Journal Home > Volume 10 , issue 5

The polycrystalline strontium ferrate titanate (SrFe0.1Ti0.9O3, SFTO) thin films have been successfully prepared by chemical solution method. By analyzing the current-voltage (I-V) characteristics, we discuss the conduction mechanism of SFTO. It is found that the number of oxygen vacancy defects is increased by Fe ion doping, making SFTO be with better resistive switching property. Fe ion doping can also enhance the absorption of strontium titanate to be exposed to visible light, which is associated with the change of energy band. The band gap width (2.84 eV) of SFTO films is figured out, which is less than that of pure strontium titanate. Due to more oxygen vacancy defects caused by Fe ion doping, the band gap width of strontium titanate was reduced slightly. The defect types of SFTO thin films can be determined by electron paramagnetic resonance spectroscopy. In addition, we analyzed the energy band and state density of SFTO by first-principles calculation based on density functional theory, and found that Fe ion doping can reduce the band gap width of strontium titanate with micro-regulation on the band structure. A chemical state of SFTO was analyzed by X-ray photo electron spectroscopy. At the same time, the structure and morphology of SFTO were characterized by X-ray diffraction and scanning electron microscope. This study deepens further understanding of the influence of Fe ion doping on the structure and properties of strontium ferrate titanate, which is expected to be a functional thin film material for memristor devices.


menu
Abstract
Full text
Outline
Electronic supplementary material
About this article

Resistive switching and optical properties of strontium ferrate titanate thin film prepared via chemical solution deposition

Show Author's information Jun LIXingui TANG( )Qiuxiang LIUYanping JIANGZhenxun TANG
School of Physics and Optoelectric Engineering, Guangdong University of Technology, Guangzhou 510006, China

Abstract

The polycrystalline strontium ferrate titanate (SrFe0.1Ti0.9O3, SFTO) thin films have been successfully prepared by chemical solution method. By analyzing the current-voltage (I-V) characteristics, we discuss the conduction mechanism of SFTO. It is found that the number of oxygen vacancy defects is increased by Fe ion doping, making SFTO be with better resistive switching property. Fe ion doping can also enhance the absorption of strontium titanate to be exposed to visible light, which is associated with the change of energy band. The band gap width (2.84 eV) of SFTO films is figured out, which is less than that of pure strontium titanate. Due to more oxygen vacancy defects caused by Fe ion doping, the band gap width of strontium titanate was reduced slightly. The defect types of SFTO thin films can be determined by electron paramagnetic resonance spectroscopy. In addition, we analyzed the energy band and state density of SFTO by first-principles calculation based on density functional theory, and found that Fe ion doping can reduce the band gap width of strontium titanate with micro-regulation on the band structure. A chemical state of SFTO was analyzed by X-ray photo electron spectroscopy. At the same time, the structure and morphology of SFTO were characterized by X-ray diffraction and scanning electron microscope. This study deepens further understanding of the influence of Fe ion doping on the structure and properties of strontium ferrate titanate, which is expected to be a functional thin film material for memristor devices.

Keywords:

SrTiO3, thin films, resistive switching, oxygen vacancy, first principles
Received: 17 September 2020 Revised: 10 April 2021 Accepted: 12 April 2021 Published: 20 September 2021 Issue date: October 2021
References(38)
[1]
Cho S, Jang JW, Zhang WR, et al. Single-crystalline thin films for studying intrinsic properties of BiFeO3-SrTiO3 solid solution photoelectrodes in solar energy conversion. Chem Mater 2015, 27: 6635-6641.
[2]
Janousch M, Meijer GI, Staub U, et al. Role of oxygen vacancies in Cr-doped SrTiO3 for resistance-change memory. Adv Mater 2007, 19: 2232-2235.
[3]
Menesklou W, Schreiner HJ, Härdtl KH, et al. High temperature oxygen sensors based on doped SrTiO3. Sens Actuat B: Chem 1999, 59: 184-189.
[4]
Kawasaki S, Nakatsuji K, Yoshinobu J, et al. Epitaxial Rh-doped SrTiO3 thin film photocathode for water splitting under visible light irradiation. Appl Phys Lett 2012, 101: 033910.
[5]
Wang L, Merkle R, Mastrikov YA, et al. Oxygen exchange kinetics on solid oxide fuel cell cathode materials—General trends and their mechanistic interpretation. J Mater Res 2012, 27: 2000-2008.
[6]
Alexandrov VE, Maier J, Evarestov RA. Ab initio study of SrFexTi1-xO3: Jahn-Teller distortion and electronic structure. Phys Rev B 2008, 77: 075111.
[7]
Higuchi T, Tsukamoto T, Sata N, et al. Electronic structure of p-type SrTiO3 by photoemission spectroscopy. Phys Rev B 1998, 57: 6978-6983.
[8]
Sarin N, Mishra M, Gupta G, et al. Deciphering the role of oxygen vacancies on structural, electrical, and magnetic properties of Fe-substituted strontium titanate. Phys Status Solidi B 2018, 255: 1700683.
[9]
Berney RL, Cowan DL. Photochromism of three photosensitive Fe centers in SrTiO3. Phys Rev B 1981, 23: 37-50.
[10]
Merkle R, Maier J. Oxygen incorporation into Fe-doped SrTiO3: Mechanistic interpretation of the surface reaction. Phys Chem Chem Phys 2002, 4: 4140-4148.
[11]
Rothschild A, Litzelman SJ, Tuller HL, et al. Temperature- independent resistive oxygen sensors based on SrTi1-xFexO3-δ solid solutions. Sens Actuat B: Chem 2005, 108: 223-230.
[12]
Evarestov R, Blokhin E, Gryaznov D, et al. Jahn-Teller effect in the phonon properties of defective SrTiO3 from first principles. Phys Rev B 2012, 85: 174303.
[13]
Ang C, Yu Z, Jing Z, et al. Dielectric spectra and electrical conduction in Fe-doped SrTiO3. Phys Rev B 2000, 61: 3922-3926.
[14]
Muenstermann R, Menke T, Dittmann R, et al. Coexistence of filamentary and homogeneous resistive switching in Fe-doped SrTiO3 thin-film memristive devices. Adv Mater 2010, 22: 4819-4822.
[15]
Rothschild A, Menesklou W, Tuller HL, et al. Electronic structure, defect chemistry, and transport properties of SrTi1-xFexO3-y solid solutions. Chem Mater 2006, 18: 3651-3659.
[16]
Steinsvik S, Bugge R, Gjønnes J, et al. The defect structufe OF SrTi1-xFexO3-y (x = 0-0.8) investigated by electrical conductivity measurements and electron energy loss spectroscopy (EELS). J Phys Chem Solids 1997, 58: 969-976.
[17]
Vračar M, Kuzmin A, Merkle R, et al. Jahn-Teller distortion around Fe4+ in Sr(FexTi1-x)O3-δ from X-ray absorption spectroscopy, X-ray diffraction, and vibrational spectroscopy. Phys Rev B 2007, 76: 174107.
[18]
Rodewald S, Fleig J, Maier J. Microcontact impedance spectroscopy at single grain boundaries in Fe-doped SrTiO3 polycrystals. J Am Ceram Soc 2001, 84: 521-530.
[19]
Sundell PG, Björketun ME, Wahnström G. Thermodynamics of doping and vacancy formation in BaZrO3 perovskite oxide from density functional calculations. Phys Rev B 2006, 73: 104112.
[20]
Johnson KD, Dravid VP. Static and dynamic electron holography of electrically active grain boundaries in SrTiO3. Interface Sci 2000, 8: 189-198.
[21]
Wang YG, Tang XG, Liu QX, et al. Ferroelectric and ferromagnetic properties of SrTi0.9Fe0.1O3-δ thin films. Solid State Commun 2015, 202: 24-27.
[22]
Baker JN, Bowes PC, Long DM, et al. Defect mechanisms of coloration in Fe-doped SrTiO3 from first principles. Appl Phys Lett 2017, 110: 122903.
[23]
Neaton JB, Ederer C, Waghmare UV, et al. First-principles study of spontaneous polarization in multiferroic BiFeO3. Phys Rev B 2005, 71: 014113.
[24]
Hosokura T, Iwaji N, Nakagawa T, et al. (100)-oriented SrTiO3/BaTiO3 artificial superlattices fabricated by chemical solution deposition. Cryst Growth Des 2011, 11: 4253-4256.
[25]
Carter E, Carley AF, Murphy DM. Evidence for O2- radical stabilization at surface oxygen vacancies on polycrystalline TiO2. J Phys Chem C 2007, 111: 10630-10638.
[26]
Caretti I, Keulemans M, Verbruggen SW, et al. Light-induced processes in plasmonic gold/TiO2 photocatalysts studied by electron paramagnetic resonance. Top Catal 2015, 58: 776-782.
[27]
Huang MH, Xia JY, Xi YM, et al. Study on photochromism in SrTiO3:Fe ceramic powder. J Eur Ceram Soc 1997, 17: 1761-1765.
[28]
Ehre D, Cohen H, Lyahovitskaya V, et al. X-ray photoelectron spectroscopy of amorphous and quasiamorphous phases of BaTiO3 and SrTiO3. Phys Rev B 2008, 77: 184106.
[29]
Yamashita T, Hayes P. Analysis of XPS spectra of Fe2+ and Fe3+ ions in oxide materials. Appl Surf Sci 2008, 254: 2441-2449.
[30]
Perry NH, Kim N, Ertekin E, et al. Origins and control of optical absorption in a nondilute oxide solid solution: Sr(Ti, Fe)O3-x perovskite case study. Chem Mater 2019, 31: 1030-1041.
[31]
Cooper D, Baeumer C, Bernier N, et al. Anomalous resistance hysteresis in oxide ReRAM: Oxygen evolution and reincorporation revealed by in situ TEM. Adv Mater 2017, 29: 1700212.
[32]
Merino NA, Barbero BP, Eloy P, et al. La1-xCaxCoO3 perovskite-type oxides: Identification of the surface oxygen species by XPS. Appl Surf Sci 2006, 253: 1489-1493.
[33]
Ghaffari M, Liu T, Huang H, et al. Investigation of local structure effect and X-ray absorption characteristics (EXAFS) of Fe (Ti) K-edge on photocatalyst properties of SrTi(1-x)FexO(3-δ). Mater Chem Phys 2012, 136: 347-357.
[34]
Rana A, Lu HD, Bogle K, et al. Scaling behavior of resistive switching in epitaxial bismuth ferrite heterostructures. Adv Funct Mater 2014, 24: 3962-3969.
[35]
Ghaffari M, Shannon M, Hui H, et al. Preparation, surface state and band structure studies of SrTi(1-x)Fe(x)O(3-δ) (x = 0-1) perovskite-type nano structure by X-ray and ultraviolet photoelectron spectroscopy. Surf Sci 2012, 606: 670-677.
[36]
Sahner K, Schönauer D, Moos R, et al. Effect of electrodes and zeolite cover layer on hydrocarbon sensing with p-type perovskite SrTi0.8Fe0.2O3-δ thick and thin films. J Mater Sci 2006, 41: 5828-5835.
[37]
Bocquet, Fujimori, Mizokawa, et al. Electronic structure of SrFe4+O3 and related Fe perovskite oxides. Phys Rev B Condens Matter 1992, 45: 1561-1570.
[38]
Du HC, Jia CL, Mayer J, et al. Atomic structure of antiphase nanodomains in Fe-doped SrTiO3 films. Adv Funct Mater 2015, 25: 6369-6373.
File
40145_2021_483_MOESM1_ESM.pdf (134.9 KB)
Publication history
Copyright
Acknowledgements
Rights and permissions

Publication history

Received: 17 September 2020
Revised: 10 April 2021
Accepted: 12 April 2021
Published: 20 September 2021
Issue date: October 2021

Copyright

© The Author(s) 2021

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant No. 11574057), the Guangdong Basic and Applied Basic Research Foundation (Grant No. 2021A1515012607), and the Science and Technology Program of Guangdong Province of China (Grant No. 2017A010104022).

Rights and permissions

This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made.

The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.

To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

Reprints and Permission requests may be sought directly from editorial office.

Return