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Title: Giant Piezoelectricity of Sm-doped Pb(Mg1/3Nb2/3)O3-PbTiO3 Single Crystals
High-performance piezoelectrics benefit transducers and sensors in a variety of electromechanical applications.The materials with the highest piezoelectric chargecoefficients (d33) are relaxor-PbTiO3 crystals, which were discovered two decades ago. We successfully grew Sm-doped Pb(Mg1/3Nb2/3)O3-PbTiO3 (Sm-PMN-PT) single crystals with even higher d33 values ranging from 3400 to 4100 picocoulombs per newton, with variation below 20%over the as-grown crystal boule, exhibiting good property uniformity. We characterized the Sm-PMN-PTon the atomic scale with scanning transmission electron microscopy and made first-principles calculations to determine that the giant piezoelectric properties arise fromthe enhanced local structural heterogeneity introduced by Sm3+ dopants. Rare-earth doping is thus identified as a general strategy for introducing local structural heterogeneity in order to enhance the piezoelectricity of relaxor ferroelectric crystals.  more » « less
Award ID(s):
1841453 1361503 1361571
PAR ID:
10130928
Author(s) / Creator(s):
Date Published:
Journal Name:
Science
Volume:
364
ISSN:
0036-8075
Page Range / eLocation ID:
264-268
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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