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EPR/FMR Investigation of Mn-Doped SiCN Ceramics

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Abstract

SiCN magnetic ceramics doped with Mn2+ ions were synthesized at the pyrolysis temperature of 1,100° C, using CERASET™ as liquid polymer precursor and polymer manganese(II) acetylacetonate as dopant, and investigated by electron paramagnetic resonance (EPR)/ferromagnetic resonance (FMR) technique. The predominant source of ferromagnetism in SiCN samples doped with Mn ions, as synthesized here, is the ensemble of ferromagnetic nanoparticles of Mn5Si3C x incorporated into the amorphous SiC/Mn structure. The fluctuation of magnetization due to ferromagnetic Mn5Si3Cx particles significantly broadens the EPR lines at the phase-transition temperature (363 K). This is the first fabrication of a SiCN/Mn ceramic, which exhibits room-temperature ferromagnetism.

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Acknowledgments

S.A. and I.S. are grateful for support from Consortium de Recherché et d’ Innovation en Aerospatiale au Quebec (CRIAQ) and Pratt and Whitney, Canada. S.K.M. is grateful for partial financial support from the Natural Sciences and Engineering Research Council (NSERC) of Canada. Thanks are due Prof. D. Menard for magnetic properties measurements.

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Author notes

  1. S. I. Andronenko

    Present address: Physics Department, Kazan Federal University, Kremlevskaya 18, Kazan, 420008, Russian Federation

Authors and Affiliations

  1. Department of Mechanical and Industrial Engineering, Concordia Centre for Advanced Vehicle Engineering, Concordia University, 1455 de Maisonneuve Boulevard West, Montreal, QC, H3G 1M8, Canada

    S. I. Andronenko, Alfin Leo & I. Stiharu

  2. Physics Department, Concordia University, 1455 de Maisonneuve Boulevard West, Montreal, QC, H3G 1M8, Canada

    Sushil K. Misra

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  1. S. I. Andronenko
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  2. Alfin Leo
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  3. I. Stiharu
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Correspondence to Sushil K. Misra.

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Andronenko, S.I., Leo, A., Stiharu, I. et al. EPR/FMR Investigation of Mn-Doped SiCN Ceramics. Appl Magn Reson 39, 347–356 (2010). https://doi.org/10.1007/s00723-010-0163-7

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  • DOI: https://doi.org/10.1007/s00723-010-0163-7

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