dc.contributor.author | Can, Musa Mutlu | |
dc.contributor.author | ÖZCAN, ŞADAN | |
dc.contributor.author | Firat, Tezer | |
dc.date.accessioned | 2021-03-05T15:37:13Z | |
dc.date.available | 2021-03-05T15:37:13Z | |
dc.date.issued | 2010 | |
dc.identifier.citation | Can M. M. , Firat T., ÖZCAN Ş., "Structural, Optic, and Magnetic Investigation of the Synthesized ZnO and Zn0.99Co0.01O Semiconductors via Solid State Reaction", IEEE TRANSACTIONS ON MAGNETICS, cilt.46, ss.1809-1812, 2010 | |
dc.identifier.issn | 0018-9464 | |
dc.identifier.other | vv_1032021 | |
dc.identifier.other | av_bcabc93e-94a4-49ad-b043-b8ff64625431 | |
dc.identifier.uri | http://hdl.handle.net/20.500.12627/125406 | |
dc.identifier.uri | https://doi.org/10.1109/tmag.2009.2039988 | |
dc.description.abstract | Both ZnO and Zn0.99Co0.01O semiconductors were synthesized through solid state reaction via mechanical milling and thermal treatment. Initially the wurtzite ZnO structures of the synthesized particles were characterized by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). Since these techniques were unable to identify both contamination atoms and Co distribution, energy dispersive X-ray spectrometry (EDS) was used. EDS showed a successful doping of Co atoms with the atomic ratio of 0.9 +/-0.1%, and also showed a contamination of tungsten (W) atoms, in the atomic ratio of 1.6 +/- 0.2% for Zn0.99Co0.01O, and 1.3 +/- 0.2% for ZnO. Substitutions of Co+2 ions with Zn+2 host atoms in the ZnO lattice were exposed through X-ray photo spectroscopy (XPS) data of Co 2p electronic energy levels. UV-vis absorption spectroscopy (UV-vis) was also used to prove Co substitutions in the ZnO lattice. This was revealed by a decrease in band gap from 3.25 +/- 0.01 eV to 3.03 +/- 0.01 eV, and the existence of newly permitted transitions between intra ionic levels. The ferromagnetic effect of Co doping in ZnO lattice was revealed by the coercivity of similar to 154 +/- 50 Oe and positive Curie-Weiss temperature, 79 +/- 1 K. Beside ferromagnetic interactions, the calculated effective Bohr Magnetron (mu(eff)), 0.32 +/- 0.01 mu B, suggested anti-ferromagnetic interactions due to be less than the theoretical spin based magnetic moment of Co2+ ions, 3.0 mu B. | |
dc.language.iso | eng | |
dc.subject | Temel Bilimler | |
dc.subject | Mühendislik ve Teknoloji | |
dc.subject | Temel Bilimler (SCI) | |
dc.subject | Sinyal İşleme | |
dc.subject | Bilgi Sistemleri, Haberleşme ve Kontrol Mühendisliği | |
dc.subject | Fizik | |
dc.subject | FİZİK, UYGULAMALI | |
dc.subject | Mühendislik, Bilişim ve Teknoloji (ENG) | |
dc.subject | Mühendislik | |
dc.subject | MÜHENDİSLİK, ELEKTRİK VE ELEKTRONİK | |
dc.title | Structural, Optic, and Magnetic Investigation of the Synthesized ZnO and Zn0.99Co0.01O Semiconductors via Solid State Reaction | |
dc.type | Makale | |
dc.relation.journal | IEEE TRANSACTIONS ON MAGNETICS | |
dc.contributor.department | Hacettepe Üniversitesi , , | |
dc.identifier.volume | 46 | |
dc.identifier.issue | 6 | |
dc.identifier.startpage | 1809 | |
dc.identifier.endpage | 1812 | |
dc.contributor.firstauthorID | 434914 | |