The magnetic properties of BiY₂Fe₅O₁₂ nanoparticles doped with Cr ions

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• 作者：Biao Dong ; Hua Yang ; Yuming Cui ; Lianxiang Yu and Shouhua Feng
• 刊名：Journal of Materials Science
• 出版年：2007
• 出版时间：May, 2007
• 年：2007
• 卷：42
• 期：9
• 页码：3167-3171
• 全文大小：256 KB

文摘

BiY₂Cr _x Fe_5−x O₁₂ (x = 0, 0.05, 0.1, 0.2, 0.3) nanocrystals were synthesized by using a sol-gel method. Samples were characterized by the powder X-ray diffraction (XRD), the thermal gravity analysis (TGA) and the differential thermal analysis (DTA), the vibrating sample magnetometer(VSM) and M?ssbauer spectrums. The average sizes of the particles were determined by the Scherrer’s formula. The special Ms and M?ssbauer spectra of BiY₂Cr _x Fe_5−x O₁₂ nanocrystals are researched at room temperature. It is seen that the special Mss of samples are initially increased with increasing Cr3+ content (x < 0.1), and decreased with increasing content of Cr3+ ions (x > 0.1).