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Physical and Spectral Investigations of Cu2+-Doped Alkali Zinc Borate Glasses

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Abstract

Physical and spectral studies on 20ZnO + xLi2O + (30-x)Na2O + 50B2O3 (5 ≤ x ≥ 25) doped with 0.1 mol% of paramagnetic CuO impurity are carried out. Powder X-ray diffraction patterns of the glass samples confirm the amorphous nature. The physical parameters of all the glasses were also evaluated with respect to the composition. The electron paramagnetic resonance spectra of all these glasses exhibit resonance signals that are characteristic of Cu2+ ions. The optical absorption spectra also confirm the Cu2+ ion in tetragonally elongated octahedral site. Various crystal field, spin-Hamiltonian and bonding parameters are evaluated. It is observed that the mixed alkali effect is significant.

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Acknowledgments

P.S.R. thanks University Grants Commission (UGC) and the Council for Scientific and Industrial Research for financial assistance. R.V.S.S.N. thanks UGC, Government of India, New Delhi, for sanctioning the Major Research Project No. F. 37-2/2009 (SR) to carry out the present research work. T.R.R. (F.ETFAPNA024) is grateful to the UGC-SERO, Hyderabad, for permitting him to pursue a PhD program as a FDP scholar under the XI plan. P.S.R also thanks Pondicherry University and DST for providing financial assistance to attend the APES10 conference at Jeju, South Korea.

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Authors and Affiliations

  1. Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, 522 510, India

    T. Raghavendra Rao, Ch. Rama Krishna, U. S. Udayachandran Thampy, Ch. Venkata Reddy & R. V. S. S. N. Ravikumar

  2. Physical Sciences, Sri Padmavati Mahila Viswavidyalayam, Tirupati, 517 502, India

    Y. P. Reddy

  3. Department of Chemistry, Pondicherry University, Pondicherry, 605 014, India

    P. Sambasiva Rao

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  1. T. Raghavendra Rao
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  2. Ch. Rama Krishna
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  3. U. S. Udayachandran Thampy
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  6. P. Sambasiva Rao
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  7. R. V. S. S. N. Ravikumar
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Correspondence to P. Sambasiva Rao.

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Raghavendra Rao, T., Rama Krishna, C., Udayachandran Thampy, U.S. et al. Physical and Spectral Investigations of Cu2+-Doped Alkali Zinc Borate Glasses. Appl Magn Reson 40, 339–350 (2011). https://doi.org/10.1007/s00723-011-0208-6

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  • DOI: https://doi.org/10.1007/s00723-011-0208-6

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