Ferromagnetism in Mn-Doped ZnO: A Joint Theoretical and Experimental Study

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dc.contributor.authorAli, N.
dc.contributor.authorSingh, B.
dc.contributor.authorA R, V.
dc.contributor.authorLal, S.
dc.contributor.authorYadav, C.S.
dc.contributor.authorTarafder, K.
dc.contributor.authorGhosh, S.
dc.date.accessioned2026-02-05T09:27:09Z
dc.date.issued2021
dc.description.abstractWe present a joint theoretical and experimental investigation on the origin of ferromagnetism in Mn-doped ZnO. Theoretical calculations revealed that the zinc vacancy (VZn) induces ferromagnetic ordering (FMO), whereas the oxygen vacancy (VO) quenches FMO in the Mn-doped ZnO system. This is further corroborated by the experimental results. Magnetic measurements revealed that Mn-doped ZnO shows room-temperature ferromagnetism (RTFM). Saturated magnetic moment per Mn2+ ion increases with oxygen partial pressure, indicating that the VZn enhances FMO in Mn-doped ZnO. Electron paramagnetic resonance and photoluminescence measurements revealed the presence of VZn in Mn-doped ZnO films. X-ray photoelectron spectroscopy measurements showed mixed oxidation states of Mn in Mn-doped ZnO films. Finally, we show that RTFM at very low doping concentrations is due to the overlapping of bound magnetic polarons. However, due to antiferromagnetic coupling at higher doping concentrations, the FMO weakens. © 2021 American Chemical Society.
dc.identifier.citationJournal of Physical Chemistry C, 2021, 125, 14, pp. 7734-7745
dc.identifier.issn19327447
dc.identifier.urihttps://doi.org/10.1021/acs.jpcc.0c08407
dc.identifier.urihttps://idr.nitk.ac.in/handle/123456789/23256
dc.publisherAmerican Chemical Society
dc.subjectAntiferromagnetism
dc.subjectBinary alloys
dc.subjectII-VI semiconductors
dc.subjectMagnetic moments
dc.subjectManganese metallography
dc.subjectMetallic films
dc.subjectOxide minerals
dc.subjectOxygen
dc.subjectParamagnetic resonance
dc.subjectPolarons
dc.subjectSemiconductor doping
dc.subjectX ray photoelectron spectroscopy
dc.subjectZinc oxide
dc.subjectAntiferromagnetic coupling
dc.subjectExperimental investigations
dc.subjectFerromagnetic orderings
dc.subjectLow doping concentrations
dc.subjectOxygen partial pressure
dc.subjectPhotoluminescence measurements
dc.subjectRoom temperature ferromagnetism (RTFM)
dc.subjectTheoretical calculations
dc.subjectFerromagnetism
dc.titleFerromagnetism in Mn-Doped ZnO: A Joint Theoretical and Experimental Study

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