اثر دمای پخت بر ویژ‌گی‌های ساختاری و الکترومغناطیسی نانوساختارهای گارنت ایتریوم آهن سنتز شده به روش سل-ژل

نوع مقاله : پژوهشی

نویسندگان

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

10.22128/ijcm.2025.3000.0

چکیده

در این پژوهش، نانوساختار گارنت ایتریوم آهن () به روش سل- ژل سنتز و اثر دمای پخت بر ویژ­گی‌های ساختاری، مغناطیسی و الکتریکی آن بررسی شد. نمونه‌های پخت شده در دماهای مختلف با پراش سنج پرتوی ایکس (XRD)، طیف­سنج تبدیل فوریه فروسرخ (FTIR)، میکروسکوپ الکترونی روبشی گسیل میدانی (FESEM)، مغناطیس سنج نمونه ارتعاشی (VSM) و LCR سنج (L : القائیدگی، C: ظرفیت و R: مقاومت) بررسی شدند. تحلیل الگوهای پراش پرتو ایکس بیانگر تشکیل تک فاز گارنت مکعبی در دماهای بالاتر از °C  800  بود. اندازة نانوبلورک‌ها با رابطة شرر در گستره 56-34 نانومتر محاسبه شد. بررسی نمودار پسماند مغناطیسی نشان داد که مغناطش اشباع نمونه‌ها با بالا رفتن دما افزایش نسبی یافته و در دمای °C  900  به مقدار بیشینه  رسید است. بررسی­های دی‌الکتریک نشان داد که با افزایش بسامد از HZ 100 تا MHZ10 ثابت دی‌الکتریک و اتلاف دی­الکتریک به‌طور قابل توجهی کاهش و رسانندگی الکتریکی افزایش یافته است. نفوذپذیری مغناطیسی نیز در نمونه پخت ‌شده در°C  900 بیشترین مقدار را داشت و با افزایش بیشتر دما روند کاهشی نشان داد.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of Sintering Temperature on Structural and Electromagnetic Properties of Yttrium Iron Garnet Nanostructures Synthesized by Sol-Gel Method

نویسندگان [English]

  • Seyed Ebrahim Mousavi Ghahfarokhi
  • Amin Esmail Vandi Lori
Department of Physics, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
چکیده [English]

In this study, the nanostructure of yttrium iron garnet (YIG) synthesized by the sol-gel method and the effect of annealing temperature on its structural, magnetic, and electrical properties were investigated. The dry gel was baked at different temperatures (600 to 1100 °C) and the samples were analyzed using XRD, FTIR, FESEM, VSM, and LCR tests. The results showed that at a temperature, the pure cubic garnet phase was formed and the size of the nanocrystals grew uniformly. At this temperature, the saturation magnetization was maximum and the magnetic and electrical losses were minimum, which led to the improvement of magnetic and electromagnetic properties. Also, the reduction of dielectric losses and the increase in magnetic permeability have made the sample a suitable option for application in high-frequency components such as microwave filters, magnetic sensors, and storage devices.

 

کلیدواژه‌ها [English]

  • Yttrium iron garnet (YIG)
  • sol-gel method
  • sintering temperature
  • magnetic properties
  • electrical properties
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