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dc.contributor.authorTu, Chi-Shun
dc.contributor.authorSchmidt, V. Hugo
dc.contributor.authorXue, Z.-Q.
dc.identifier.citationC.-S. Tu, V.H. Schmidt, and Z.-Q. Xue, “Hypersonic studies in CsD2AsO4 and Cs0.84(ND4)0.16D2AsO4 single crystals,” Physica B: Condensed Matter 254, 112-117 (1998).en_US
dc.description.abstractThe longitudinal (LA) Brillouin back-scattering spectra along the [1 0 0] (a-axis) phonon direction have been measured as a function of temperature (80–300 K) for both CsD2AsO4 (DCDA) and Cs0.84(ND4)0.16D2AsO4 (DCADA-0.16) single crystals. As the temperature decreases the acoustic phonon frequencies of both DCDA and DCADA-0.16 show a hardening (whose steepness is weaker in DCADA-0.16). A Landau–Khalatnikov-like maximum was observed in a pure crystal of DCDA and the polarization relaxation time is estimated to be τ∼2.0×10−11/Tc–T/s, where Tc∼206 K is the ferroelectric transition temperature. In DCADA-0.16, the temperature-dependent frequency shift shows a gradually rising anomaly associated with a damping maximum near ∼175 K. This phenomenon is attributed to coexistence of ferroelectric and paraelectric phases.en_US
dc.description.sponsorshipNSC Grant NSC87-2112-M-030-001 and NSF Grant DMR-9520251en_US
dc.titleHypersonic studies in CsD2AsO4 and Cs0.84(ND4)0.16D2AsO4 single crystalsen_US
mus.citation.journaltitlePhysica B: Condensed Matteren_US
mus.identifier.categoryPhysics & Mathematicsen_US
mus.relation.collegeCollege of Letters & Scienceen_US
mus.relation.universityMontana State University - Bozemanen_US

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