Coexistence of ferromagnetic and glassy behavior in semiconducting LaNi 0.2Co 0.8O 3
SourceJournal of Applied Physics
Google Scholar check
MetadataShow full item record
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 rapid increase of the dc susceptibility at T≤55K. The frequency dependence of the ac susceptibility is suggestive of a spin-glass-like phase. The temperature dependence of the nonlinear susceptibility components, χ 2 and χ 3, in zero dc magnetic field demonstrates the existence of spontaneous magnetization, appears to exclude the occurrence of a canonical spin-glass phase and instead indicates that a cluster-glass phase occurs in LaNi 0.2Co 0.8O 3. It is suggested that the spontaneous magnetization in this system is due to the existence of Ni-based clusters with strong intracluster ferromagnetic correlations, embedded randomly in a paramagnetic matrix. © 2002 American Institute of Physics.
Showing items related by title, author, creator and subject.
Androulakis, J.; Giapintzakis, John (2010)We report on a detailed study of the electrical resistivity and the magnetoresistance of the metallic members of the LaNi1-xCoxO3 series with 0.3≤x≤0.6. The low-temperature resistivity of the compounds with 0.3≤x≤0.5 ...
Relations of crystal structure to magnetic properties in the quasi-one-dimensional compound PbNi1.88Mg0.12V 2O8 Mastoraki, I.; Lappas, A.; Giapintzakis, John; Többens, D.; Hernández-Velasco, J. (2004)The crystal structure of the quasi-one-dimensional oxide PbNi 1.88Mg0.12V2O8 has been studied by Rietveld analysis of combined high-resolution neutron and X-ray powder diffraction data at 300K and at low temperatures. The ...
Pervolaraki, M.; Sima, F.; Socol, G.; Teodorescu, C. M.; Gheorghe, N. G.; Socol, M.; Mihailescu, I. N.; Moushi, E. E.; Tasiopoulos, Anastasopoulos J.; Athanasopoulos, G. I.; Viskadourakis, Z.; Giapintzakis, John (2012)Single molecule magnets are of great interest due to a multitude of potential applications for some of which thin films are required. Traditional physical vapor deposition techniques are not suitable for the deposition of ...