Phase transformation via a monoclinic phase in relaxor-based ferroelectric crystal(PbMg1/3Nb2/3 | Zendy

ChiShun Tu | Zendy; V. Hugo Schmidt | Zendy; I. Shih | Zendy; R. R. Chien | Zendy

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Phase transformation via a monoclinic phase in relaxor-based ferroelectric crystal(PbMg1/3Nb2/3

Author(s) -

ChiShun Tu,

V. Hugo Schmidt,

I. Shih,

R. R. Chien

Publication year - 2003

Publication title -

physical review. b, condensed matter

Language(s) - English

Resource type - Journals

eISSN - 1095-3795

pISSN - 0163-1829

DOI - 10.1103/physrevb.67.020102

Subject(s) - monoclinic crystal system , tetragonal crystal system , ferroelectricity , crystallography , materials science , phase (matter) , crystal (programming language) , crystal structure , type (biology) , trigonal crystal system , physics , condensed matter physics , chemistry , dielectric , computer science , quantum mechanics , geology , paleontology , optoelectronics , programming language

A monoclinic phase is evidenced between rhombohedral and cubic phases in a -cut single crystal (PbMg 1 / 3 Nb 2 / 3 O 3 ) 0 . 6 7 (PbTiO 3 ) 0 . 3 3 (PMN-33% PT) from observation of domain structures. Near 360 K the structure begins to distort from the rhombohedcal towanl the tetragonal phase through monoclinic domains (probably M A type but perhaps M B type). However, the present -cut crystal seems to disfavor the tetragonal phase and persists in the monoclinic phase up to T∼420 K, where the cubic phase begins to develop. Temperature-dependent orientations of optical indicatrices of domains indicate polarization rotations within the monoclinic planes. In addition, a prevlously electric-field-cooled process enhances a long-rangs transformation.

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