Abstract
Nanoparticles of Fe-doped In2O3 [(In1−x Fe x )2O3, 0 ≤ x ≤ 0.10] are prepared by a simple polymerized complex method using indium (III) nitrate hydrate, iron (III) nitrate nonahydrate and polyvinyl pyrrolidone as the starting materials. The XRD, Raman and electron diffraction analysis results indicated that the calcined samples have the cubic structure of In2O3. An X-ray absorption spectroscopy including X-ray absorption near-edge spectroscopy is used in order to address both qualitative and quantitative of doped Fe valence states. The undoped sample exhibits a diamagnetic behavior, whereas all the Fe-doped samples are ferromagnetic having the magnetizations of ~0.0019–0.2959 emu/g at 10 kOe. Our results indicate that room-temperature ferromagnetism of Fe-doped In2O3 system is intrinsic and is not a result of any ferromagnetic impurity phases.
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Acknowledgments
The authors would like to thank the Synchrotron Light Research Institute (BL5.2) (Public Organization), Nakhon Ratchasima, Thailand, for XAS facilities. This work was supported by the Thailand Research Fund (TRF), the Commission on Higher Education (CHE) and Mahasarakham University (MSU), Thailand (Contract No. MRG5480053).
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Wongsaprom, K., Sonsupap, S., Maensiri, S. et al. Room-temperature ferromagnetism in Fe-doped In2O3 nanoparticles. Appl. Phys. A 121, 239–244 (2015). https://doi.org/10.1007/s00339-015-9416-5
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DOI: https://doi.org/10.1007/s00339-015-9416-5