44 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
10 papers
Magnetic skyrmions in cylindrical ferromagnetic nanostructures with chiral interactions
Dimitris Kechrakos, Lida Tzannetou, Aristotelis Patsopoulos
We study the geometrical conditions for stabilizing magnetic skyrmions in cylindrical nanostrips and nanotubes of ferromagnetic materials with chiral interactions. We obtain the lo…
Iterative oscillation tests for differential equations with several non-monotone arguments
Elena Braverman, George E. Chatzarakis, Ioannis P. Stavroulakis
Sufficient oscillation conditions involving and for first-order differential equations with several non-monotone deviating arguments and nonnegative coefficie…
Magnetic properties of nanowires with ferromagnetic core and antiferromagnetic shell
A. Patsopoulos, D. Kechrakos, N. Moutis
We present a Monte Carlo study of the magnetic properties of thin cylindrical nanowires composed of a ferromagnetic core and an antiferromagnetic shell implementing a classical spi…
Exchange bias effect in cylindrical nanowires with ferromagnetic core and polycrystalline antiferromagnetic shell
A. Patsopoulos, D. Kechrakos
We model the exchange bias effect in thin cylindrical nanowires composed of a ferromagnetic core and an antiferromagnetic shell implementing a classical spin Hamiltonian and Monte…
Monte Carlo study of the exchange bias effect in Co/CoO core-shell nanowires
A. Patsopoulos, D. Kechrakos
We study the magnetic properties of cylindrical ferromagnetic core - antiferromagnetic shell nanowires using Monte Carlo simulations and a classical Heisenberg Hamiltonian in order…
An oscillation criterion for delay differential equations with several non-monotone arguments
H. Akca, G. E. Chatzarakis, I. P. Stavroulakis
The oscillatory behavior of the solutions to a differential equation with several non-monotone delay arguments and non-negative coefficients is studied. A new sufficient oscillatio…
Iterative oscillation tests for difference equations with several non-monotone arguments
Elena Braverman, George E. Chatzarakis, Ioannis P. Stavroulakis
We consider difference equations with several non-monotone deviating arguments and nonnegative coefficients. The deviations (delays and advances) are, generally, unbounded. Suffici…
Coercivity and random interfacial exchange coupling in CoPt/Co films
V. Alexandrakis, D. Kechrakos, N. Moutis +3
Hard-soft bilayers are analogous to prototype exchange-biased ferromagnetic -antiferromagnetic systems as the minor loop of the soft layer is biased by the hard and furthermore the…
Shape-dependent exchange bias effect in magnetic nanoparticles with core-shell morphology
V. Dimitriadis, D. Kechrakos, O. Chubykalo-Fesenko +1
We study the low-temperature isothermal magnetic hysteresis of cubical and spherical nanoparticles with ferromagnetic (FM) core - antiferromagnetic (AF) shell morphology, in order…
Magnetic Nanoparticle Assemblies
D. Kechrakos
This chapter provides an introduction to the fundamental physical ideas and models relevant to the phenomenon of magnetic hysteresis in nanoparticle assemblies. The concepts of sin…