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- 1. J. Appl. Phys. 101, 013902 (2007) , “An electron paramagnetic resonance study of n-type Zn1−xMnxO: A diluted magnetic semiconductor”, A. Ben Mahmoud, H. J. von Bardeleben, J. L. Cantin, E. Chikoidze, and A. MaugerWe present the results of an electron paramagnetic resonance study of homogeneous single phase Zn1−xMnxO thin films with Mn concentrations varying between x=0.07 and x=0.34. Our results show antiferromagnetic (AF) coupling in the entire... (Read more)
- 2. Appl. Phys. Lett. 89, 112113 (2006) , “Control of p- and n-type conductivities in Li-doped ZnO thin films”, J. G. Lu, Y. Z. Zhang, Z. Z. Ye, Y. J. Zeng, H. P. He, L. P. Zhu, J. Y. Huang, L. Wang, J. Yuan, B. H. Zhao, and X. H. LiLi-doped ZnO films were prepared by pulsed laser deposition. The carrier type could be controlled by adjusting the growth conditions. In an ionized oxygen atmosphere, p-type ZnO was achieved, with the hole concentration of 6.04×1017 cm3 at an optimal Li... (Read more)
- 3. Phys. Rev. B 74, 144432 (2006) , “Role of defects in ferromagnetism in Zn1−xCoxO: A hybrid density-functional study”, C. H. PattersonExperimental studies of Zn1−xCoxO as thin films or nanocrystals have found ferromagnetism and Curie temperatures above room temperature and that p- or n-type doping of Zn1−xCoxO can change its magnetic... (Read more)
- 4. Superlatt. Microstruct. 39, 247-256 (2006) , “Optical and morphological features of bulk and homoepitaxial ZnO”, R. Yakimova, G.R. Yazdi, N.T. Son, I. Ivanov, M. Syväjärvi, S. Sun, G. Tompa, A. Kuznetsov , B. SvenssonZnO substrate crystals from two different sources, and epitaxial layers have been studied by SEM, AFM, photoluminescence and EPR. Although fabricated by the same growth principle, i.e. the hydrothermal technique, the substrates differ in terms of purity and structural quality. In the PL spectra of... (Read more)
- 5. Appl. Phys. Lett. 87, 172108 (2005) , “Production of native donors in ZnO by annealing at high temperature in Zn vapor”, L. E. Halliburton, N. C. Giles, N. Y. Garces, Ming Luo, Chunchuan Xu, Lihai Bai, L. A. BoatnerZinc oxide crystals grown by the seeded chemical vapor transport method have been annealed in zinc vapor at 1100 °C for 30 min. These thermochemical reduction treatments produce a deep red coloration in the crystals and increase their n-type electrical conductivity. Electron paramagnetic... (Read more)
- 6. J. Appl. Phys. 94, 519-524 (2003) , “Molecular nitrogen (N2-" align="middle">) acceptors and isolated nitrogen (N–) acceptors in ZnO crystals”, N. Y. Garces, Lijun Wang, N. C. Giles, L. E. Halliburton, G. Cantwell, D. B. EasonElectron paramagnetic resonance (EPR) has been used to investigate molecular nitrogen and isolated nitrogen acceptors in single crystals of ZnO. These samples were grown by the seeded chemical vapor transport method with N2 added to the gas stream. A five-line EPR spectrum is observed at... (Read more)
- 7. Micro. Eng. 66, 59-64 (2003) , “Magnetic resonance studies on ZnO nanocrystals”, H. Zhou, A. Hofstaetter, D. M. Hofmann and B. K. MeyerZnO nanocrystals with diameters ranging from 4 to 50 nm were prepared via a wet chemical method and post-growth annealing treatments. The electron paramagnetic resonance (EPR) spectra of the nanocrystals show the resonance of electron centers with g-value close to that of the shallow donors in bulk... (Read more)
- 8. Phys. Rev. Lett. 88, 45504 (2002) , “Hydrogen: A Relevant Shallow Donor in Zinc Oxide”, Detlev M. Hofmann, Albrecht Hofstaetter, Frank Leiter, Huijuan Zhou, Frank Henecker, Bruno K. Meyer, Sergei B. Orlinskii, Jan Schmidt, Pavel G. BaranovElectron paramagnetic resonance and Hall measurements show consistently the presence of two donors ( D1 and D2) in state-of-the-art, nominally undoped ZnO single crystals. Using electron nuclear double resonance it is found that D1 shows hyperfine interaction with more than 50 shells of surrounding... (Read more)
- 9. Physica B 308-310, 976-979 (2001) , “Magnetic resonance studies of ZnO”, W. E. Carlos, E. R. Glaser and D. C. LookWe have used EPR and ODMR to study state-of-the-art bulk ZnO single crystals. Most of the samples are n-type; however, under certain conditions (e-irradiated or annealed), we observe a center due to residual nitrogen (g||=1.9953, g=1.9633 and Aiso=1.225 mT, Aaniso=0.864 mT). The N center is a... (Read more)
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