Mössbauer studies and magnetic properties of SnO2 doped with 57Fe

Sakuma, J.; Nomura, Kiyoshi; Barrero, C. A.; Takeda, M.

doi:10.1016/j.tsf.2007.03.123

Cited by 46 publications

(32 citation statements)

References 9 publications

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“…The occurrence of doublet D2 in the spectra clearly shows the existence of defects, which have an essential role in the appearance of ferromagnetism. Our 119 Sn results are in good correspondence with those obtained by the help of 57 Fe spectroscopy [4]. The spectrum of Fe 0.1 Sb 0.05 Sn 0.85 O 2−δ shows that the largest line-widths, which suggest a magnetic component because of a very large defect induced magnetism, was indicated by the magnetic measurements in the sample when Fe/Sb = 2/1.…”

Section: Resultssupporting

confidence: 88%

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119Sn Mössbauer study of sol–gel synthetized Fe x Sb y Sn1 − x − y O2 − δ powders

et al. 2008

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Section: Resultssupporting

confidence: 88%

“…Although only doublets of Fe 3+ were observed in 57 Fe Mössbauer spectra, the samples annealed at 500 • C showed ferromagnetic properties at room temperature. It suggests that the oxygen defects induced ferromagnetism at room temperature [4,5].…”

Section: Introductionmentioning

confidence: 99%

119Sn Mössbauer study of sol–gel synthetized Fe x Sb y Sn1 − x − y O2 − δ powders

et al. 2008

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“…Transparent diluted magnetic oxide semiconductors (DMS), which show ferromagnetism at room temperature, are expected to be one of the most intriguing spintronics materials [1,2]. Ferromagnetic behavior can occur as an impact of low concentration of doped magnetic atoms on wide gap semiconductors.…”

Section: Introductionmentioning

confidence: 99%

Vibration DOS of 57Fe and Zn doped rutile Sn(Sb) oxides

et al. 2011

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Sn oxides co-doped with Zn, Sb and 57 Fe were prepared by sol-gel method, and especially the doping effect of non-magnetic Zn ions was studied. The bulk saturation magnetization is in accordance with the intensity of the magnetic component in Mössbauer spectra. The nuclear inelastic scattering (NIS) spectra of these compounds were measured in SPring 8. The vibration density of states (VDOS) of 57 Fe doped Sn(Sb) oxides showed that the softening peaks around 15-20 meV appeared by doping less than 10% Zn ions. The clusters of non-magnetic ZnFe 2 O 4 may be most probably formed under the limit of XRD detections. The results suggest that the strengthening of ferromagnetism, which appears in the dilute Zn doping, may occur due to the spin arrangement of dilute Fe 3+ through magnetic defects rather than the formation of magnetic iron oxides.Keywords Vibration density of states (VDOS) · Mössbauer spectroscopy · Nuclear inelastic scattering · Diluted magnetic oxide semiconductors · Zn doping effect of Fe and Sb doped SnO 2

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“…Oxide diluted magnetic semiconductors, ODMS, in which nonmagnetic oxide semiconductors are doped with just a low percent of transition metal ions are expected to play an important role in the development of semiconductor spintronics [1,2]. Transition metal doped SnO 2 belong to these classes of materials [3][4][5]. Several synthetic methods to produce them have been explored, but many methods have the drawback of producing impurity phases and/or magnetic ion clustering.…”

Section: Introductionmentioning

confidence: 99%

Fe-doped SnO 2 nanopowders obtained by sol–gel and mechanochemical alloying with and without thermal treatment

et al. 2009

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The present work is aimed to compare the physical properties of Sn 1−x Fe x O 2−δ (x = 0, and 0.05) nanopowders obtained by sol-gel method, mechanochemical alloying, and mechanochemical alloying followed by thermal treatment. The X-ray diffraction of Sn 1−x Fe x O 2−δ samples prepared by sol-gel showed peaks due to the cassiterite phase of SnO 2 and their Mössbauer spectra showed ferromagnetic and paramagnetic signals. The samples obtained by the milling process of SnO 2 mixed with α-Fe showed Bragg peaks due to SnO 2 (rutile) with a line broadening caused by the reduction of grain sizes and the presence of microstrains. Mössbauer spectra for these samples revealed the presence of Fe 3+ as well as unreacted α-Fe. In the case of mechanochemical alloying with thermal treatment, the incorporation of Fe 3+ in the SnO 2 structure with the presence of impurities was observed.

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Mössbauer studies and magnetic properties of SnO2 doped with 57Fe

Cited by 46 publications

References 9 publications

119Sn Mössbauer study of sol–gel synthetized Fe x Sb y Sn1 − x − y O2 − δ powders

119Sn Mössbauer study of sol–gel synthetized Fe x Sb y Sn1 − x − y O2 − δ powders

Vibration DOS of 57Fe and Zn doped rutile Sn(Sb) oxides

Fe-doped SnO 2 nanopowders obtained by sol–gel and mechanochemical alloying with and without thermal treatment

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