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| Home > Publications database > Possible Piezoelectric Materials $CsMZr_{0.5}(MoO_{4})_{3}$ ( M = Al, Sc, V, Cr, Fe, Ga, In) and $CsCrTi_{0.5}(MoO_{4})_{3}$: Structure and Physical Properties |
| Home > Publications database > Possible Piezoelectric Materials $CsMZr_{0.5}(MoO_{4})_{3}$ ( M = Al, Sc, V, Cr, Fe, Ga, In) and $CsCrTi_{0.5}(MoO_{4})_{3}$: Structure and Physical Properties |
| Journal Article | DESY-2014-02330 |
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2014
Soc.
Washington, DC
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Please use a persistent id in citations: doi:10.1021/jp4077245
Abstract: A series of isostructural trigonal molybdates CsMZr0.5(MoO4)(3) with M = Al, Ga, In, Sc, Cr, V, Fe, and CsCrTi0.5(MoO4)(3) was synthesized by solid state reactions and characterized by synchrotron powder diffraction, differential scanning calorimetry, thermal conductivity measurements, and magnetization measurements for compounds with a magnetic 3d transition metal cation. The NASICON-type structure of these compounds represents a three-dimensional framework of corner-sharing trigonal MoO4-pyramids and MO6-octahedra, in which M and Zr (Ti) ions are randomly distributed. The Cs ions occupy large channels along the c-axis. A combination of phenomena like a drastic increase of thermal conductivity, endothermic signals in the DSC curve and anomalies in the thermal expansion coefficients, observed for the compounds with M = Cr, V, Fe, and CsCrTi0.3(MoO4)(3) above 700 K, allows one to propose a structural phase transition. The crystal structure of the high-temperature phase is very close to the low-temperature one. A significant hysteresis in high-temperature electronic and thermal conductivity was observed. A possible transition from the piezoelectric to the paraelectric state is discussed.
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