ISIS Neutron and Muon Source Data Journal

Elucidating the Mixed-Cation Effect in Na?O?K?O?TeO? Glasses for Optical Applications

Abstract: Elucidating the Mixed-Cation Effect (MCE) in tellurite glasses by systematically varying the Na O:K O ratio while maintaining TeO composition could reveal non-linear changes in both structure and optical response. The incorporation of small, high-field-strength Na cations (ionic radius 1.02 ) together with large, low-field-strength K cations (ionic radius 1.38 ) is expected to disrupt the glass network, inducing structural frustration and ionic congestion. These effects lead to anomalous or non-linear variations in Te O coordination environments, specifically [TeO ], [TeO +1], and [TeO ] units. Neutron total scattering measurements on the GEM diffractometer will be employed to resolve these coordination environments along with the local surroundings of Na and K . These results will correlate with macroscopic optical properties, including refractive index, optical band gap, Urbach energy, and third-order nonlinear susceptibility ( (3)). Understanding the MCE in tellurite glasses enables the design of high-performance photonic materials.

Principal Investigator: Dr Nur Nabihah Yusof
Experimenter: Dr Muhammad Noorazlan Bin Abd Azis
Experimenter: Dr Siddiq Sutrisno
Experimenter: Dr Faiz Mohd-Noor
Experimenter: Dr Wan Nurfadhilah Binti Zaharim
Local Contact: Dr Alex Hannon

DOI: 10.5286/ISIS.E.RB2610573

ISIS Experiment Number: RB2610573

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr Nur Nabihah Yusof et al; (2026): Elucidating the Mixed-Cation Effect in Na?O?K?O?TeO? Glasses for Optical Applications, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2610573

Data is released under the CC-BY-4.0 license.