Y. Tajitsu

Publications102
h-index17
Citations1,297
Highly Influential Citations14
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Ferroelectric Behavior in the Copolymer of Vinylidenefluoride and Trifluoroethylene
The linear and nonlinear dielectrical and depolarization processes of the copolymer of vinylidene fluoride and trifluoroethylene have been measured. The D vs. E hysteresis loop below room temperature… Expand
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Ferroelectric phase transition in a copolymer of vinylidene fluoride and trifluoroethylene
Abstract The phase transition in a copolymer of 55% vinylidene fluoride and 45% trifluoroethylene near 70°C has been investigated by measuring the temperature dependence of fundamental properties.… Expand
  • 158
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Film Sensor Device Fabricated by a Piezoelectric Poly(L-lactic acid) Film
Synthetic piezoelectric polymer films produced from petroleum feedstock have long been used as thin-film sensors and actuators. However, the fossil fuel requirements for synthetic polymer production… Expand
  • 43
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Piezoelectric Motion of Multilayer Film with Alternate Rows of Optical Isomers of Chiral Polymer Film
We realized a multilayer film laminated alternately with poly(L-lactic acid) (PLLA) and poly(D-lactic acid) (PDLA) films in order to improve the piezoelectric performance of the PLLA film. In the… Expand
  • 13
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High piezoelectric performance of poly(lactic acid) film manufactured by solid-state extrusion
Recently, the application of uniaxially stretched poly(l-lactic acid) (PLLA) films to speakers, actuators, and pressure sensors has been attempted, taking advantage of their piezoelectric… Expand
  • 32
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New design of actuator using shear piezoelectricity of a chiral polymer, and prototype device
Chiral polymers have been known to exhibit small shear piezoelectricity for about fifty years. However, recently, we reported that poly(L-lactic acid) treated with supercritical carbon dioxide… Expand
  • 24
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Dielectric properties of biodegradable polylactic acid and starch ester
In order to examine the applicability of biodegradable polymers to the fields of electrical insulation, several dielectric properties of two typical biodegradable polymers, polylactic acid (PLA) and… Expand
  • 20
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Elasticity Control of Piezoelectric Lead Zirconate Titanate (PZT) Materials Using Negative-Capacitance Circuits
A piezoelectric material was inserted in an elastic wave vibration transmission system to improve sound insulation. The apparent elasticity of the inserted piezoelectric material was controlled using… Expand
  • 22
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Fundamental Study of Application of Piezoelectric Chiral Polymer to Actuator
To realize a new piezoelectric chiral polymer actuator, we studied the motion induced by the shear piezoelectricity of a poly(L-lactic acid) (PLLA) film under the application of an ac voltage. First,… Expand
  • 13
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Effects of glass transition on the dielectric breakdown and electrical conduction in several biodegradable polymers
Results of the conductivity and breakdown strength measured for several biodegradable polymers are reported. At room temperature, poly-L-lactic acid (PLLA) and polyethylene terephthalate succinate… Expand
  • 14
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