Zobrazeno 1 - 10
of 150
pro vyhledávání: '"Kechrakos, D."'
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 spin Hamiltonian. We address systematically the impact of interface excha
Externí odkaz:
http://arxiv.org/abs/1812.03339
Autor:
Patsopoulos, A., Kechrakos, D.
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 Carlo simulations. We address systematically the effect of shell polyc
Externí odkaz:
http://arxiv.org/abs/1805.04008
Autor:
Patsopoulos, A., Kechrakos, D.
Publikováno v:
Nanotechnology 28, 285701 (2017)
We study the magnetic properties of cylindrical ferromagnetic core - antiferromagnetic shell nanowires using Monte Carlo simulations and a classical Heisenberg Hamiltonian in order to elucidate the impact of the oxidized shell on the magnetic propert
Externí odkaz:
http://arxiv.org/abs/1706.02395
Autor:
Alexandrakis, V., Kechrakos, D., Moutis, N., Niarchos, D., Hadjipanayis, G., Panagiotopoulos, I.
Publikováno v:
J. Appl. Phys. 119, 123905 (2016)
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 they offer bias layer tunability. In sputtered CoPt/Co hard-soft bilayers
Externí odkaz:
http://arxiv.org/abs/1603.09618
Publikováno v:
Phys. Rev. B 92(6),064420 (2016)
We study the low-temperature isothermal magnetic hysteresis of cubical and spherical nanoparticles with ferromagnetic (FM) core - antiferromagnetic (AF) shell morphology, in order to elucidate the sensitivity of the exchange bias effect to the shape
Externí odkaz:
http://arxiv.org/abs/1508.01831
Autor:
Kechrakos, D.
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 single-domain particles and superparamagnetism are discussed. The mechani
Externí odkaz:
http://arxiv.org/abs/0907.4417
Autor:
Kechrakos, D., Trohidou, K. N.
Publikováno v:
J. Nanosci. Nanotechnol. 8(6), 2929 (2008)
Assemblies of magnetic nanoparticles exhibit interesting physical properties arising from the competition of intraparticle dynamics and interparticle interactions. In ordered arrays of magnetic nanoparticles magnetostatic interparticle interactions i
Externí odkaz:
http://arxiv.org/abs/cond-mat/0607520
Autor:
Kechrakos, D., Trohidou, K. N.
Publikováno v:
Phys. Rev. B 74, 144403 (2006)
We present Monte Carlo simulations of the reversible transverse susceptibility (RTS) for a hexagonal array of dipolar interacting magnetic nanoparticles with random anisotropy. RTS curves with the bias-field in-plane and out-of-plane are compared. Wi
Externí odkaz:
http://arxiv.org/abs/cond-mat/0607037
Publikováno v:
J. Magn. Magn. Mater. 316(2) e291-e294 (2007)
We calculate the magnetization hysteresis for an ordered array of composite magnetic nanoparticles with a ferromagnetic (FM) core and an antiferromagnetic (AFM) shell, located on a triangular lattice and coupled via magnetostatic forces. Each nanopar
Externí odkaz:
http://arxiv.org/abs/cond-mat/0607038
Autor:
Kechrakos, D., Trohidou, K. N.
Publikováno v:
Phys. Rev. B 054416 (8 pages) (2005)
The tunneling magnetoresistance (TMR) of a hexagonal array of dipolar coupled anisotropic magnetic nanoparticles is studied using a resistor network model and a realistic micromagnetic configuration obtained by Monte Carlo simulations. Analysis of th
Externí odkaz:
http://arxiv.org/abs/cond-mat/0407814