Materials Map

Discover the materials research landscape. Find experts, partners, networks.

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The Materials Map is an open tool for improving networking and interdisciplinary exchange within materials research. It enables cross-database search for cooperation and network partners and discovering of the research landscape.

The dashboard provides detailed information about the selected scientist, e.g. publications. The dashboard can be filtered and shows the relationship to co-authors in different diagrams. In addition, a link is provided to find contact information.

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Materials Map under construction

The Materials Map is still under development. In its current state, it is only based on one single data source and, thus, incomplete and contains duplicates. We are working on incorporating new open data sources like ORCID to improve the quality and the timeliness of our data. We will update Materials Map as soon as possible and kindly ask for your patience.

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1.080 Topics available

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977 Locations available

693.932 PEOPLE
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Naji, M.
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Koinuma, H.

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in Cooperation with on an Cooperation-Score of 37%

Topics

Publications (17/17 displayed)

  • 2005Improved stoichiometry and misfit control in perovskite thin film formation at a critical fluence by pulsed laser deposition240citations
  • 2004High-resolution synchrotron-radiation photoemission characterization for atomically-controlled SrTiO3(001) substrate surfaces subjected to various surface treatments49citations
  • 2004Epitaxial growth and physical properties of a room temperature ferromagnetic semiconductor: Anatase phase Ti1−xCoxO232citations
  • 2003A high-resolution synchrotron-radiation angle-resolved photoemission spectrometer with <i>in situ</i> oxide thin film growth capability122citations
  • 2003Modeling and simulation of polycrystalline ZnO thin-film transistors303citations
  • 2003Layer-by-layer growth of high-optical-quality ZnO film on atomically smooth and lattice relaxed ZnO buffer layer71citations
  • 200345° rotational epitaxy of SrTiO3 thin films on sulfide-buffered Si13citations
  • 2003Experimental investigation of ferromagnetism in II-VI disordered semiconducting compounds1citations
  • 2003Quantitative control and detection of heterovalent impurities in ZnO thin films grown by pulsed laser deposition39citations
  • 2002Effect of MgZnO-layer capping on optical properties of ZnO epitaxial layers31citations
  • 2002Vapor–liquid–solid tri-phase pulsed-laser epitaxy of RBa2Cu3O7−y single-crystal films64citations
  • 2002In-plane lattice constant tuning of an oxide substrate with Ba1−xSrxTiO3 and BaTiO3 buffer layers42citations
  • 2002Systematic examination of carrier polarity in composition spread ZnO thin films codoped with Ga and N96citations
  • 2001Ferromagnetic interactions in p- and n-type II-VI diluted magnetic semiconductorscitations
  • 2001High-temperature goniometer for thin film growth and ion scattering studies11citations
  • 2001Anatase TiO2 thin films grown on lattice-matched LaAlO3 substrate by laser molecular-beam epitaxy149citations
  • 2000In-plane anisotropic strain of ZnO closely packed microcrystallites grown on tilted (0001) sapphirecitations

Places of action

Chart of shared publication
Lippmaa, M.
5 / 6 shared
Meguro, S.
1 / 1 shared
Ohnishi, T.
2 / 2 shared
Kobayashi, D.
1 / 1 shared
Ono, K.
2 / 3 shared
Oshima, M.
2 / 2 shared
Kumigashira, H.
2 / 5 shared
Tamura, K.
4 / 5 shared
Yamada, Y.
1 / 8 shared
Tsukazaki, A.
4 / 9 shared
Nakajima, K.
3 / 7 shared
Chikyow, T.
5 / 6 shared
Toyosaki, H.
1 / 1 shared
Fukumura, T.
5 / 9 shared
Aoyama, T.
1 / 2 shared
Segawa, Y.
5 / 5 shared
Hasegawa, T.
1 / 5 shared
Horiba, K.
1 / 4 shared
Nakagawa, N.
1 / 1 shared
Ohguchi, H.
1 / 1 shared
Ohtomo, A.
5 / 6 shared
Fujioka, H.
1 / 1 shared
Ohno, H.
1 / 25 shared
Nishii, J.
1 / 1 shared
Takagi, S.
1 / 3 shared
Hossain, Faruque M.
1 / 1 shared
Chichibu, S. F.
1 / 1 shared
Yoshida, S.
1 / 4 shared
Koida, T.
1 / 2 shared
Makino, T.
3 / 7 shared
Chia, C. H.
2 / 2 shared
Yoo, Y.-Z.
1 / 1 shared
Konishi, Y.
1 / 1 shared
Yonezawa, Y.
1 / 1 shared
Song, J. H.
2 / 2 shared
Jin, Zheng-Wu
1 / 1 shared
Ahmet, P.
4 / 5 shared
Dietl, Tomasz
2 / 262 shared
Matsukura, F.
1 / 23 shared
Sawicki, M.
2 / 67 shared
Van Khoi, L.
2 / 4 shared
Kawasaki, M.
3 / 40 shared
Jin, Z.
1 / 5 shared
Sumiya, M.
2 / 2 shared
Fuke, S.
2 / 2 shared
Matsumoto, Y.
2 / 7 shared
Kanda, N.
1 / 1 shared
Choi, B. D.
1 / 1 shared
Yun, K. S.
1 / 1 shared
Itoh, T.
1 / 3 shared
Terai, K.
1 / 1 shared
Fujii, T.
1 / 4 shared
Saito, H.
1 / 1 shared
Ohtani, M.
1 / 1 shared
Andrearczyk, T.
1 / 21 shared
Cibert, J.
1 / 24 shared
Tatarenko, S.
1 / 20 shared
Jaroszynski, J.
1 / 26 shared
Ferrand, D.
1 / 25 shared
Jin, Zw
1 / 1 shared
Bourgognon, C.
1 / 5 shared
Ohashi, S.
1 / 1 shared
Furumochi, T.
1 / 1 shared
Nagasawa, H.
1 / 1 shared
Ishida, T.
1 / 3 shared
Satoh, T.
1 / 1 shared
Murakami, M.
1 / 6 shared
Wong, Gkl
1 / 1 shared
Tang, Zk
1 / 1 shared
Siah, F.
1 / 1 shared
Chart of publication period
2005
2004
2003
2002
2001
2000

Co-Authors (by relevance)

  • Lippmaa, M.
  • Meguro, S.
  • Ohnishi, T.
  • Kobayashi, D.
  • Ono, K.
  • Oshima, M.
  • Kumigashira, H.
  • Tamura, K.
  • Yamada, Y.
  • Tsukazaki, A.
  • Nakajima, K.
  • Chikyow, T.
  • Toyosaki, H.
  • Fukumura, T.
  • Aoyama, T.
  • Segawa, Y.
  • Hasegawa, T.
  • Horiba, K.
  • Nakagawa, N.
  • Ohguchi, H.
  • Ohtomo, A.
  • Fujioka, H.
  • Ohno, H.
  • Nishii, J.
  • Takagi, S.
  • Hossain, Faruque M.
  • Chichibu, S. F.
  • Yoshida, S.
  • Koida, T.
  • Makino, T.
  • Chia, C. H.
  • Yoo, Y.-Z.
  • Konishi, Y.
  • Yonezawa, Y.
  • Song, J. H.
  • Jin, Zheng-Wu
  • Ahmet, P.
  • Dietl, Tomasz
  • Matsukura, F.
  • Sawicki, M.
  • Van Khoi, L.
  • Kawasaki, M.
  • Jin, Z.
  • Sumiya, M.
  • Fuke, S.
  • Matsumoto, Y.
  • Kanda, N.
  • Choi, B. D.
  • Yun, K. S.
  • Itoh, T.
  • Terai, K.
  • Fujii, T.
  • Saito, H.
  • Ohtani, M.
  • Andrearczyk, T.
  • Cibert, J.
  • Tatarenko, S.
  • Jaroszynski, J.
  • Ferrand, D.
  • Jin, Zw
  • Bourgognon, C.
  • Ohashi, S.
  • Furumochi, T.
  • Nagasawa, H.
  • Ishida, T.
  • Satoh, T.
  • Murakami, M.
  • Wong, Gkl
  • Tang, Zk
  • Siah, F.
OrganizationsLocationPeople

article

Quantitative control and detection of heterovalent impurities in ZnO thin films grown by pulsed laser deposition

  • Ohtomo, A.
  • Tamura, K.
  • Tsukazaki, A.
  • Sumiya, M.
  • Koinuma, H.
  • Fuke, S.
Abstract

<jats:p>Impurities in ZnO specimens, including targets for pulsed laser deposition and thin films resulting from their use, were analyzed by secondary ion mass spectroscopy (SIMS). Negatively charged complex ions bound with oxygen (71Ga16O− and N14O-16) were found to be the most reliable species with which to evaluate the Ga and N content of ZnO films by clarifying possible mass interference effects in SIMS analysis. Calibrations were carried out to determine the Ga concentration (CGa) and the nitrogen concentration (CN) by normalizing the signal intensities for G71O-16 and N14O-16, respectively, to that for Z70O-16. Alternative ablation of pure single crystal and Ga-doped ceramic ZnO targets was found to be effective not only for achieving systematic control of the Ga concentration in ZnO:(Ga,N) films, but also for minimizing the contamination of undesired impurities from the sintered targets. The substrate temperature plays a decisive role in control of CN due to a thermally activated desorption process of N-related species during deposition. Systematic control of the CN/CGa ratio in a ZnO:(Ga,N) film was carried out on a ScAlMgO4 substrate by introducing a controlled temperature gradient on the substrate during deposition. A region with the correct concentration ratio of CN/CGa=2, where p-type conduction of the ZnO film was theoretically predicted, was included in the composition spread sample in which the CN/CGa ratio was continuously varied over a wide range.</jats:p>

Topics
  • single crystal
  • thin film
  • Oxygen
  • Nitrogen
  • ceramic
  • pulsed laser deposition
  • selective ion monitoring
  • normalizing