Publication

Crystal structure and domain-wall contributions to the piezoelectric properties of strontium bismuth titanate ceramics

Dragan Damjanovic
1996
Journal Articles

Abstract

The piezoelectric properties of SrBi4Ti4O15 and Bi4Ti2.95Nb0.04O12 have been compared as a function of applied ac stress. Evidence of domain-wall motion was observed in Bi4Ti2.95Nb0.04O12 but not in SrBi4Ti4O15. Examination of SrBi4Ti4O15 using transmission electron microscopy revealed that the material had undergone an orthorhombic-orthorhombic, paraelectric-ferroelectric, phase transition in which no piezoelectrically active, non-180 degrees, domain walls could be created. However, for the orthorhombic-monoclinic transformation in Bi4Ti2.95Nb0.04O12 new piezoelectrically active domain walls are allowed and were considered to move under applied stress. (C) 1996 American Institute of Physics.

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https://infoscience.epfl.ch/entities/publication/d26a9e0d-ce9a-4ebb-bbbc-7f3ca2057282

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Dragan Damjanovic
1996
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/d26a9e0d-ce9a-4ebb-bbbc-7f3ca2057282

About this result

Related concepts (32)

Magnetic domain

A magnetic domain is a region within a magnetic material in which the magnetization is in a uniform direction. This means that the individual magnetic moments of the atoms are aligned with one another and they point in the same direction. When cooled below a temperature called the Curie temperature, the magnetization of a piece of ferromagnetic material spontaneously divides into many small regions called magnetic domains. The magnetization within each domain points in a uniform direction, but the magnetization of different domains may point in different directions.

Crystal structure

In crystallography, crystal structure is a description of the ordered arrangement of atoms, ions, or molecules in a crystalline material. Ordered structures occur from the intrinsic nature of the constituent particles to form symmetric patterns that repeat along the principal directions of three-dimensional space in matter. The smallest group of particles in the material that constitutes this repeating pattern is the unit cell of the structure.

Ferromagnetism

Ferromagnetism is a property of certain materials (such as iron) that results in a significant, observable magnetic permeability, and in many cases, a significant magnetic coercivity, allowing the material to form a permanent magnet. Ferromagnetic materials are familiar metals that are noticeably attracted to a magnet, a consequence of their substantial magnetic permeability. Magnetic permeability describes the induced magnetization of a material due to the presence of an external magnetic field.

Related publications (32)

Crystal structure and domain-wall contributions to the piezoelectric properties of strontium bismuth titanate ceramics

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