Abstract
Cd/CdO submicron particle sets (Ps) with average particle sizes of about 1 μm were prepared by using the modified levitation-jet method through condensation of metallic cadmium vapor in helium gas flow with an appropriated in situ oxidation. Scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and vibrating sample magnetometry were used for the Ps characterization. Room-temperature ferromagnetism with maximum saturation magnetization up to 37 memu/g was discovered in the Ps with nanostructured polymorphic layered (terraced) morphology. This magnetization has achieved its maximum when CdO content was about 1.2 at.%. Ps with maximum magnetization possessed a certain unit cell volume of the Cd component. It is suggested that the observed ferromagnetic ordering may be related to intrinsic Cd defects in the Cd side of Cd/CdO interface areas.
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Authors thank Prof. A.M. Ionov and Dr. R.N. Mozhchil, ISSP RAS, for XPS spectra measurements.
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Morozov, I.G., Belousova, O.V. & Kuznetcov, M.V. Room-temperature ferromagnetism in nanostructured submicron Cd/CdO particles. J Mater Sci: Mater Electron 31, 6664–6670 (2020). https://doi.org/10.1007/s10854-020-03222-z
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DOI: https://doi.org/10.1007/s10854-020-03222-z