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Thermoanalytical (TG/DSC/EVG–GC–MS) characterization of the lanthanide (Ho) iron garnet formation in sol–gel

Thermal process

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Abstract

In the present study, the investigation of formation mechanism of holmium iron garnet (Ho3Fe5O12, HoIG) prepared by an aqueous sol–gel method was reported. We specifically focused on the identification of species released during the thermal decomposition of the Ho–Fe–O precursor gel using thermal analysis method. The formation of holmium iron garnet phase and some magnetic properties were investigated by X-ray diffraction analysis, Mössbauer spectroscopy and TG–DSC measurements. Evolved gas analysis of the decomposition products of gel precursor was performed by coupled TG–GC–MS method. In addition, the Curie temperatures of series of rare earth iron garnets were measured using thermal analyser with the small permanent magnet. The influence of the transition temperature from ferrimagnetic to paramagnetic state on the nature of lanthanide element in the iron garnets has been also investigated.

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Acknowledgements

This research was funded by a Grant (No. S-LZ-17-6) from the Research Council of Lithuania.

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Authors and Affiliations

  1. Department of Inorganic Chemistry, Vilnius University, Naugarduko 24, 03225, Vilnius, Lithuania

    Olga Opuchovic & Aivaras Kareiva

  2. Department of Inorganic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030/8, 12843, Prague 2, Czech Republic

    Daniel Niznansky

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  1. Olga Opuchovic
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  2. Daniel Niznansky
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  3. Aivaras Kareiva
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Correspondence to Olga Opuchovic.

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Opuchovic, O., Niznansky, D. & Kareiva, A. Thermoanalytical (TG/DSC/EVG–GC–MS) characterization of the lanthanide (Ho) iron garnet formation in sol–gel. J Therm Anal Calorim 130, 1085–1094 (2017). https://doi.org/10.1007/s10973-017-6492-0

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  • DOI: https://doi.org/10.1007/s10973-017-6492-0

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