Journal
JOURNAL OF PHYSICS-CONDENSED MATTER
Volume 13, Issue 11, Pages L231-L237Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/13/11/103
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The mechanism of the ferroelectric transition in KH2PO4-type crystals has been probed using magic angle spinning P-31 NMR on single crystals. The higher resolution thus obtained has enabled us to detect a marked change in the 31P isotropic chemical shift around the transition temperature T-c, with a clear jump at T-c. These results are interpreted as evidence that the transition involves a displacive component with electronic instabilities playing a role in the driving mechanism.
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