2009
DOI: 10.1103/physrevb.79.125204
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Room-temperature ferromagnetism in Li-dopedp-type luminescent ZnO nanorods

Abstract: We have observed ferromagnetism in Li-doped ZnO nanorods with Curie temperature up to 554 K. Li forms shallow acceptor states in substitutional zinc sites giving rise to p-type conductivity. An explicit correlation emerges between increase in hole concentration with decrease in magnetization and Curie temperature in ZnO:Li. Occurrence of ferromagnetism at room temperature has been established with observed magnetic domain formation in ZnO:Li pellets in magnetic force microscopy and prominent ferromagnetic reso… Show more

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Cited by 147 publications
(89 citation statements)
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“…For ZnO:Li, hole concentration and resistivity varied from 1.6ϫ 10 16 to 1.3 ϫ 10 19 cm −3 and 107.5 to 43.7 k ⍀ cm, respectively, for variation in Li concentration from 2% to 15%. 15 The results unambiguously indicate that the hole concentration increases and resistivity decreases with increase in Li concentration and accord with earlier reports 16,17 on Li doped ZnO thin film deposited at 500°C. These indicated effective substitution of Li in zinc sites leading to p-type conductivity.…”
Section: B Hall Effect Measurementsupporting
confidence: 81%
See 1 more Smart Citation
“…For ZnO:Li, hole concentration and resistivity varied from 1.6ϫ 10 16 to 1.3 ϫ 10 19 cm −3 and 107.5 to 43.7 k ⍀ cm, respectively, for variation in Li concentration from 2% to 15%. 15 The results unambiguously indicate that the hole concentration increases and resistivity decreases with increase in Li concentration and accord with earlier reports 16,17 on Li doped ZnO thin film deposited at 500°C. These indicated effective substitution of Li in zinc sites leading to p-type conductivity.…”
Section: B Hall Effect Measurementsupporting
confidence: 81%
“…% Li doped ZnO. 15 ZnO:Li ͑2 at. %͒ sample exhibited a hysteresis loop with Curie temperature as high as 554 K. The hysteresis loop for ZnO:Na ͑2 at.…”
Section: Magnetic Measurementmentioning
confidence: 99%
“…5). Similar emission quenching has been reported in alkali doped ZnO nanorods [26]. The optical transition that is responsible for Gd 3+ emission is 6 P J → 8 S 7/2 (4f-4f transition), so the incorporation of Gd 3+ could improve the emission intensity of rare earth ions.…”
Section: Resultssupporting
confidence: 77%
“…Although there are few reports on Li doped ZnO thin films 13 and nanostructures. 14,15 Here in this letter, we report the growth and Li doping of ZnO NRs by a low temperature thermal decomposition method, which is a cost effective and rapid synthesis method for fabricating ZnO NRs. This growth method have some advantages compared with other growth methods, such as use of simple equipment, low temperature deposition, low cost, less hazardous, and does not require catalyst.…”
Section: © 2018 Author(s) All Article Content Except Where Otherwismentioning
confidence: 99%