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 ACES  Vol.12 No.2 , April 2022
Focused-Ion-Beam Induced Paramagnetic Defects in FAMn:PbI3 Perovskite Films
Abstract: FAMn:PbI3 perovskite films were synthesized and probed mainly through electron spin resonance (ESR) spectroscopy. FAMn:PbI3 with low (~1%) Mn concentration showed a hyperfine sextet line originated from Mn++ ions. FAMn:PbI3 with high (10%) Mn concentration showed broad resonance (~500 G peak-to-peak linewidth). However, after bombardment of FAMn:PbI3 with high Mn concentration by focused ion beams (FIB), a sharp ESR peak appeared. The peak-to-peak linewidth (ΔHpp) was ~8 G regardless of the temperature. The FIB-induced defect showed Curie behavior at low temperatures (5 K - 50 K), which indicates the presence of localized electrons at the defect sites at low temperatures. The g-value increased from g = 2.0002 to 2.0016 as the temperature increased from 5 K to 50 K. Together with the ongoing search for electron spin echo (ESE), this could potentially provide a platform for realizing magnetic bits, information storage, and increased manipulation speed.
Cite this paper: Jeon, N. , Seo, J. , Kim, Y. , Lee, J. , Hong, S. , Kim, S. and Lee, J. (2022) Focused-Ion-Beam Induced Paramagnetic Defects in FAMn:PbI3 Perovskite Films. Advances in Chemical Engineering and Science, 12, 87-95. doi: 10.4236/aces.2022.122007.
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