Structural, magnetic and electronic properties of Zn0.94Co0.06O/ZnO heterostructure

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dc.contributor.authorRajput, Parasmani
dc.contributor.authorNand, Mangla
dc.contributor.authorGupta, Mukul
dc.contributor.authorSagdeo, P.R.
dc.contributor.authorSagdeo, A.
dc.contributor.authorSharma, S.K.
dc.contributor.authorCoelha, A.A.
dc.contributor.authorJha, S.N.
dc.contributor.authorBhattacharyya, D.
dc.contributor.authorKumar, Manvendra
dc.date.accessioned2024-01-21T10:42:34Z
dc.date.accessioned2024-08-13T12:44:37Z
dc.date.available2024-01-21T10:42:34Z
dc.date.available2024-08-13T12:44:37Z
dc.date.issued2021-10-12T00:00:00
dc.description.abstractIn the present work, single layers of ZnO, Zn0.94Co0.06O and Zn0.94Co0.06O/ZnO heterostructure thin film on quartz substrates as well as on Si (111) substrate have been prepared using RF ion beam sputtering. Grazing incident X-ray diffraction (GIXRD), UV�Vis spectroscopy, X-ray absorption near edge structure (XANES), vibrating sample magnetometer�(VSM) and photoelectron spectroscopy (PES) were performed to obtain structural, optical, electronic properties. GIXRD measurement confirms Wurtzite structure of ZnO, whereas UV�Vis spectroscopy shows a blue shift of the absorption edge in Zn0.94Co0.06O single layer with respect to ZnO film with band gap of 3.18 and 3.32�eV for ZnO and Zn0.94Co0.06O single layer films, respectively. The O K-edge spectra revealed O 2p hybridization with Zn3d4s/Co3d states, whereas Co L3-edge and Co K-edge XANES spectra confirm Co2+ oxidation state. M-H hysteresis measurement at 300�K shows a weak ferromagnetism for Zn0.94Co0.06O single layer and Zn0.94Co0.06O/ZnO heterostructure thin film. Furthermore, to obtain band offset of Zn0.94Co0.06O/ZnO heterostructure thin films, valance band maximum and core level peaks were measured using PES measurement. The offsets in valance band and conduction band for Zn0.94Co0.06O/ZnO heterostructure thin film were obtained as ~0.41�eV and ~0.55�eV, respectively, and compared with ~0.36�eV and ~0.51�eV, respectively, of Zn0.9Co0.1O/ZnO heterostructure thin films. The results show that a type-II band alignment in the studied system. � 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature.en_US
dc.identifier.doi10.1007/s00339-021-04969-w
dc.identifier.issn9478396
dc.identifier.urihttp://10.2.3.109/handle/32116/3677
dc.identifier.urlhttps://link.springer.com/10.1007/s00339-021-04969-w
dc.language.isoen_USen_US
dc.publisherSpringer Science and Business Media Deutschland GmbHen_US
dc.subjectHeterostructure interfaceen_US
dc.subjectVBen_US
dc.subjectXANESen_US
dc.subjectXPSen_US
dc.subjectXRDen_US
dc.titleStructural, magnetic and electronic properties of Zn0.94Co0.06O/ZnO heterostructureen_US
dc.title.journalApplied Physics A: Materials Science and Processingen_US
dc.typeArticleen_US
dc.type.accesstypeClosed Accessen_US

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