تهیه‌ی نانوذرات گارنت ایتریوم آهن (YIG) به روش سل-ژل و بررسی ویژگی‌های مغناطیسی آن
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Abstract:
In this work yttrium iron garnet (Y3Fe5O12 or YIG) nanoparticles have been prepared by sol-gel method, raw materials were dissolved in citric acid and warmed up and stirred to form a gel. Synthesized nanoparticles were characterized, using X-ray diffraction (XRD), FT-IR and TG-DTA methods. Magnetic properties of the nanoparticles were measured, using vibrating sample magnetometer (VSM) and Faraday balance (M-T curve). XRD patterns showed that calcining temperature is far below than that is related to the bulk sample prepared by conventional ceramic technique. From the result of VSM and Faraday balance it was found that the saturation magnetization and Curie temperature of nanoparticles are lower than those related to the bulk sample. The decrease of saturation magnetization and Curie temperature were discussed based on core-shell model and superexchange interaction, respectively.
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اثرجانشانی سریوم بر ویژگی‌های ساختاری و مغناطیسی نانوذرات گارنت ایتریوم آهن تهیه‌شده به روش سل- ژل
In this work, Ce-YIG nanoparticles with nominal composition of Y3-xCexFe5O12 (x = 0, 0.1, 0.3, 0.4, 0.5, 0.6, 0.7 and 0.8) were first fabricated by sol-gel method and then the influence of the cerium substitution on the structural and magnetic properties of garnet nanoparticles were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), fourier transform infrared (FT-IR)...
full textبررسی تجربی اثر اندازه‌ی بلورک بر ویژگی‌های ساختاری و مغناطیسی نانوذرات گارنت ایتریوم آهن ساخته شده به روش سل ژل
In this study, we have prepared nanopowders of Yttrium Iron Garnet (YIG). Phase formation and crystalline structure were investigated by X-ray diffraction (XRD) and IR spectroscopy. Room temperature saturation magnetizations (Ms) of the samples were evaluated using a vibrating samples magnetometer (VSM). The results show that the size of nanoparticles renge from 70 to 250 nm. The results of str...
full textاثر جانشانی آنتیموان بر ویژگی ساختاری و مغناطیسی گارنت ایتریوم آهن تهیه‌شده به روش سل ژل
In this study, antimony substituted yttrium iron garnet with a composition of (x = 0, 0.1, 0.2) nanoparticles were fabricated by Sol-Gel method. Garnet phase formation were investigated by X-Ray diffraction (XRD) and Fourier transform infrared spectroscopy (Far FT-IR). X-ray diffraction results show that the samples in addition to garnet phase has impurity phases of YIP, α-Fe2O3 and Sb2O4 whi...
full textاثر جانشانی ساماریوم بر ویژگی‌های ساختاری و مغناطیسی نانوذرات گارنت ایتریوم آهن تهیه شده به روش سل- ژل
In this work, samarium ion (Sm3+) substituted yttrium iron garnet nanoparticles Y3-xSmxFe5O12 (x=0.0, 0.2, 0.3) were fabricated by the sol-gel method. X-ray diffraction (XRD) patterns confirmed the pure garnet structure for all samples. The garnet phase were studied, using, Far-FTIR. The results of vibrating sample magnetometer (VSM) represents that saturation magnetization decrease with increa...
full textاثر جانشانی آلومینیوم بر ویژگی‌های ساختاری و مغناطیسی نانوذرات گارنت ایتریوم آهن تهیه شده به روش سل- ژل
In this study, aluminum ion (Al3+) substituted yttrium iron garnet nanoparticles Y3AlxFe5-xO12 (x = 0.0, 0.2, 0.4) were fabricated by the sol-gel method. X-ray diffraction (XRD) patterns confirmed the pure garnet structure for all samples. The chemical bonds and the garnet phase were studied by using FT-IR, Far-FTIR. The cation distribution and the magnetic hyperfine parameters were obtained by...
full textبررسی ویژگی‌های مغناطیسی و بیناب سنجی موسبائر ذرات گارنت ایتریوم آهن بیسموتی Y3-xBixFe5O12 تهیه شده به روش سل-ژل
In this research, Y3-xBixFe5O12 x = (0, 0.1, 0.2, 0.3) were synthesized by a sol–gel method. X-ray diffraction (XRD) patterns confirmed the pure spinel structure for all samples. The magnetic properties of the samples were investigated by the vibration sample magnetometer (VSM). The results obtained from VSM showed that saturation magnetization increases up to x = 0.1 and then decreases for x>...
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Journal title
volume 18 issue 2
pages 281- 286
publication date 2010-07
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