News Column

Recent Findings from Pennsylvania State University Provides New Insights into Low Dimensional Structures [Tunable passband in one-dimensional...

July 22, 2014



Recent Findings from Pennsylvania State University Provides New Insights into Low Dimensional Structures [Tunable passband in one-dimensional phononic crystal containing a piezoelectric 0.62Pb(Mg1/3Nb2/3)O-3-0.38PbTiO(3) single crystal defect ...]

By a News Reporter-Staff News Editor at Physics Week -- Current study results on Low Dimensional Structures have been published. According to news reporting originating in University Park, Pennsylvania, by VerticalNews journalists, research stated, "Longitudinal acoustic wave propagation in one-dimensional phononic crystal containing a 0.2 mol% Fe-doped relaxor-based ferroelectric 0.62Pb(Mg1/3Nb2/3)O-3-0.38PbTiO(3) (PMN-0.38PT) single crystal defect layer is theoretically studied using the transfer matrix method. A passband can be produced in the stopband when the inserted PMN-0.38PT layer with thickness around its half wavelength."

The news reporters obtained a quote from the research from Pennsylvania State University, "The frequency of the passband is closely dependent on the PMN-PT strain coefficient, suggesting that the band structure of phononic crystal is tunable by applying external electric field onto the piezoelectric crystal. Also, we investigated the influence of acoustic impedance of periodic constitutive materials (layers A and B) on the passband, where the bandwidth of the new passband becomes narrower as the acoustic impedance ratio of layer A and B (Z(A)/Z(B)) increase."

According to the news reporters, the research concluded: "The simulated results provide valuable guidance for designing tunable acoustic filters and switches made of phononic crystal consisting of the piezoelectric defect layer."

For more information on this research see: Tunable passband in one-dimensional phononic crystal containing a piezoelectric 0.62Pb(Mg1/3Nb2/3)O-3-0.38PbTiO(3) single crystal defect layer. Physica E-Low-Dimensional Systems & Nanostructures, 2014;60():37-41. Physica E-Low-Dimensional Systems & Nanostructures can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands.

Our news correspondents report that additional information may be obtained by contacting Y.L. Wang, Pennsylvania State University, Mat Res Inst, University Park, PA 16802, United States. Additional authors for this research include W. Song, E.W. Sun, R. Zhang and W.W. Cao.

Keywords for this news article include: Pennsylvania, United States, University Park, North and Central America, Low Dimensional Structures

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


For more stories covering the world of technology, please see HispanicBusiness' Tech Channel



Source: Physics Week


Story Tools






HispanicBusiness.com Facebook Linkedin Twitter RSS Feed Email Alerts & Newsletters