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Hussain S, Awan SU, Mumtaz A, Siddique R, Aftab M, Hasanain SK. Investigation of electronic, ferroelectric and local electrical conduction behavior of RF sputtered BiFeO 3thin films. NANOTECHNOLOGY 2024; 35:295704. [PMID: 38631335 DOI: 10.1088/1361-6528/ad3fc6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Accepted: 04/17/2024] [Indexed: 04/19/2024]
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/O24:1 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 (150μC cm-2). The leakage current density is as low as 10-2A cm-2at 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.
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Affiliation(s)
- Shahzad Hussain
- Magnetism Lab, Department of physics, COMSATS University, Islamabad 44000, Pakistan
- Department of Physics, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Saif Ullah Awan
- Department of Electrical Engineering, NUST College of Electrical & Mechanical Engineering, National University of Sciences and Technology (NUST), Campus H-12, 44000 Islamabad, Pakistan
| | - Arif Mumtaz
- Department of Physics, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Resham Siddique
- Magnetism Lab, Department of physics, COMSATS University, Islamabad 44000, Pakistan
| | - Muhammad Aftab
- Department of Physics, Quaid-i-Azam University, Islamabad 45320, Pakistan
- Department of Physics, Government Postgraduate College No. 1 Abbottabad, Pakistan
| | - S K Hasanain
- Department of Physics, Quaid-i-Azam University, Islamabad 45320, Pakistan
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Dwivedi GD, Wu CM, Chen BY, Lin ST, Qiu WZ, Sun SJ, Xu G, Lynn JW, Chiou JW, Lee CH, Li WH, Yano S, Chou H. Magnon profile on SrRuO 3 films studied by inelastic neutron scattering. PHYSICAL REVIEW. B 2020; 101:10.1103/PhysRevB.101.054403. [PMID: 38855404 PMCID: PMC11160330 DOI: 10.1103/physrevb.101.054403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2024]
Abstract
In this study, the inelastic neutron scattering probe of SIKA in ANSTO is employed to investigate the magnon dispersion curve in ferromagnetic SrRuO3 single crystal epitaxial films and to better understand the underlying mechanisms. This report presents the successful measurement of a magnon peak from the SrRuO3 films which contained an amount of material of only 0.9 mg. We reveal one significant magnon dispersion curve along [002] following the quadraticE ∝ Q 2 ) relation, which shows a magnon gap of 0.32 meV. We have discussed several possible mechanisms, such as the higher symmetry structure and the impurity levels, which may contribute to this smaller gap.
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Affiliation(s)
- G. D. Dwivedi
- Department of Physics, National Sun Yat-sen University, Kaohsiung, Taiwan, 80424, R.O.C
| | - C.-M. Wu
- National Synchrotron Radiation Research Center, Hsinchu, Taiwan, 30076, R.O.C. and Australian Nuclear Science and Technology Organization, New South Wales, Australia
| | - Bo-Yu Chen
- Department of Physics, National Sun Yat-sen University, Kaohsiung, Taiwan, 80424, R.O.C
| | - S. T. Lin
- Department of Physics, National Sun Yat-sen University, Kaohsiung, Taiwan, 80424, R.O.C
| | - W.-Z. Qiu
- Department of Physics, National Sun Yat-sen University, Kaohsiung, Taiwan, 80424, R.O.C
| | - S. J. Sun
- Department of Physics, National Sun Yat-sen University, Kaohsiung, Taiwan, 80424, R.O.C
- Department of Applied Physics, National University of Kaohsiung, Kaohsiung, Taiwan, R.O.C
| | - Guangyong Xu
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - J. W. Lynn
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - J. W. Chiou
- Department of Applied Physics, National University of Kaohsiung, Kaohsiung, Taiwan, R.O.C
| | - C.-H Lee
- Department of Physics, National Central University, Taoyuan City, Taiwan, R.O.C
| | - W.-H. Li
- Department of Physics, National Central University, Taoyuan City, Taiwan, R.O.C
| | - S. Yano
- National Synchrotron Radiation Research Center, Hsinchu, Taiwan, 30076, R.O.C. and Australian Nuclear Science and Technology Organization, New South Wales, Australia
| | - H. Chou
- Department of Physics, National Sun Yat-sen University, Kaohsiung, Taiwan, 80424, R.O.C
- Department of Applied Physics, National University of Kaohsiung, Kaohsiung, Taiwan, R.O.C
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