Orthorhombic and monoclic ferroelectric phases investigated by Raman spectroscopy in PZN-4,5%PT and PZN-9%PT crystals article - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Solid State Communications Année : 2007

Orthorhombic and monoclic ferroelectric phases investigated by Raman spectroscopy in PZN-4,5%PT and PZN-9%PT crystals article

Résumé

Polarized Raman spectra measurements have been performed on orientated single crystals of Pb[(Zn1/3Nb2/3)0.955Ti0.045]O3 (PZN-4.5%PT) and Pb[(Zn1/3Nb2/3)0.91Ti0.09]O3 (PZN-9%PT) poled by an electric field along the pseudo-cubic direction in order to determine the nature of the induced ferroelectric phases. Under field-cooled (FC) conditions the ferrolectric phase transition sequence, tetragonal–orthorhombic–rhombohedral, was observed in PZN-4.5%PT. Comparison between the phase transitions induced in PZN-9%PT and PZN-4.5%PT crystals in FC shows that the low- temperature ferroelectric phase in PZN-9%PT cannot be orthorhombic and it can be attributed to the monoclinic phase. The characteristic temperatures found by Raman spectroscopy correspond to those obtained by dielectric measurements and by X-ray diffraction reported previously.

Dates et versions

hal-00176475 , version 1 (03-10-2007)

Identifiants

Citer

Mimoun El Marssi, H. Dammak. Orthorhombic and monoclic ferroelectric phases investigated by Raman spectroscopy in PZN-4,5%PT and PZN-9%PT crystals article. Solid State Communications, 2007, 142 (9), pp.487-491. ⟨10.1016/j.ssc.2007.04.011⟩. ⟨hal-00176475⟩
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