عنوان مقاله :
اﺛﺮ ﻣﯿﺪان ﻣﻐﻨﺎﻃﯿﺴﯽ ﺑﺮ ﺧﻮاص ﻧﺎﻧﻮ ذرات ﻣﻐﻨﺎﻃﯿﺴﯽ 4 Fe3O ﺳﺎﺧﺘﻪ ﺷﺪه ﺑﻪ روش ﻫﻢرﺳﻮﺑﯽ
عنوان به زبان ديگر :
The effect of magnetic feild on the properties of Fe3O4 nanoparticles synthesized by co-precipitation method
پديد آورندگان :
دهقاني، نيلوفر دانشگاه علم و صنعت ايران - دانشكده فيزيك، تهران، ايران , بابامرادي، محسن دانشگاه علم و صنعت ايران - دانشكده فيزيك، تهران، ايران , ملكي، علي دانشگاه علم و صنعت ايران - دانشكده فيزيك، تهران، ايران
كليدواژه :
ﻧﺎﻧﻮذرات ﻣﻐﻨﺎﻃﯿﺴﯽ اﮐﺴﯿﺪ آﻫﻦ , روش ﻫﻢرﺳﻮﺑﯽ , ﻣﯿﺪان ﻣﻐﻨﺎﻃﯿﺴﯽ
چكيده فارسي :
در اﯾﻦ ﻣﻘﺎﻟﻪ ﻧﺎﻧﻮذرات ﻣﻐﻨﺎﻃﯿﺴﯽ اﮐﺴﯿﺪ آﻫﻦ (4 Fe3O) ﺑﺎ اﺳﺘﻔﺎده از روش ﻫﻢرﺳﻮﺑﯽ در دﻣﺎي 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) ﺑﺮاي ﺑﺮرﺳﯽ وﯾﮋﮔﯽﻫﺎي 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 اﻟﮕﻮي ﭘﺮاش اﺷﻌﻪ اﯾﮑﺲ (XRD) ﮐﺎﻫﺶ ﺑﻠﻮرﯾﻨﮕﯽ ﻧﺎﻧﻮذرات را ﺑﺎ اﻋﻤﺎل ﻣﯿﺪان ﻣﻐﻨﺎﻃﯿﺴﯽ در ﺣﯿﻦ ﺳﺎﺧﺖ ﻧﺸﺎن ﻣﯽدﻫﻨﺪ. ﻃﯿﻒ ﺳﻨﺠﯽ ﻓﻮرﯾﻪ ﻓﺮوﺳﺮخ (FT-IR) ﺗﺸﮑﯿﻞ ﭘﯿﻮﻧﺪﻫﺎي اﮐﺴﯿﺪآﻫﻦ را در ﻧﻤﻮﻧﻪﻫﺎي ﺳﺎﺧﺘﻪ ﺷﺪه ﺗﺎﺋﯿﺪ ﻣﯽﮐﻨﺪ. ﮐﺎﻫﺶ ﻣﻐﻨﺎﻃﺶ اﺷﺒﺎع و ﺑﻠﻮرﯾﻨﮕﯽ را ﻣﯽﺗﻮان ﺑﻪ اﺛﺮ ﻣﯿﺪان ﻣﻐﻨﺎﻃﯿﺴﯽ در ﺟﻬﺖ دﻫﯽ دوﻗﻄﺒﯽﻫﺎي ﻣﻐﻨﺎﻃﯿﺴﯽ ﻧﺎﻧﻮذرات در ﻫﻨﮕﺎم ﺳﺎﺧﺖ، ﻧﺴﺒﺖ داد.
چكيده لاتين :
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 sample synthesized in the presence of magnetic field has the saturation magnetization value as about 42 emu/gr. The saturation magnetization value for the synthesized sample in the absence of magnetic field is about 64 emu/gr. The X-ray diffraction (XRD) pattern revealed the low crystallinity for the synthesized nanoparticles in the presence of magnetic field in comparison with synthesized nanoparticles in the absence of magnetic field. The Fourier-transform infrared (FTIR) spectroscopy confirmed the chemical bond formation of the magnetic nanoparticles. The scanning electron microscopy (SEM) images showed the morphology of the nanoparticles. The reduction of saturation magnetization value and the crystallinity of nanoparticles can be related to the magnetic dipole orientation by the magnetic field during the synthesizing.
