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Front Cover: Influence of texture on the ferromagnetic properties of nanograined ZnO films (Phys. Status Solidi B 7/2011)
Author(s) -
Straumal Boris,
Mazilkin Andrei,
Protasova Svetlana,
Myatiev Ata,
Straumal Petr,
Goering Eberhard,
Baretzky Brigitte
Publication year - 2011
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201190020
Subject(s) - materials science , grain boundary , misorientation , wurtzite crystal structure , ferromagnetism , texture (cosmology) , condensed matter physics , grain size , sapphire , zinc , metallurgy , optics , microstructure , physics , laser , artificial intelligence , computer science , image (mathematics)
For grain boundaries (GBs) in metals it is very well known that the character of the GB distribution, i.e. misorientation and orientation, can drastically change the properties of polycrystals. Straumal et al. ( pp. 1581–1586 ) compare the magnetic properties of nanograined ZnO films with the same grain size but with different character of GB distribution. Pure and doped ZnO can become ferromagnetic only if the specific area of the grain boundaries is high enough with grain size in the nanometer range. Furthermore, the ZnO magnetization depends on the texture, i.e. on the topology of “ferromagnetic grain boundary foam”. The cover image is the dark field TEM micrograph of a nanograined pure ZnO thin film deposited on sapphire and annealed in argon. The electron diffraction pattern (inset) shows only rings from the ZnO wurtzite structure. No texture is visible.