Browsing by Author "Katsarakis, N."
Now showing items 1-7 of 7
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Coexistence of ferromagnetic and glassy behavior in semiconducting LaNi 0.2Co 0.8O 3
Androulakis, J.; Katsarakis, N.; Giapintzakis, John (2002)Systematic dc and ac magnetic susceptibility studies have been performed on single-phase LaNi 0.2Co 0.8O 3 powder samples. Evidence of hysteresis loops supports the existence of ferromagnetic correlations that lead to a ...
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Article
Comparative study of the magnetic and magnetotransport properties of a metallic and a semiconducting member of the solid solution LaNixCo1-xO3
Androulakis, J.; Katsarakis, N.; Viskadourakis, Z.; Giapintzakis, John (2003)A metallic and a semiconducting member of the solid solution LaNixCo1-xO3 (x=0.2, 0.6) with their magnetic and magnetotransport properties was investigated. The members of the perovskite solid solution were found on opposite ...
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Article
Effect of gold and silver nanoislands on the electrochemical properties of carbon nanofoam
Spanakis, E.; Pervolaraki, M.; Giapintzakis, John; Katsarakis, N.; Koudoumas, E.; Vernardou, D. (2013)•Metallic nanoislands coated on the exterior surface of carbon nanofoam.•Their properties are dependent on the type of the metallic nanoisland.•The gold-associated redox reactions enhance their electrochemical performance.
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Ferromagnetic and antiferromagnetic interactions in lanthanum cobalt oxide at low temperatures
Androulakis, J.; Katsarakis, N.; Giapintzakis, John (2001)Systematic dc and ac magnetic susceptibility studies have been performed on single-phase (formula presented) powder samples. Evidence is presented in support of the existence of ferromagnetic (FM1, FM2) and antiferromagnetic ...
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Article
LaSrMnCoO6: A new cubic double perovskite oxide
Androulakis, J.; Katsarakis, N.; Giapintzakis, John; Vouroutzis, N.; Pavlidou, E.; Chrissafis, K.; Polychroniadis, E. K.; Perdikatsis, V. (2003)Single-phase polycrystalline powder samples of the double perovskite oxide LaSrMnCoO6 were synthesized by the Pechini (citrate-gel) technique. The structural, magnetic and electrical properties of the obtained powders were ...
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Realization of La2MnVO6: Search for half-metallic antiferromagnetism?
Androulakis, J.; Katsarakis, N.; Giapintzakis, John (2002)Single-phase polycrystalline La2MnVO6 samples were synthesized by arc-melting and characterized by X-ray diffraction, magnetization and resistivity measurements. We find that the compound has cubic (space group Fm3̄m), ...
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Article
The use of pulsed laser deposited seed layers for the aqueous solution growth of highly oriented ZnO nanowires on sapphire substrates at 95 C: Study of their photocatalytic activity in terms of octadecanoic (stearic) acid degradation
Kenanakis, G.; Pervolaraki, M.; Giapintzakis, John; Katsarakis, N. (2013)The photocatalytic activity of ZnO nanowires grown via an aqueous solution approach at 95 C onto sapphire substrates, which were first pre-coated with ZnO seed layers deposited by pulsed laser deposition at various ...