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Opportunity at National Institute of Standards and Technology (NIST)

Structure and Dynamics of Ferroelectric and Relaxor Materials Studied with Neutron Scattering

Location

NIST Center for Neutron Research

RO# Location
50.61.01.B8035 Gaithersburg, MD

Please note: This Agency only participates in the February and August reviews.

Advisers

Name E-mail Phone
Gehring, Peter M. peter.gehring@nist.gov 301 975-3946

Description

Advanced neutron scattering methods are being used to measure the structure and lattice dynamics of a wide variety of ferroelectric and relaxor ferroelectric materials. Current interest focuses on the lead-free perovskites NBT, KLT, and KTN in addition to the lead-based perovskites PZT, PMN-xPT, and PZN-xPT, which exhibit exceptional piezoelectric properties. The nature of the static diffuse scattering arising from short-range polar correlations in relaxor systems is a topic of special interest. The effect of an applied electric field on the structural phase transitions and the diffuse scattering is also being studied to clarify the as-yet unknown polar nanostructure in these materials.

 

Keywords:
Ferroelectrics; Relaxors; Morphotropic phase boundary; Diffuse scattering; Lattice dynamics; Soft modes; Neutron scattering; Polar nanoregions;

Eligibility

Citizenship:  Open to U.S. citizens
Level:  Open to Postdoctoral applicants
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