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Total conductivity in Sc-doped LaTiO3 + δ perovskites

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Abstract

A series of Sc-doped lanthanum titanate perovskites, LaTi(1 − x)Sc x O3 + δ with x = 0, 0.2, 0.25 and 0.3, was prepared by sol-gel method. All compositions were found to exhibit orthorhombic crystal structure. An increase in unit cell volume was observed for composition with x = 0.2. The oxidation states of La3+, Sc3+ and Ti3+ ions have been established using X-ray photoelectron spectroscopy (XPS). It is observed that an enhancement in total conductivity of LaTiO3 + δ perovskite is achieved only at lower doping concentration. A reverse effect is observed for higher dopant concentration.

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Acknowledgments

The authors (Bradha. M and Anuradha Ashok) wish to acknowledge UGC-DAE CSR for providing financial support to carry out this research work. We acknowledge Bharathiar University, Coimbatore, for extending the facility for Ac conductivity measurements and IIT Madras for XRD measurements.

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Authors and Affiliations

  1. Nanotech Research Facility, PSG Institute of Advanced Studies, Coimbatore, T.N, 641004, India

    M. Bradha & Anuradha Ashok

  2. UGC-DAE CSR, Kalpakkam Node, Kokilamedu, T.N, 603104, India

    S. Hussain, Sujay Chakravarty & G. Amarendra

  3. Indira Gandhi Centre for Atomic Research, Kalpakkam, T.N, 603102, India

    G. Amarendra

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  1. M. Bradha
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  2. S. Hussain
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  3. Sujay Chakravarty
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  4. G. Amarendra
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  5. Anuradha Ashok
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Correspondence to Anuradha Ashok.

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Bradha, M., Hussain, S., Chakravarty, S. et al. Total conductivity in Sc-doped LaTiO3 + δ perovskites. Ionics 20, 1343–1350 (2014). https://doi.org/10.1007/s11581-014-1216-y

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  • DOI: https://doi.org/10.1007/s11581-014-1216-y

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