All Stories

  1. Spectroscopic Properties of Tb3+ Ions in TbF3-Doped CaF2 Crystals

    Article • Materials, February 2026, MDPI AG

    PhD Marius Stef

  2. Spectroscopic analysis and Judd-Ofelt modelling of Tm3+ -doped BaF2 crystals

    Article • Optical Materials, January 2026, Elsevier

    PhD Marius Stef

  3. Unveiling vortex dynamics: FEM analysis of bluff body effects on heat transfer

    Article • International Communications in Heat and Mass Transfer, December 2025, Elsevier

    PhD Marius Stef

  4. Structural and optical properties of 5 mol% ErF3-doped fluoride crystals

    Article • Physica Scripta, September 2025, Institute of Physics Publishing

    PhD Marius Stef

  5. Principal component analysis luminescence thermometry of Ce3+ – case study of BaF2:Ce3+ single crystals

    Article • Journal of Applied Crystallography, August 2025, International Union of Crystallography

    PhD Marius Stef

  6. The Impact of Nanoparticle Coatings on the Color of Teeth Restored Using Dental Adhesives Augmented with Magnetic Nanoparticles

    Article • Medicina, July 2025, MDPI AG

    PhD Marius Stef

  7. Optical and Dielectric Properties of BaF2:(Er,Yb) Co-Doped Crystal

    Article • Materials, April 2025, MDPI AG

    PhD Marius Stef

  8. Single crystal growth by the Bridgman-Stockbarger technique of CaF2-rich - TmF3 solid solutions: Evidence of mixed valence Tm2+ and Tm3+ cations

    Article • Journal of Alloys and Compounds, January 2025, Elsevier

    PhD Marius Stef

  9. Spectroscopic Properties of TmF3-Doped CaF2 Crystals

    Article • Materials, October 2024, MDPI AG

    PhD Marius Stef

  10. An examination on the porosity of ErF3

    Article • Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms, February 2024, Elsevier

    PhD Marius Stef

  11. Spectroscopic Properties of Pb2+-Doped BaF2 Crystals

    Article • Crystals, April 2023, MDPI AG

    PhD Marius Stef

  12. Analysis of site symmetries of Er3+ doped CaF2 and BaF2 crystals by high resolution photoluminescence spectroscopy

    Article • Optical Materials, February 2023, Elsevier

    Professor Miroslav Dramicanin, PhD Marius Stef

  13. The dislocations in ErF3 doped BaF crystals

    Article • January 2023, American Institute of Physics

    PhD Marius Stef, Aleksandr Doroshkevich

  14. Effects of neutron irradiation at different fluencies on nanosized anatase titanium dioxide

    Article • Radiation Physics and Chemistry, May 2022, Elsevier

    PhD Marius Stef

  15. Luminescence Properties and Judd–Ofelt Analysis of Various ErF3 Concentration-Doped BaF2 Crystals

    Article • Materials, July 2021, MDPI AG

    PhD Marius Stef

  16. Spectroscopic properties of the gamma irradiated ErF3-DOPED BaF2 crystals

    Article • Radiation Physics and Chemistry, November 2020, Elsevier

    PhD Marius Stef

  17. Growth and characterization of ErF3 doped BaF2 crystals

    Article • Journal of Crystal Growth, October 2020, Elsevier

    PhD Marius Stef

  18. Influence of Pb2+ ions on the optical properties of gamma irradiated BaF2 crystals

    Article • Radiation Physics and Chemistry, March 2020, Elsevier

    PhD Marius Stef

  19. Spectroscopic properties of gamma irradiated CeF3 doped BaF2 crystals

    Article • January 2020, American Institute of Physics

    PhD Marius Stef

  20. Influence of growth conditions on the optical spectra of gamma irradiated BaF2 and CaF2 crystals

    Article • Journal of Crystal Growth, November 2019, Elsevier

    PhD Marius Stef

  21. Gamma-rays induced color centers in Pb2+ doped CaF2 crystals

    Article • Radiation Physics and Chemistry, December 2018, Elsevier

    PhD Marius Stef

  22. Distribution of Yb3+ and Yb2+ Ions along YbF3 -Doped BaF2 Crystals

    Article • Crystal Research and Technology, November 2018, Wiley

    PhD Marius Stef

  23. Research on Recycling Mixed Wastes Based on Fiberglass and Organic Resins

    Article • IOP Conference Series Materials Science and Engineering, June 2018, Institute of Physics Publishing

    PhD Marius Stef

  24. Experimental study of proton irradiation effect on silicon solar cells

    Article • January 2017, American Institute of Physics

    PhD Marius Stef

  25. Charge compensating defects study of YbF‐doped BaF crystals using dielectric loss

    Article • physica status solidi (b), October 2015, Wiley

    PhD Marius Stef

  26. Investigation on Crude and High-Temperature Heated Coffee Oil by ATR-FTIR Spectroscopy along with Antioxidant and Antimicrobial Properties

    Article • PLOS One, September 2015, PLOS

    PhD Marius Stef

  27. Influence of some impurities on the emission properties of CaF2:YbF3 crystals

    Article • January 2015, American Institute of Physics

    PhD Marius Stef

  28. Dielectric relaxation in ytterbium- and lead-doped calcium fluoride crystals

    Article • Zeitschrift für Physik B Condensed Matter and Quanta, April 2013, Springer Science + Business Media

    PhD Marius Stef

  29. Growth and spectroscopic characterization of Pb2+:CaF2 crystals

    Article • Zeitschrift für Physik B Condensed Matter and Quanta, August 2012, Springer Science + Business Media

    PhD Marius Stef

  30. Study of Na+ ions influence on the charge compensating defects in CaF2: YbF3 crystals using dielectric relaxation

    Article • Zeitschrift für Physik B Condensed Matter and Quanta, June 2012, Springer Science + Business Media

    PhD Marius Stef

  31. Influence of Pb[sup 2+] ions on the morphology of etch pits and dislocation density of CaF[sub 2]:YbF[sub 3] crystals

    Article • January 2012, American Institute of Physics

    PhD Marius Stef

  32. Influence of Yb3+ions on the optical properties of double-doped Er,Yb : CaF2crystals

    Article • Physica Scripta, January 2011, Institute of Physics Publishing

    PhD Marius Stef

  33. Interface Shape Studies in Bridgman Growth of Multicrystalline Silicon

    Article • January 2011, American Institute of Physics

    PhD Marius Stef

  34. Effective segregation coefficient of Er3+ions in ErF3-doped CaF2crystals

    Article • Physica Scripta, March 2010, Institute of Physics Publishing

    PhD Marius Stef

  35. Distribution of Pb2+Ions in PbF2-Doped CaF2Crystals

    Article • Acta Physica Polonica A, March 2010, Institute of Physics, Polish Academy of Sciences

    PhD Marius Stef

  36. Influence of the Er[sup 3+] Ions Concentration on the Structural Deformation in Doped CaF[sub 2] Crystals

    Article • January 2010, American Institute of Physics

    PhD Marius Stef

  37. Some dielectric and optical properties of PbF2-codoped CaF2:YbF3crystals

    Article • Physica Scripta, July 2009, Institute of Physics Publishing

    PhD Marius Stef

  38. Dielectric spectra of Li+(Na+) codoped CaF2:YbF3crystals

    Article • physica status solidi (a), April 2009, Wiley

    PhD Marius Stef

  39. Concentration dependence of the Judd–Ofelt parameters of Er3 +ions in CaF2crystals

    Article • Physica Scripta, March 2009, Institute of Physics Publishing

    PhD Marius Stef

  40. Influence of Li[sup +] and Na[sup +] Ions on the Dielectric Spectra of YbF[sub 3] Doped and LiF, NaF Codoped CaF[sub 2] Crystals

    Article • January 2009, American Institute of Physics

    PhD Marius Stef

  41. Judd-Ofelt Analysis of the Er[sup 3+] Ions in Double-Doped CaF[sub 2]:(Er[sup 3+],Yb[sup 3+]) Crystal

    Article • January 2009, American Institute of Physics

    PhD Marius Stef

  42. Luminescence Spectrum and Judd-Ofelt Analysis of CaF[sub 2]:0.83 mol% ErF[sub 3]

    Article • January 2009, American Institute of Physics

    PhD Marius Stef

  43. Segregation Coefficient of Pb[sup 2+] Ions in CaF[sub 2] Crystals

    Article • January 2009, American Institute of Physics

    PhD Marius Stef

  44. Growth of YbF3-doped CaF2 crystals and characterization of Yb3+/Yb2+ conversion

    Article • Journal of Crystal Growth, April 2008, Elsevier

    PhD Marius Stef

  45. Some dielectric and optical properties of ErF3-doped CaF2 crystals

    Article • Journal of Crystal Growth, April 2008, Elsevier

    PhD Marius Stef

  46. Influence of Various Impurities on the Optical Properties of YbF3-Doped CaF2Crystals

    Article • Acta Physica Polonica A, November 2007, Institute of Physics, Polish Academy of Sciences

    PhD Marius Stef

  47. Dielectric spectra of doped and X-ray irradiated calcium fluoride crystals

    Article • physica status solidi c, March 2007, Wiley

    PhD Marius Stef

  48. Dielectric spectrum of rare-earth-doped calcium fluoride crystals

    Article • Journal of Crystal Growth, January 2006, Elsevier

    PhD Marius Stef