties

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  • تاریخ دریافت: 18 مهر 1401
  • تاریخ بازنگری: 20 دی 1401
  • تاریخ پذیرش: 25 دی 1401

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