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Structural, vibrational and microwave properties of xLa(Mg1/2Ti1/2)O3–(1 − x)Ba(Mg1/3Nb2/3)O3

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Abstract

Vibrational and microwave dielectric properties of xLa(Mg1/2Ti1/2)O3–(1−x)Ba(Mg1/3Nb2/3)O3 (x = 0.0, 0.1, 0.3, 0.5, 0.7, 0.9 and 1.0) synthesized by the solid-state reaction technique are investigated. The Rietveld refinement of the X-ray diffraction (XRD) data confirms that Ba(Mg1/3Nb2/3)O3 (x = 0.0) adopts the 1:2-ordered structure with trigonal P-3m1 space group, whereas La(Mg1/2Ti1/2)O3 (x = 1) has monoclinic P21/n crystal structure. Both the materials have single phase crystal structure. For x = 0.1, the sample is found to have double phase. Further, with the increase in the value of x, the crystal structure becomes monoclinic P21/n. The vibrational properties of the materials are studied by the Raman spectroscopy and are correlated with the structural parameters. All the materials show high dielectric constant (εr > 35) at microwave range. The factors affecting the microwave dielectric properties are discussed based on the vibrational and structural data.

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Acknowledgement

Ram Awdhesh Kumar thanks CSIR, New Delhi, for the award of NET-JRF (09/015(0486)/2015-EMR-I).

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Authors and Affiliations

  1. Department of Physics, Bose Institute, 93/1 Acharya Prafulla Chandra Road, Kolkata, 700 009, India

    Ram Awdhesh Kumar, Alo Dutta & T P Sinha

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  1. Ram Awdhesh Kumar
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  2. Alo Dutta
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Correspondence to Alo Dutta.

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Kumar, R.A., Dutta, A. & Sinha, T.P. Structural, vibrational and microwave properties of xLa(Mg1/2Ti1/2)O3–(1 − x)Ba(Mg1/3Nb2/3)O3. Bull Mater Sci 44, 36 (2021). https://doi.org/10.1007/s12034-020-02304-2

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