Abstract
Dielectric properties of (1−x)Pb(In1/2Nb1/2)O3−xPbZrO3(Zr-PIN) and (1−x)Pb(In1/2Nb1/2) O3−xPb(Yb1/2Nb1/2)O3(Yb-PIN) mixed crystal systems were investigated under hydrostatic pressures up to 0.7 GPa. There are striking pressure effects in these systems. In Zr-PIN (x=0.1) the temperature Tm, indicating the maximum of the dielectric constant, εrm′, decreases at the rate of dTm/dp|p=0=−54 °C/GPa, and the εrm′ decreases with increasing pressure, while in Zr-PIN (x=0.34) the Tm decreases at the rate of dTm/dp|p=0=−100 °C/GPa, and the εrm′ decreases and the maximum value of the tan δ, denoted as tan δm, increases with increasing pressure. For Yb-PIN (x=0.16) the Tm increases at the rate of dTm/dp=155 °C/GPa, both the εrm′ and the tan δm decrease with increasing pressure.
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