Trivalent Dopant Size Influences Electrostrictive Strain in Ceria Solid Solutions
Source abstract
Abstract
-fold larger than expected for classical (Newnham) electrostrictors. However, electrostrictive strain in Er-, Gd-, Sm-, and Nd-doped ceramics exhibited marked frequency relaxation, with the Debye-type characteristic relaxation time τ ≤ 1 s, while for the smallest dopants-Lu and Yb-little change in electrostrictive strain was detected over the complete frequency range studied. We find that only the small, less-studied dopants continue to produce useable electrostrictive strain at the higher frequencies. We suggest that this striking difference in frequency response may be explained by postulating that introduction of a dopant induces two types of polarizable elastic dipoles and that the dopant size determines which of the two will be dominant.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Advancements in Solid Oxide Fuel Cells · Electronic and Structural Properties of Oxides
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Molecular Chemistry and Materials Science, Weizmann Institute of Science, Rehovot 7610001, Israel
Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611, United States
Department of Materials Science and Engineering, University of California, Davis, Davis, California 95616, United States
Dept. Chemical Research Support, Weizmann Institute of Science, Rehovot 7610001, Israel
Funding
United States - Israel Binational Agricultural Research and Development Fund · H2020 Future and Emerging Technologies · Estate of Olga Klein ? Astrachan fund
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