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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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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in Cooperation with on an Cooperation-Score of 37%

Topics

Publications (4/4 displayed)

  • 2010A comparison of the valence band structure of bulk and epitaxial GeTe-based diluted magnetic semiconductors1citations
  • 2009RAMAN STUDY OF FERROELECTRIC BARTUM BISMUTH TITANATEcitations
  • 2009Native vacancy defects in Zn1-x(Mn,Co)(x)GeAs2 studied with positron annihilation spectroscopy12citations
  • 2006Magnetic properties of (Eu,Gd)Te semiconductor layerscitations

Places of action

Chart of shared publication
Pietrzyk, M. A.
1 / 1 shared
Orlowski, B. A.
1 / 3 shared
Slynko, V. E.
1 / 1 shared
Johnson, R. L.
1 / 3 shared
Story, T.
2 / 12 shared
Knoff, W.
1 / 2 shared
Slynko, E. I.
1 / 1 shared
Kowalski, B. J.
1 / 3 shared
Romcevic, Nebojsa
1 / 4 shared
Paunovic, N.
1 / 3 shared
Lazarevic, Zorica
1 / 2 shared
Bobić, Jelena
1 / 65 shared
Stojanović, Biljana
1 / 49 shared
Domukhovski, V.
1 / 4 shared
Varnavskiy, S. A.
1 / 1 shared
Kilanski, L.
1 / 2 shared
Marenkin, S. F.
1 / 3 shared
Tuomisto, Filip
1 / 44 shared
Zubiaga, A.
1 / 4 shared
Osinniy, V.
1 / 1 shared
Smits, Cjp Coen
1 / 2 shared
Dziawa, P.
1 / 2 shared
Lusakowska, E.
1 / 8 shared
Swagten, Hjm Henk
1 / 9 shared
Taliashvili, B.
1 / 1 shared
Dybko, K.
1 / 6 shared
Chart of publication period
2010
2009
2006

Co-Authors (by relevance)

  • Pietrzyk, M. A.
  • Orlowski, B. A.
  • Slynko, V. E.
  • Johnson, R. L.
  • Story, T.
  • Knoff, W.
  • Slynko, E. I.
  • Kowalski, B. J.
  • Romcevic, Nebojsa
  • Paunovic, N.
  • Lazarevic, Zorica
  • Bobić, Jelena
  • Stojanović, Biljana
  • Domukhovski, V.
  • Varnavskiy, S. A.
  • Kilanski, L.
  • Marenkin, S. F.
  • Tuomisto, Filip
  • Zubiaga, A.
  • Osinniy, V.
  • Smits, Cjp Coen
  • Dziawa, P.
  • Lusakowska, E.
  • Swagten, Hjm Henk
  • Taliashvili, B.
  • Dybko, K.
OrganizationsLocationPeople

article

Native vacancy defects in Zn1-x(Mn,Co)(x)GeAs2 studied with positron annihilation spectroscopy

  • Domukhovski, V.
  • Varnavskiy, S. A.
  • Dobrowolski, W.
  • Kilanski, L.
  • Marenkin, S. F.
  • Tuomisto, Filip
  • Zubiaga, A.
Abstract

We have studied vacancy defects in chalcopyrite semimagnetic semiconducting mixed Zn1-x(Mn,Co)(x)GeAs2 bulk crystals with alloy composition x varying between 0.052 to 0.182 using positron annihilation spectroscopy. We identified As vacancies, potentially complexed with the transition metal alloying elements, in all the studied samples, while no cation vacancy related defects were detected. The positron lifetimes for the bulk ZnGeAs2 lattice and neutral As vacancy were determined to be tau(B)=220-230 ps and tau(As)=300 +/- 10 ps, respectively. Our results also show that the p-type conductivity in the samples is not due to cation vacancy related acceptor centers. The As vacancies were found to be present at such low concentrations that they cannot be responsible for the compensation of the p-type conductivity or the reduction of mobility in the Zn1-x(Mn,Co)(x)GeAs2 samples.

Topics
  • impedance spectroscopy
  • mobility
  • positron annihilation lifetime spectroscopy
  • alloy composition
  • vacancy