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dc.contributor.authorTu, Chi-Shun
dc.contributor.authorChien, R.-M.
dc.contributor.authorSchmidt, V. Hugo
dc.date.accessioned2016-04-15T20:24:50Z
dc.date.available2016-04-15T20:24:50Z
dc.date.issued1997-02-01
dc.identifier.citationC.-S. Tu, R.-M. Chien, and V.H. Schmidt, “Temperature and concentration dependences of Raman vibrational modes in Rb1-x(ND4)xD2AsO4 mixed crystals,” Phys. Rev. B 55, 2920-2924 (1997).en_US
dc.identifier.issn1098-0121
dc.identifier.urihttps://scholarworks.montana.edu/xmlui/handle/1/9698
dc.description.abstractThe Raman vibrations (10–103 cm−1) of A1, B2, and E symmetries along the [110] phonon direction have been measured as a function of temperature (80–293 K) in the mixed ferroelectric (FE) antiferroelectric system Rb1−x(ND4)xD2AsO4 (DRADA-x) for ammonium concentrations x=0, 0.10, and 0.28. With decreasing temperature, the B2 Raman shifts of RbD2AsO4 show both softening and hardening anomalies for four selected modes. In DRADA-0.10, the bending mode ν2(B2) (near 280 cm−1) of the AsO4 group exhibits a gradual softening down to T∼125 K and then has a rapid drop. This phenomenon is attributed to a quick development of long-range FE ordering. In DRADA-0.28, the in-plane bending mode δ(O-D) (B2) shows a softening near 220 K, whereas the bending mode ν2(B2) of the AsO4 group exhibits a hardening. We associate these anomalies with the onset of glass formation. A doublet with splitting of about 10 cm−1 was observed in the ν1 modes and was attributed to a slight deformation of the ν1 vibration due to AsO4 groups having different nearby ions (ND4 and Rb).en_US
dc.titleTemperature and concentration dependences of Raman vibrational modes in Rb1-x(ND4)xD2AsO4 mixed crystalsen_US
dc.typeArticleen_US
mus.citation.extentfirstpage2920en_US
mus.citation.extentlastpage2924en_US
mus.citation.issue5en_US
mus.citation.journaltitlePhysical Review Ben_US
mus.citation.volume55en_US
mus.identifier.categoryChemical & Material Sciencesen_US
mus.identifier.categoryPhysics & Mathematicsen_US
mus.identifier.doi10.1103/PhysRevB.55.2920en_US
mus.relation.collegeCollege of Letters & Scienceen_US
mus.relation.departmentPhysics.en_US
mus.relation.universityMontana State University - Bozemanen_US
mus.data.thumbpage3en_US


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