بررسي خواص مغناطيسي نانو ذرات فريت اسپينلي منگنز-روي (Mn(1-x)ZnxFe2O4) با رويكرد فركانس هاي بالا تهيه ضده از روش همرسوبي

Study of Magnetic Properties of Mn(1-x)ZnxFe2O4 Spinel Ferrite Nanoparticles Synthesized by Co-precipitation Method Specially for High Frequency

در تحقيق حاضر نانو ذرات فريت اسپينلي منگنز-روي( Mn(1-x)ZnxFe2O4) از محلول كلريدهاي منگنز، روي و آهن و محلول سود جهت بررسي خواص مغناطيسي با فاكتور بررسي گرديد. ميانگين ابعاد بلورك ها براي هر نمونه از پهن شدگي قله (311) توسط فرمول شرر ، 6 الي 11 نانومتر محاسبه شده است. منحني پسماند مغناطيسي , و ابر پارا مغناطيس براي ديگر نمونه ها و عدم اشباع 0 . 2 كه بوسيله دستگاه AFGM بدست آمده تاييد كننده خواص فري مغناطيسي براي نمونه هاي مغناطيسي نمونه ها تا ميدان حداكثر 9000 آرسند مي باشد. همچنين در اثر افزودن روي (Zn1) به فريت (6)MinFe پسماند مغناطيسي (M) و نيروي وادار ندگي (M) كاهش مي يابند.

In this research the Mn(1-x)ZnxFe2O4 spinel ferrite nanoparticles (with x= 0, 0.2, 0.4, 0.6, 0.0, 1) have been synthesized using from chlorides of manganese , zinc and iron and sodium hydroxide by co-precipitation method. The ferrite crystalline phase and the particle size of the resulting nanoparticles were studied by X-ray diffraction. The average crystallite size of each sample was calculated from the broadening of the most intense peak (311), using Scherrer’s formula and the results show crystallite sizes increased from 6 to 11 nm. M-H curves of the samples were studied by AGFM and they were shown that the synthesized nanoparticles were ferrimagnetic for x=0, 0.2 and the other samples have shown superparamagnetic behavior and did not saturate at maximum field of 0000 Oe. Also, maximum magnetization, retentivity (Mr) and coercivity (Hc) decreased by increasing zinc content to MnFe2O4 ferrite