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Title: SnO2 doped with Mn, Fe or Co: Room temperature dilute magnetic semiconductors
Sponsor: Science Foundation Ireland
Author's Homepage:
Keywords: Physics
Issue Date: 2004
Publisher: American Institute of Physics
Citation: Fitzgerald CB, Venkatesan M, Douvalis AP, Huber S, Coey JMD, Bakas T 'SnO2 doped with Mn, Fe or Co: Room temperature dilute magnetic semiconductors' in Journal of Applied Physics, 95, (11), 2004, pp 7390 - 7392
Series/Report no.: Journal of Applied Physics
Abstract: Room temperature ferromagnetism is found in (Sn1−xMx)O2 (M=Mn, Fe, Co, x=0.05) ceramics where x-ray diffraction confirms the formation of a rutile-structure phase. Room temperature saturation magnetization of 0.2 and 1.8 Am2 kg−1 for (Sn0.95Mn0.05)O2 and (Sn0.95Fe0.05)O2, respectively, corresponds to a moment of 0.11 or 0.95 μB per Mn or Fe atom. The Curie temperatures are 340 and 360 K, respectively. The magnetization cannot be attributed to any identified impurity phase. 57Fe Mössbauer spectra of the Fe-doped SnO2 samples, recorded at room temperature and 16 K, show that about 85% of the iron is in a magnetically ordered high spin Fe3+ state, the remainder being paramagnetic.
Description: PUBLISHED
Appears in Collections:Physics (Scholarly Publications)

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