خواص ساختاری و مغناطیسی ذرات گارنت ایتریوم آهن با جانشانی یوروپیوم سنتز شده به روش سل- ژل

نویسندگان

دانشگاه آزاد اسلامی

چکیده

 در این پژوهش پودرهای بس­ریز گارنت ایتریوم آهن جانشانی شده با یوروپیوم با ترکیب EuxY۳-xFe۵O۱۲ و مقادیر جانشانی
(۲/۰، ۰/۱، ۰/۰ = x) به روش سل ژل تهیه شدند. تحلیل الگوهای پراش پرتو ایکس (XRD) ساختار تک فاز گارنت را در همه­ی نمونه­ها تایید کرد. با استفاده از آنالیزهای Far-FTIR و Raman، تشکیل فاز گارنت در همه­ی نمونه­ها مورد تائید قرار گرفت. چرخه­های پسماند بدست آمده از مغناطیس سنج نمونه­ی ارتعاشی (VSM) نشان دهنده­ی کاهش مغناطش اشباع با افزایش جانشانی یوروپیوم است. این تغییرات با استفاده از نظریه­ی نیل و شکافتگی حاصل از کج شدگی اسپینی در هر یک از زیر شبکه­های مغناطیسی پس از جانشانی یون Eu۳+  در ساختار گارنت ایتریوم آهن توضیح داده شد.      

کلیدواژه‌ها


عنوان مقاله [English]

Structural and magnetic properties of Yttrium Iron Garnet substituted by Europium Particles Synthesis by Sol-Gel Method

چکیده [English]

In this work, Europium ion (Eu3+) substituted yttrium iron garnet particles EuxY3-xFe5O12 (x=0.0, 1.0, 2.0) were synthesized by the sol-gel method. X-ray diffraction (XRD) patterns confirmed the pure garnet structure for all samples. The garnet phase was studied by using Far-FTIR and Raman spectroscopy. The results of vibrating sample magnetometer (VSM) represents that saturation magnetization decrease with increasing Europium ion concentration. These changes assigned to the Neel theory and spin canting after substituting Eu3+ in yttrium iron garnet.

کلیدواژه‌ها [English]

  • Sol-gel
  • Yttrium Iron Garnet
  • Europium
  • Raman Spectroscopy
  • Vibrating Sample Magnetometer
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