دوره 31، شماره 2 - ( 3-1402 )
جلد 31 شماره 2 صفحات 404-393 |
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1- گروه فیزیک، دانشکده علوم، دانشگاه شهید چمران اهواز، اهواز، ایران
چکیده: (734 مشاهده)
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.
واژه‌های کلیدی: فریتبیسموت آلاییده با مس BiFe1-yCuyO3، ویژه‌گی‌های ساختاری، ویژه‌گی‌های مغناطیسی، ویژه‌گی‌های دیالکتریکی
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