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Relaxor Behavior in a New Aurivillius Oxide – Bi2La0.5Sr0.5Nb1.75Sc0.25O9

✍ Scribed by Thathan Sivakumar; Mitsuru Itoh

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
376 KB
Volume
2011
Category
Article
ISSN
1434-1948

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✦ Synopsis

A new relaxor type n = 2 Aurivillius oxide material, Bi 2 La 0.5 Sr 0.5 Nb 1.75 Sc 0.25 O 9 (I), containing heterovalent A and B site cations was synthesized by standard solid-state reaction. The crystal structure of I was determined by Rietveld refinement of the powder X-ray diffraction data in the polar A2 1 am space group [a = 5.5152(5) Å, b = 5.5199(5) Å, c = 25.1982(12) Å; V = 767.12(10) Å 3 ] at room temperature. Dielectric measurements for I reveal broad dielectric maxima [a] Materials and Structures Laboratory,

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The (alpha =3, beta =2) member of the (A3ABO6) (A3B3O9) homologous series has been stabilised in the Sr-Rh-O system for a [Sr10(Sr0.5Rh1.5)TP(Rh6)Oh]O24 composition. The structural characterisation has been performed by powder X-ray and electron diffraction measurements and high-resolution electron