R
Roland Hayn
Researcher at Aix-Marseille University
Publications - 159
Citations - 2377
Roland Hayn is an academic researcher from Aix-Marseille University. The author has contributed to research in topics: Electronic structure & Density functional theory. The author has an hindex of 26, co-authored 152 publications receiving 2149 citations. Previous affiliations of Roland Hayn include Leibniz Association & Centre national de la recherche scientifique.
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Journal Article
Magnetic anisotropy of Co2+ as signature of intrinsic ferrromagnetism in ZnO:Co
P. Sati,Roland Hayn,R. O. Kuzian,S. Shäfer,S. Régnier,A. Stepanov,Christian Morhain,Christiane Deparis,M. Laügt,Michel Goiran,Z. Golacki +10 more
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Zn doping of YBa2Cu3O7 in melt textured materials: peak effect and high trapped fields
G. Krabbes,G. Fuchs,P. Schätzle,S Gruß,Jai Won Park,Ferdinand Hardinghaus,G Stöver,Roland Hayn,S.-L. Drechsler,T Fahr +9 more
TL;DR: In this article, a modified melt crystallization process (MMCP) was applied to prepare single grain YBCO bulk material with Zn partially substituting for Cu. Hole doping was controlled by an appropriate oxidizing treatment of the as-grown bulk.
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Self-consistent LCAO-CPA method for disordered alloys
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LSDA + U versus LSDA: Towards a better description of the magnetic nearest-neighbor exchange coupling in Co- and Mn-doped ZnO
TL;DR: In this paper, the magnetic interactions between two nearest-neighbor substitutional magnetic ions (Co or Mn) were calculated by means of density functional theory and compared with the available experimental data.
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Magnetic State around Cation Vacancies in II–VI Semiconductors
TL;DR: It is shown that a single Zn vacancy in ZnO yields a total spin ST=1 in agreement with experiments, but for the other less ionic Zn-based II-VI semiconductors ZnA this spin triplet state is nearly degenerate with a nonmagnetic spin singlet state.