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Deterministic Periodical and Quasiperiodical Surfaces of III-V Compounds: Preparation, Investigations and Applications

100%
Dmitruk N., Mayeva O., Yastrubchak O., Beketov G.
Acta Physica Polonica A
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1998
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vol. 94
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issue 2
285-290
EN
Autocorrelation functions for rough (random, quasiperiodical and deterministicperiodical) surfaces are deduced from the surface profiles determined by using the line-by-line analysis of atomic force microscopy images. It is shown that the initial parts of autocorrelation functions have a Gaussian form. An attempt to use the concept of fractal as a bridge between deterministic periodic and random (spontaneous) surfaces including quasiperiodic ones have been made.
2
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Influence of Ion Implantation on Magnetic Structural and Optical Properties of (Ga,Mn)As Epitaxial Films

64%
Yastrubchak O., Kulik M., Żuk J., Domagała J., Szymczak R., Wosiński T., Sadowski J., Tóth A.
Acta Physica Polonica A
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2008
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vol. 114
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issue 5
1445-1450
EN
We performed implantation experiments, applying both the chemically active oxygen ions and inactive ions of neon noble gas, to thin epitaxial films of (Ga,Mn)As ferromagnetic semiconductor. Inspection of their magnetic properties by means of a superconducting quantum interference device magnetometer revealed that the implantation with a low dose of either O or Ne ions completely suppressed ferromagnetism in the films. Both the high resolution X-ray diffraction technique and the Raman spectroscopy showed significant changes in the structural and optical properties of the films caused by oxygen implantation and confirmed the preservation of high structural and optical quality of the neon implanted (Ga,Mn)As films.
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