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Preparation and characterization of chemically derived (Pb,La)TiO/sub 3/ thin films

机译:化学衍生(Pb,La)TiO / sub 3 /薄膜的制备与表征

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Ferroelectric lead lanthanum titanate (PLT) thin films with composition varying from pure PbTiO/sub 3/ to PLT 25/100 (0 to 25 mol.% La) were prepared by spin-casting 0.25M solutions containing metallo-organic precursors of Pb, La, and Ti. The dielectric and ferroelectric properties of the thin (410-nm) films were characterized. The dielectric constants of the films varied from approximately 80 to approximately 690 for La contents varying from 0 to 25 mol%, respectively. Dissipation factors varied from approximately 0.03 to approximately 0.09 over the same compositional range. The temperature dependence of the dielectric properties was also studied to determine the effects of La content on the Curie point (T/sub c/). As expected, T/sub c/ was found to decrease with increasing La concentration. Coercive field and remanent polarization also decreased with increased La concentration.
机译:通过旋铸0.25M含Pb金属有机前体的溶液制备铁电钛酸镧铅(PLT)薄膜,其成分从纯PbTiO / sub 3 /到PLT 25/100(0至25 mol。%La)不等。 La和Ti。表征了薄膜(410-nm)的介电和铁电特性。对于La含量从0至25mol%变化,膜的介电常数从约80至约690变化。在相同的组成范围内,耗散因数从约0.03到约0.09不等。还研究了介电性能的温度依赖性,以确定La含量对居里点(T / sub c /)的影响。如预期的那样,发现T / sub c /随着La浓度的增加而降低。矫顽场和剩余极化也随着La浓度的增加而降低。

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