| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Surface Acoustic Wave Propagation in Relaxor-Based Ferroelectric Single Crystals 0.93Pb(Zn1/3Nb2/3)O3−0.07PbTiO3 Poled along [011]c |
| LI Xiu-Ming1,2, ZHANG Rui1,2**, HUANG Nai-Xing1, LÜ Tian-Quan1, CAO Wen-Wu1,3 |
1Condensed Matter Science and Technology Institute, Department of Physics, Harbin Institute of Technology, Harbin 150080
2Physical and Electrical Information Engineering Institute, Daqing Normal University, Daqing 163712
3Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania, 16802, USA
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| Cite this article: |
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ZHANG Rui, LI Xiu-Ming, LÜ Tian-Quan et al 2012 Chin. Phys. Lett. 29 024302 |
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Abstract Surface acoustic wave (SAW) propagation in relaxor-based ferroelectric single crystals 0.93Pb(Zn1/3Nb2/3)O3−0.07PbTiO3 (PZN−7%PT ) poled along [011]c has been analyzed theoretically. The results show that PZN−7%PT single crystals have excellent SAW properties, such as low phase velocities, very high electromechanical coupling coefficients and small power flow angles. It is also found that the SAW properties strongly depend on the propagation direction and the characteristic curves of SAW phase velocity, and the electromechanical coupling coefficients are symmetric with respect to θ=90°. Considering all related factors, the X−cut PZN-7%PT single crystal has the best performance. Based on our results, the X−cut PZN-7%PT single crystals poled along [011]c are an excellent candidate for ultra-wide bandwidth low-frequency SAW devices.
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| Keywords:
43.35.Pt
68.35.Iv
77.65.-j
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Received: 24 September 2011
Published: 11 March 2012
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| PACS: |
43.35.Pt
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(Surface waves in solids and liquids)
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68.35.Iv
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(Acoustical properties)
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77.65.-j
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(Piezoelectricity and electromechanical effects)
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