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Volume 6 Research & Reviews: Journal of Material Sciences
ISSN: 2321-6212 Materials Physics 2018
August 16-17, 2018
August 16-17, 2018 | London, UK
4th International Conference on
Condensed Matter and Materials Physics
Magnetic properties of six-legs spin-S (S=½, 1) Ising nanotube under the effect of an external field
Mohamed El Hafidi, Z Elmaddahi and M Y El Hafidi
Hassan II University of Casablanca, Morocco
Over the last few years, magnetic nanoparticles (nanotubes and nanowires) have attracted the interest of experimental and
theoretical researches owing to their quantum importance, surface boundary effects and their promising technological
applications such as drug delivery, biomedicine, magnetic resonance (MRI), permanent magnets, long-lasting memories and
recording media. In this work, we study a single-walled hexagonal spin-S (S=½ or 1) Ising nanotube on the basis of the
effective-field theory (EFT) with correlations and the differential operator technique (DOT). In the six-leg spin nanotube,
each spin is connected to its nearest-neighbors through exchange couplings both along the chains (J//) and adjacent chains
(J⊥). Exact expressions for of magnetization, initial susceptibility, critical temperature are obtained as well as the ground phase
diagram that is established for different exchange couplings. Some interesting phenomena are revealed, especially for opposite
exchange interactions, magnetization plateaus and frustration are found.
Fig.1: Schematic structure of the hexagonal spin nootube. (a) The red circles display the magnetic specie (S = 1) ions. The green and blue lines correspond
respectively to the longitudinal exchange (J//) and transversal exchange (J ⊥) coupling paths . (b) Equivalent structure of the spin tube with the periodic boundary
condition in the direction of rung (under the cyclic constraint α+6=α).
Recent Publications:
1. Z.ElMaddahi A.Farchakh Hafidi and Hafidi. Magnetic and thermodynamic properties of a simple-wall
hexagonal spin nanotube. Computational Condensed Matter. Volume 13, December 2017, Pages 77-82
2. Abeslam Farchakh, Mohamed El Hafidi, Contribution to Spin Tubes Study, Journal of Superconductivity and Novel
Magnetism, May 2018, Volume 31, Issue 5, pp 1567–1575 in Journal of Superconductivity and Novel Magnetism
(2018).
Biography
Mohamed El Hafidi is Professor of Quantum Physics and Magnetism at Hassan University II of Casablanca (Morocco) since 1985. He prepared a part of his PhD
at the High Magnetic Field Laboratory (Grenoble, France) and he stayed as a visiting professor as a visiting professor at Joseph Fourier University of Grenoble. He
currently supervises research on topological structures and low dimensionality magnetic systems.
Mohamed El Hafidi et al., Res. Rev. J Mat. Sci. 2018, Volume 6
DOI: 10.4172/2321-6212-C2-017