Room-temperature ferromagnetism in pure and Mn doped SnO2 powders |
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| Authors: | SA Ahmed |
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| Institution: | 1. Département de Physique, Faculté des Sciences de Tunis, Université de Tunis El Manar 2092, Tunisia;2. Laboratoire des Matériaux Avancés et Phénomènes Quantiques, Département de Physique, Faculté des Sciences de Tunis, Université Tunis El-Manar, Tunis, Tunisia;3. UMET, UMR CNRS 8207, Université Lille 1, 59655 Villeneuve d''Ascq Cédex, France;4. Institut d’électronique, de microélectronique et de nanotechnologie, UMR CNRS 8520, Université Lille1, Cité scientifique, Avenue Poincaré – CS 60069, 59652 Villeneuve d''Ascq Cedex, France;1. Department of Physics, Sri Venkateswara University, Tirupati 517502, India;2. Department of Chemistry and Chemical Institute for Functional Materials, Pusan National University, Busan 609-735, Republic of Korea;3. Department of BIN Fusion Technology & Department of Polymer-Nano Science and Technology, Chonbuk National University, Jeonju, Jeonbuk, Republic of Korea |
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| Abstract: | We report here observation of ferromagnetism in pure and Mn doped SnO2 powder with different Mn contents. Magnetic measurements revealed that all samples exhibit room temperature ferromagnetism (RTFM), which is identified as an intrinsic characteristic. The RTFM has been observed in the pure SnO2 powder, which is believed to be defect induced, with a saturation magnetization of ～0.017 emu/g. The RTFM was enhanced considerably in the Mn doped samples and the magnetic properties strongly depend on doping content. A sample with 1% of Mn is ferromagnetic at room temperature with a saturation magnetization of ～0.98 emu/g, a remanent magnetization of ～27%, and a coercivity of ～270 Oe. The average magnetic moment per Mn atom decreases with increasing Mn content. Our results reveal that the large RTFM observed in Mn doped SnO2 powder originates from a combination effect of oxygen vacancies and transition metal doping. |
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