J.G. Bednorz, H.J. Scheel
Journal of Crystal Growth
A series of twenty homogeneous Sr1-xCaxTiO3 mixed crystals has been measured dielectrically between 4.2 and 300 K. In the tetragonal phase, the dielectric constant perpendicular to the c axis becomes peaked above xc=0.0018, the quantum mechanical onset for displacive ferroelectricity. The polarization Šc can be switched between the two equivalent a axes, i.e., the system is an XY, n=2, quantum ferroelectric. Above xr=0.016±0.002, the μ(T) peaks round in a distinct manner which we attribute to the onset of a random-field-induced domain state. © 1984 The American Physical Society.
J.G. Bednorz, H.J. Scheel
Journal of Crystal Growth
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Solid State Communications
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Journal of Physics C: Solid State Physics
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