اثر میدان مغناطیسی بر خواص نانو ذرات مغناطیسی Fe3O4 ساخته شده به روش هم رسوبی

نویسندگان

1 دانشکده فیزیک، دانشگاه علم و صنعت ایران، تهران، ایران

2 آزمایشگاه تحقیقاتی کاتالیزورها و سنتز آلی، دانشکده شیمی، دانشگاه علم و صنعت ایران، تهران، ایران

چکیده

در این مقاله نانوذرات مغناطیسی اکسید آهن Fe3O4 با استفاده از روش هم‌رسوبی در دمای اتاق در دو حالت با حضور میدان مغناطیسی و در غیاب میدان مغناطیسی ساخته شدند. خواص مغناطیسی نانوذرات توسط دستگاه مغناطیس سنجی نمونه ارتعاشی VSM برای بررسی ویژگی‌های ابرپارامغناطیسی نانوذرات و اثر اعمال میدان بر خواص مغناطیسی نانوذرات مورد بررسی قرار گرفت. نتایج این آنالیز نشان داد که اعمال میدان مغناطیسی در هنگام ساخت نانوذرات، باعث کاهش مغناطش اشباع می‌شود. نتایج الگوی پراش اشعه ایکس XRD کاهش بلورینگی نانوذرات را با اعمال میدان مغناطیسی در حین ساخت نشان می‌دهند. طیف سنجی فوریه فروسرخ FT-IR تشکیل پیوندهای اکسیدآهن را در نمونه‌های ساخته شده تائید می‌کند. کاهش مغناطش اشباع و بلورینگی را می‌توان به اثر میدان مغناطیسی در جهت دهی دوقطبی‌های مغناطیسی نانوذرات در هنگام ساخت، نسبت داد.

کلیدواژه‌ها


عنوان مقاله [English]

The effect of magnetic feild on the properties of Fe3O4 nanoparticlessynthesized by co-precipitation method

نویسندگان [English]

  • N. Dehghani 1
  • M. Babamoradi 1
  • A. Maleki 2
1 Department of Physics, Iran University of Science and Technology, Tehran, Iran.
2 Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, Iran
چکیده [English]

In this paper, Fe3O4 magnetic nanoparticles were synthesized by a co-precipitation method at room temperature with and without magnetic field during the synthesizing process. Their magnetic properties were measured by vibrating sample magnetometer VSM instrument. VSM was used for studding the paramagnetic properties of the nanoparticles and the effect of the magnetic field on the magnetic properties of nanoparticles. The results showed that the presence of magnetic field during the synthetic, reduces the saturation magnetization value. The X-ray diffraction XRD pattern reveals the low crystallinity for the synthesized nanoparticles in the presence of magnetic field. The Fourier-transform infrared spectroscopy confirms the chemical bond formation. The reduction of saturation magnetization value and the crystallinity of nanoparticles can be related to the magnetic dipole orientation with the magnetic field.
 

کلیدواژه‌ها [English]

  • Fe3O4 magnetic nanoparticles
  • co-precipitation method
  • magnetic field
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