A weak magnetism observed in SnO₂ doped with Fe by means of Perturbed Gamma-Gamma Angular Correlation and M枚ssbauer Spectroscopy

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• 作者：J.M. Ramos^a ; A.W. Carbonari^a ; T. Martucci^a ; M.S. Costa^a ; G.A. Cabrera-Pasca^a ; M.A.V. Macedo Jr.^b ; R.N. Saxena^a
• 关键词：PAC Spectroscopy ; M&scaron ; ssbauer Spectroscopy ; Tin dioxide ; Diluted Magnetic Semiconductors ; 111In ; Doping with Fe
• 刊名：Physics Procedia
• 出版年：2012
• 期刊代码：P128_18753892
• 类别：ph
• 出版时间：2012
• 卷：28
• 期：Complete
• 页码：90-94
• 文件大小：883 K

摘要

Nano-structured samples of SnO2 doped with Fe prepared by the sol-gel method were studied by the Perturbed Gamma-Gamma Angular Correlation (PAC) Spectroscopy using ¹¹¹In (¹¹¹Cd) probe nuclei as well as by 57Fe M拧ssbauer spectroscopy. The samples were prepared from very pure metallic Sn and Fe. Carrier-free ¹¹¹In nuclei were introduced during the sol-gel process of sample preparation for PAC measurements. The PAC measurements were carried out after annealing the samples at different temperatures and the results show a combined electric quadrupole and magnetic dipole interaction for probe nuclei that do not occupy the regular Sn sites. The hyperfine parameters revealed weak magnetic interactions.