Very high commutation quality factor and dielectric tunability in nanocomposite SrTiO3 thin films with Tc enhanced to >300 °C† †Electronic supplementary information (ESI) available. See DOI: 10.1039/c7nr06991j

نویسندگان

  • Abhijeet L. Sangle
  • Oon Jew Lee
  • Ahmed Kursumovic
  • Wenrui Zhang
  • Aiping Chen
  • Haiyan Wang
  • Judith L. MacManus-Driscoll
چکیده

We report on nanoengineered SrTiO3-Sm2O3 nanocomposite thin films with the highest reported values of commutation quality factor (CQF or K-factor) of >2800 in SrTiO3 at room temperature. The films also had a large tunability of dielectric constant (49%), low tangent loss (tan δ = 0.01) and a Curie temperature for SrTiO3 > 300 °C, making them very attractive for tunable RF applications. The enhanced properties originate from the unique nanostructure in the films, with <20 nm diameter strain-controlling Sm2O3 nanocolumns embedded in a SrTiO3 matrix. Very large out-of-plane strains (up to 2.6%) and high tetragonality (c/a) (up to 1.013) were induced in the SrTiO3. The K-factor was further enhanced by adding 1 at% Sc3+ (acceptor) dopant in SrTiO3 to a value of 3300 with the tangent loss being ≤0.01 up to 1000 kV cm-1.

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Shanghai Key Laboratory of Green Chemi Chemistry and Molecular Engineering, Eas Zhongshan Road, Shanghai 200062, P. R. C Center for High Pressure Science and Tech Road, Shanghai 201203, P. R. China. E-mai State Key Laboratory of Superhard Materia Changchun, Jilin 130012, P. R. China † Electronic supplementary information bond data. CCDC 1428498. For ESI and electronic format see DOI: 10.1039/c6...

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عنوان ژورنال:

دوره 10  شماره 

صفحات  -

تاریخ انتشار 2018