پژوهش سیستم های بس ذره ای

پژوهش سیستم های بس ذره ای

ساخت نانوساختارهای (Y3YbxFe5-xO12) جانشانی شده با ایتربیم به روش سل-ژل و بررسی خواص ساختاری و الکترومغناطیسی آن‌ها.

نوع مقاله : مقاله پژوهشی کامل

نویسندگان
گروه فیزیک، دانشکده علوم، دانشگاه شهید چمران اهواز، اهواز، ایران
چکیده
چکیده
در این پژوهش نانوساختارهای گارنت ایتریوم آهن جانشانی شده با یون ایتربیم با مقادیر
30/0 و 25/0، 20/15،0/1،0/0،0/ 0 X=به روش سل- ژل ساخته و ویژگی‌های ساختاری، ریخت شناسی، مغناطیسی و دی‌الکتریکی نمونه‌ها توسط آنالیز پراش پرتو ایکس، طیف‌سنجی فروسرخ‌ـ‌تبدیل فوریه، میکروسکوپ الکترونی روبشی گسیل میدانی مغناطیس‌سنج نمونه ارتعاشی و دستگاه LCR متر مشخصه‌یابی شدند. طبق الگوی پراش پرتو ایکس هیچ ناخالصی در نمونه‌های با میزان جانشانی یافت نشد. با افزایش میزان جانشانی تا فاز ناخالصی در نمونه‌ها ظاهر شده که این نشان دهنده آن است که حد حلالیت است. بررسی حلقة پسماند نشان داد که با افزایش میزان جانشانی، مغناطش اشباع نمونه‌ها افزایش و در به بیشنه خود رسید و سپس روندی کاهشی در پیش گرفت. همچنین نیروی وادارندگی و پسماند مغناطیسی با افزایش جانشانی روندی کاهشی داشت. از سوی دیگر جانشانی ایتربیم موجب کاهش ثابت دی-الکتریک، اتلاف دی‌الکتریک و رسانندگی الکتریکی متناوب شده است.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Synthesis of Ytterbium-Substituted (Y₃YbₓFe₅₋ₓO₁₂) Nanostructures by the Sol–Gel Method and Investigation of Their Structural and Electromagnetic Properties.

نویسندگان English

ٍٍSeyed Ebrahim Mousavi Ghahfarokhi
Esmailvandi Amin
Department of Physics, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
چکیده English

In this study, ytterbium-substituted yttrium iron garnet (Y3YbxFe5-xO₁₂) nanostructures were synthesized via the sol–gel method with different substitution amounts of ytterbium ions The structural, morphological, magnetic, and dielectric properties of the samples were characterized using X-ray diffraction, Fourier-transform infrared spectroscopy, field-emission scanning electron microscopy, vibrating sample magnetometry, and an LCR meter. According to the X-ray diffraction patterns, no impurity phase was detected in the ytterbium-substituted samples with a substitution amount of whereas with further substitution of the amount an impurity phase of appeared in the samples, indicating that represents the solubility limit of Yb in the YIG lattice. Analysis of the magnetic hysteresis loop showed that, with increasing Yb substitution, the saturation magnetization increased and reached its maximum value of at the substitution amount after which it began to decrease. Moreover, the coercivity and magnetic remanence exhibited a decreasing trend with ytterbium substitution. On the other hand, Yb substitution led to a reduction in the dielectric constant, dielectric loss, and AC electrical conductivity of the samples.

کلیدواژه‌ها English

Yttrium Iron Garnet (YIG)
sol–gel method
Nanostructures
magnetic properties
electrical properties
magnetic permeability
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دوره 15، شماره 2 - شماره پیاپی 45
تابستان 1404
تابستان 1404
صفحه 1-16

  • تاریخ دریافت 12 آبان 1404
  • تاریخ بازنگری 09 آذر 1404
  • تاریخ پذیرش 09 آذر 1404