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首页> 外文会议>Symposium on Epitaxial Oxide Thin Films III March 31-April 2, 1997, San Francisco, California,U.S.A >Pulsed laser deposition of (Sr_1-xCa_x)RuO_3 and Sr(Ru_1-xTi_x)O_3 thin films by sequential multilayer process
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Pulsed laser deposition of (Sr_1-xCa_x)RuO_3 and Sr(Ru_1-xTi_x)O_3 thin films by sequential multilayer process

机译：通过顺序多层工艺对（Sr_1-xCa_x）RuO_3和Sr（Ru_1-xTi_x）O_3薄膜进行脉冲激光沉积

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摘要

We report on the growth and properties of (Sr_1-xCa_x)RuO_3 and Sr(Ru_1-xTi_x)O_3 thin films obtained by pulsed laser deposition. A sequential deposition of sub-monolayers from SrTiO_3 and CaRuO_3 end members has been successfully used to substitute Ca- and Ti- in the SrRuO_3 perovskite structure. Magnetization measuremdents as well as transport properties exhibit very different behaivor for each type of substitution. In the case of Ca- substituted smaples, the resistivity remains metallic and is consistent with the expected behavior for intermediate compositions. A progressive reduction of the Curie temperature with higher doping is reported. In the case of Ti- substituted samples, we observe a stronger reduction of the Curie temperature and remanent magnetization with increasing Ti substitution. Resistivity as a function of temperature shows a crossover from metallic to semiconducting behavior with variable range hopping process for a high level of Ti doping and pints out the clear differences between the two substitutions sites. In both cases, the observed reduction of the magnetization with increasing doping concentration can be well described by assuming a random distribution of substituted sites in the perovskite structure.
机译：我们报告了通过脉冲激光沉积获得的（Sr_1-xCa_x）RuO_3和Sr（Ru_1-xTi_x）O_3薄膜的生长和特性。从SrTiO_3和CaRuO_3末端成员连续沉积亚单层膜已成功用于替代SrRuO_3钙钛矿结构中的Ca-和Ti-。每种替代类型的磁化量以及传输性能表现出截然不同的行为。在Ca取代的枫木的情况下，电阻率保持金属性，并且与中间组合物的预期行为一致。据报道，随着掺杂的增加，居里温度逐渐降低。对于钛取代的样品，我们观察到居里温度的降低更强，并且随着钛取代的增加，剩余的磁化强度。电阻率随温度的变化表现出从金属行为到半导体行为的转变，其中对于高水平的Ti掺杂具有可变的跳变过程，并指出了两个置换位点之间的明显差异。在两种情况下，通过假设钙钛矿结构中取代位点的随机分布，可以很好地描述随掺杂浓度增加而观察到的磁化强度降低。

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