ویژگی‌های ساختاری، ریخت‌شناسی و مغناطیسی لایه نازک فریت Co-Zn تهیه شده به روش اسپری پایرولیز

نویسندگان

1 دانشگاه بیرجند

2 دانشگاه صنعتی بیرجند

چکیده

ویژگی­های ساختاری، ریخت­شناسی و مغناطیسی لایه­های نازک Co0/5Zn0/5Fe2O4 به روش تحلیل پراش پرتوX ، میکروسکوپ الکترونی روبشی گسیل میدانی(FE-SEM)  و مغناطیس­سنج نمونه­ی نوسانی(VSM)  بررسی شد. لایه­های نازک به روش افشانه آتشکافت (پایرولیز) لایه­نشانی، سپس در دماهای °C500 و °C600 تکلیس شدند. نتایج پراش پرتو X نشان داد که نمونه­های تکلیس شده، تک فازند و اندازه بلورک و ثابت شبکه، با افزایش دمای تکلیس زیاد می­شود. تصاویر FE-SEM از سطح نمونه­های تکلیس شده، توزیع همگنی از ذرات را نشان می­دهد. اندازه­ی ذرات بدست آمده نمونه­های تکلیس شده در دمای °C 500 و °C 600 به ترتیب حدوداً nm20 وnm  35 است. اندازه­گیری­های مغناطیسی در دمای اتاق برای دو حالت موازی و عمود بر سطح لایه نازک نشان می­دهد که با افزایش دمای تکلیس مغناطش و وادارندگی لایه­ها افزایش می­یابد که این می­تواند به دلیل مهاجرت یون­های غیرمغناطیسی Zn2+ از جایگاه هشت­وجهی به چاروجهی باشد.    

کلیدواژه‌ها


عنوان مقاله [English]

Structural, Morphological and Magnetic Properties of Co-Zn Ferrite Thin Films Deposited by Spray Pyrolysis

نویسندگان [English]

  • ahmad Amirabadizadeh 1
  • seyed amiabbas Emami 1
  • seyed mojtaba Alavi Sadr 2
1
2
چکیده [English]

The structural, morphological and magnetic properties of Co0.5Zn0.5Fe2O4 nanoferrite thin films on glass substrates were investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and vibrating sample magnetometer (VSM), respectively. These thin films were deposited by spray pyrolysis method and subsequently calcined at 500 and 600 ˚C. The XRD results reveal that the calcined samples have a single-phase, and their crystallite size and lattice parameter increase as the calcination temperature increases. FE-SEM images exhibit a homogeneous grain size distribution for calcined thin films, and the grains size of samples calcined at 500 and 600 ˚C are ~ 20 and 35 nm respectively. The room temperature magnetic measurements indicate that the magnetization and coercivity of the samples in both parallel and perpendicular direction to applied magnetic field increase with calcination temperature. These can be attributed to the migration of non-magnetic Zn2+ ions from octahedral to tetrahedral sites.
 

کلیدواژه‌ها [English]

  • Co-Zn ferrite
  • thin film
  • Structural properties
  • magnetic properties
  • Spray Pyrolysis
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