Investigation of electronic, ferroelectric and local electrical conduction behavior of RF sputtered BiFeO3 thin films
Source abstract
Abstract
Abstract Most of the applied research on BiFeO3 (BFO) focuses on magnetoelectric and spintronic applications. This calls for a detailed grasp of multiferroic and conduction properties. BFO thin films with (100) epitaxial growth has been deposited on a LaNiO3 (LNO) buffered Pt/Ti/SiO2/Si(100) substrate using RF magnetron sputtering. The film formed at 15 mTorr, 570 °C, and with Ar/O2 4:1 had a reasonably high degree of (100)-preferential orientation, the least surface roughness, and a densely packed structure. We obtained ferroelectric loops with strong polarization (150 μC cm−2). The leakage current density is as low as 10–2 A cm−2 at 100 kV cm−1, implying that space-charge-limited bulk conduction (SCLC) was the primary conduction channel for carriers within BFO films. Local electrical conduction behavior demonstrates that at lower voltages, the grain boundary dominates electrical conduction and is linked to the displacement of oxygen vacancies in the grain boundary under external electric fields. We hope that a deeper understanding of the conduction mechanism will help integrate BFO into viable technologies.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Multiferroics and related materials · Ferroelectric and Piezoelectric Materials · Dielectric properties of ceramics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (46)
Show source-provided references
1. Recent advances in multiferroic oxide heterostructures and devices10.1039/C5TC03008K ↗
2. Thickness dependent magnetic and ferroelectric properties of LaNiO3 buffered BiFeO3 thin films10.1016/j.cap.2014.12.012 ↗
3. Physics and applications of bismuth ferrite10.1002/adma.200802849 ↗
4. Thermodynamics of multiferroic BiFeO3: applications for the deposition of BiFeO3 thin films10.1063/1.3573809 ↗
5. Nonstoichiometry, structure, and properties of BiFeO3 films10.1021/acs.chemmater.6b02542 ↗
6. Size and lone pair effects on the multiferroic properties of Bi0.75A0.25FeO3−δ (A = Sr, Pb, and Ba) Ceramics10.1111/jace.12458 ↗
7. Strain driven structural phase transformation and correlation between structural, electronic, and magnetic properties of Bi1−x Ba x FeO3 (0 ≤ x ≤ 0.30) system10.1016/j.jallcom.2017.01.130 ↗
8. Correlation between structure, oxygen content and the multiferroic properties of Sr doped BiFeO310.1016/j.jallcom.2014.10.029 ↗
9. Anomalous temperature dependence of magnetic coercivity and structure property correlations in Bi.75A0.25FeO3 (A = Sr, Pb, and Ba) system
10. Optical properties of epitaxial BiFeO3 thin film grown on SrRuO3-buffered SrTiO3 substrate10.1186/1556-276X-9-188 ↗
11. Chemically driven carbon-nanotube-guided thermopower waves10.1038/nmat2714 ↗
12. Oxygen concentration and its effect on the leakage current in BiFeO3 thin films
13. Local conductivity and the role of vacancies around twin walls of (001)−BiFeO3 thin films10.1063/1.4746073 ↗
14. Conduction at domain walls in oxide multiferroics10.1038/nmat2373 ↗
15. Multiferroic BiFeO3 thin films deposited on SrRuO3 buffer layer by rf sputtering10.1063/1.2437163 ↗
16. Improved ferroelectric behavior in (110) oriented BiFeO3 thin films10.1063/1.3296226 ↗
17. Thickness dependent size effect of BiFeO3 films grown on LaNiO3-buffered Si substrates10.1063/1.3054169 ↗
18. Origin of abnormal structural transformation in a (BiPb) FeO3/SrRuO3/SrTiO3 hetero-structure probed by Rutherford backscattering10.1038/s41598-017-04543-6 ↗
19. Defect chemistry and electrical properties of BiFeO310.1039/C7TC03345A ↗
20. Surface chemical and photocatalytic consequences of Ca-doping of BiFeO3 as probed by XPS and H2O2 decomposition studies10.1016/j.apsusc.2014.09.007 ↗
21. Magnetic properties dependence on Fe2+/Fe3+ and oxygen vacancies in SrTi0.95Fe0.05O3 nanocrystalline prepared by hydrothermal method10.1016/j.mee.2015.04.119 ↗
22. Interpretation of oxygen 1s x-ray photoelectron spectroscopy of ZnO10.1021/acs.chemmater.3c00801 ↗
23. Atomic layer deposition enabled perovskite/PEDOT solar cells in a regular n–i–p architectural design10.1002/admi.201700043 ↗
24. Surface chemical bonding states and ferroelectricity of Ce-doped BiFeO3 thin films prepared by sol–gel process10.1007/s10971-008-1825-x ↗
25. Enhanced ferroelectricity in Ti-doped multiferroic BiFeO3 thin films
26. Microstructure, electrical and magnetic properties of Ce-doped BiFeO3
27. First-principles study of spontaneous polarization in multiferroic Bi Fe O310.1103/PhysRevB.71.014113 ↗
28. Destruction of spin cycloid in (111)c-oriented BiFeO3 thin films by epitiaxial constraint: enhanced polarization and release of latent magnetization10.1063/1.1851612 ↗
29. Realization of large-area wrinkle-free monolayer graphene films transferred to functional substrates10.1038/srep09610 ↗
30. Thickness-dependent retention behaviors and ferroelectric properties of BiFeO3 thin films on BaPbO3 electrodes
31. Enhanced electrical insulation and ferroelectricity in La and Ni co-doped BiFeO3 thin films10.1016/j.jallcom.2014.09.161 ↗
32. Effect of oxygen pressure on the structural, electrical properties of Bi0.90La0.10Fe0.95Mn0.05O3 thin films and characterization for memory applications
33. Influence of oxygen pressure on the ferroelectric properties of BiFeO3 thin films on LaNiO3/Si substrates via laser ablation10.1007/s00339-010-5918-3 ↗
34. Domain wall conduction and polarization-mediated transport in ferroelectrics10.1002/adfm.201300085 ↗
35. Local conductivity and the role of vacancies around twin walls of (001)−BiFeO3 thin films10.1063/1.4746073 ↗
36. Nanoscale piezoresponse and magnetic studies of multiferroic Co and Pr co-substituted BFO thin films10.1016/j.materresbull.2012.09.026 ↗
37. Influence of oxygen pressure on the ferroelectric properties of epitaxial BiFeO3 thin films by pulsed laser deposition10.1103/PhysRevB.80.024105 ↗
38. Kao · 1981
39. Polarity control of carrier injection at ferroelectric/metal interfaces for electrically switchable diode and photovoltaic effects
40. Leakage mechanisms in BiFeO3 thin films10.1063/1.2535663 ↗
41. Temperature-dependent leakage mechanisms of Pt/BiFeO3/SrRuO3 thin film capacitors
42. Greatly reduced leakage current and conduction mechanism in aliovalent-ion-doped BiFeO310.1063/1.1862336 ↗
43. The effects of grain size on electrical properties and domain structure of BiFeO3 thin films by sol–gel method10.1007/s10854-015-3690-z ↗
44. Local electrical conduction in polycrystalline La-doped BiFeO3 thin films
45. Nanoscale morphological and electrical homogeneity of HfO2 and ZrO2 thin films studied by conducting atomic-force microscopy10.1063/1.1885166 ↗
46. Domain wall conductivity in La-doped BiFeO310.1103/PhysRevLett.105.197603 ↗