REScO3 Substrates—Purveyors of Strain Engineering,Crystal Research and Technology

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REScO3 Substrates—Purveyors of Strain Engineering
Crystal Research and Technology ( IF 1.5 ) Pub Date : 2019-09-18 , DOI: 10.1002/crat.201900111
Detlef Klimm ₁ , Christo Guguschev ₁ , Steffen Ganschow ₁ , Matthias Bickermann ₁ , Darrell G. Schlom _{2,

3}

Affiliation

The thermodynamic and crystallographic background for the development of substrate crystals that are suitable for the epitaxial deposition of biaxially strained functional perovskite layers is reviewed. In such strained layers the elastic energy delivers an additional contribution to the Gibbs free energy, which allows the tuning of physical properties and phase transition temperatures to desired values. For some oxide systems metastable phases can even be accessed. Rare‐earth scandates, REScO₃, are well suited as substrate crystals because they combine mechanical and chemical stability in the epitaxy process with an adjustable range of pseudo‐cubic lattice parameters in the 3.95 to 4.02 Å range. To further tune the lattice parameters, chemical substitution for the RE or Sc is possible.

中文翻译：

REScO3基材—应变工程的提供者

审查了适合于外延沉积双轴应变功能钙钛矿层的衬底晶体的发展的热力学和晶体学背景。在这样的应变层中，弹性能为吉布斯自由能提供了额外的贡献，这允许将物理性质和相变温度调节到所需值。对于某些氧化物系统，甚至可以进入亚稳相。稀土扫描日期REScO ₃非常适合用作衬底晶体，因为它们将外延过程中的机械和化学稳定性与3.95至4.02Å范围内的可调伪立方晶格参数相结合。为了进一步调整晶格参数，可以用化学方法代替RE或Sc。

更新日期：2020-02-12

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