Very high commutation quality factor and dielectric tunability in nanocomposite SrTiO3 thin films with Tc enhanced to >300 °C

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

doi:10.1039/C7NR06991J

Very high commutation quality factor and dielectric tunability in nanocomposite SrTiO₃ thin films with T_c enhanced to >300 °C†

Abhijeet L. Sangle,

*^a Oon Jew Lee,^b Ahmed Kursumovic,^a Wenrui Zhang,

^c Aiping Chen,^d Haiyan Wang

^e and Judith L. MacManus-Driscoll*^a

Author affiliations

* Corresponding authors

^a Department of Materials Science and Metallurgy, University of Cambridge, UK
E-mail: sangle.abhijeet@gmail.com, jld35@cam.ac.uk

^b School of Fundamental Science, Universiti Malaysia Terengganu, 21300 Kuala Terengganu, Malaysia

^c Center for Functional Nanomaterials, Brookhaven National Laboratory, Bldg. 735 – P.O. Box 5000, Upton, NY, USA

^d Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory, Los Alamos, NM 87545, USA

^e School of Materials Engineering, Purdue University, West Lafayette, IN, USA

Abstract

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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Article information

DOI: https://doi.org/10.1039/C7NR06991J
Article type: Paper
Submitted: 19 Sep 2017
Accepted: 10 Nov 2017
First published: 05 Feb 2018
This article is Open Access

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Nanoscale, 2018,10, 3460-3468

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Very high commutation quality factor and dielectric tunability in nanocomposite SrTiO₃ thin films with T_c enhanced to >300 °C

A. L. Sangle, O. J. Lee, A. Kursumovic, W. Zhang, A. Chen, H. Wang and J. L. MacManus-Driscoll, Nanoscale, 2018, 10, 3460 DOI: 10.1039/C7NR06991J

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

Nanoscale

Very high commutation quality factor and dielectric tunability in nanocomposite SrTiO₃ thin films with T_c enhanced to >300 °C†

Abstract

Supplementary files

Article information

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Very high commutation quality factor and dielectric tunability in nanocomposite SrTiO₃ thin films with T_c enhanced to >300 °C

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