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Realization of sensible peak shift thermometry from multiple site occupied Eu3+ ions in magnetically frustrated SrGd2O4

  • Advanced Nanomaterials
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Abstract

Magnetically frustrated lattices even at low temperatures are well-known for not minimizing interaction energies. In a magnetically frustrated structure like strontium gadolinium oxide (SrGd2O4), there exists more than one suitable site for rare-earth doping due to availability of two low Gd3+ site symmetries. In the present work SrGd2O4 doped with Eu3+ ions were prepared by solid-state reaction method. Structural characterization confirms the nature of structure and bonding. Existence of different sites in the host lattice for the doped Eu3+ ions were observed via excitation spectra. Photoluminescence studies with varying temperature (15–300 K) have been extensively used with high-resolution to distinguish different sites in this structure. Studies confirm that apart of the Gd3+ sites, Sr2+ could also accommodate the Eu3+ ions. Variation of temperature that leads to shift in emission spectral peak positions has been thoroughly examined for line shift temperature sensing applicability. Low temperature uncovers emission peaks from 5D1 level that are unprovable at room temperature. Maximum relative sensitivity of 5D0 → 7F0 peak intensity to one of the multiple sites in SrGd2O4:Eu3+ has been found to be 12.08 × 10–3% K−1 while using McCumber-Sturge equation to quantify line shift.

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The authors are sole responsible for data and materials used. The data and the materials can be re-produced under specified conditions in the experimental section and available upon request.

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Acknowledgements

K.P. and S.K.J acknowledges the funding by national funds (OE), through FCT—Fundação para a Ciência e a Tecnologia, Portugal, I.P., in the scope of the framework contract foreseen in the numbers 4, 5 and 6 of the article 23, of the Decree-Law 57/2016, of August 29, changed by Law 57/2017, of July 19. This work was developed within the scope of the project i3N, UIDB/50025/2020 &UIDP/50025/2020, financed by national funds through the FCT/MEC. Jaesool Shim acknowledges the National Research Foundation of Korea (2020R1A4A1019227 and 2020R1A2C1012439) for the financial support. The authors thank Dr. Ricardo J.B. Pinto, CICECO, Department of Chemistry, University of Aveiro for his help in STEM characterization.

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Authors and Affiliations

  1. I3N & Department of Physics, University of Aveiro, 3810-193, Aveiro, Portugal

    K. Pavani, A. J. Neves, M. J. Soares, M. P. F. Graça & S. K. Jakka

  2. Department of Physics, Rajeev Gandhi Memorial College of Engineering and Technology (Autonomous), Nandyal, Andhra Pradesh, 518501, India

    B. C. Jamalaiah

  3. School of Engineering, Yeungnam University, Gyeongsan, 384541, Republic of Korea

    J. Shim & P. C. Nagajyothi

  4. CICECO – Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal

    Ricardo J.B.Pinto

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  1. K. Pavani
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  2. B. C. Jamalaiah
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  3. A. J. Neves
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  4. M. J. Soares
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  6. P. C. Nagajyothi
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  8. M. P. F. Graça
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  9. S. K. Jakka
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Contributions

All the authors participated in the work, however some dedicated more time to some specific activities, which we describe below: Conceptualization—KP; Methodology—software—SKJ, KP; Validation—SKJ, KP, BCJ; Formal analysis—SKJ, KP; Investigation—AJN, MJS, KP; Resources—AJN, MJS, RJBP; Data curation—BCJ, KP; Writing—original draft preparation—SKJ, KP; Writing-review and editing—KP, SKJ, PCN, JS; Visualization—KP, BCJ; Supervision—KP, AJN; Project administration—AJN; Funding acquisition—MPFG, AJN.

Corresponding authors

Correspondence to K. Pavani or J. Shim.

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The authors state that the workdone in the manuscript does not contain any experiments involving human/animal tissue and according to the journal ethical policy, all the ethical guidelines were followed.

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Handling Editor: M. Grant Norton.

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Pavani, K., Jamalaiah, B.C., Neves, A.J. et al. Realization of sensible peak shift thermometry from multiple site occupied Eu3+ ions in magnetically frustrated SrGd2O4. J Mater Sci 57, 8530–8543 (2022). https://doi.org/10.1007/s10853-022-07034-w

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