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Article Dans Une Revue Ferroelectrics Année : 2007

Is K(1-x)LixTa03 a real relaxor ?

Résumé

Li-doped KTaO3, K(1-x)Li x TaO3 (KTL) has been reported to be a relaxor with an isovalent substitution of Li+ for K+. For confirming the idea, we performed second-harmonic generation microscopic observations, X-ray diffraction experiments and dielectric measurements of KTL with the critical concentration of Li (x = 3%). These reveal that an intermediate phase exists between 2 characteristic temperatures, Td and Tp. The former corresponds to an elastic change accompanying small deformation and the latter to a dipolar change of the crystal. It is highly probable that the polar-nano regions appear below Td and transformed into ferroelectric domains at Tp. The present experiments support that KTL is a real relaxor.
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Dates et versions

hal-00176448 , version 1 (03-10-2007)

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Y. Uesu, H. Yokota, Jean-Michel Kiat, C. Malibert (c). Is K(1-x)LixTa03 a real relaxor ?. Ferroelectrics, 2007, 347, pp.37-43. ⟨10.1080/00150190601186981⟩. ⟨hal-00176448⟩
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