Theoretical simulations of magnetic nanotubes using Monte Carlo method

Konstantinova, Elena V.

doi:10.1016/j.jmmm.2008.06.007

Cited by 71 publications

(22 citation statements)

References 27 publications

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“…But, one should notice that the structure of a nanowire is a little different from that of a nanotube, which exhibits a core‐free configuration. Because of that difference and its potential applications to nano‐ and biotechnology 5, 6, the study of magnetic nanotubes, involving, e.g., FePt and Fe 3 O 4 nanotubes 7 and Monte Carlo simulation 8, has been receiving considerable attention recently by both experimental and theoretical researchers.…”

Section: Introductionmentioning

confidence: 99%

Magnetic properties of a cylindrical Ising nanowire (or nanotube)

Kaneyoshi

2011

Physica Status Solidi (b)

150

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Magnetic properties (phase diagram and magnetization) of a cylindrical Ising nanowire or nanotube are investigated by the use of the effective-field theory with correlations. Particular emphasis is given to the effects of the surface and its dilution on them. Much attention is paid to the thermal variation of the magnetization when the spins at the surface are coupled antiferromagnetically to the ferromagnetic core spins by the negative shell coupling. The effects of dilution at the surface, the surface exchange interaction, and the shell coupling on the magnetization profiles are investigated. We find a number of characteristic phenomena for them.

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Section: Introductionmentioning

confidence: 99%

Magnetic properties of a cylindrical Ising nanowire (or nanotube)

Kaneyoshi

2011

Physica Status Solidi (b)

150

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“…However, since their magnetization is close to zero, standard magnetic characterization precluded their experimental evidence until the advent of more sensitive techniques allowed their observation in individual nanocylinders, nanotubes and dot-shaped elements of different compositions by means of electron holography 35,36 , cantilever-based torque magnetometry [37][38][39][40] , nanoscale torque-SQUID magnetometry 41 , spin-polarized scanning tunneling spectroscopy 42 , X-ray microscopy 43 and MFM 44 . Different theoretical and simulation approaches have been used in order to study the thermodynamic properties of magnetic hollow nanocylinders, including micromagnetic studies 15,45 , scaling techniques 46,47 , many-body Green's functions [48][49][50] , ab-initio calculations [51][52][53] , and Monte Carlo (MC) simulations 54 .…”

Section: Introductionmentioning

confidence: 99%

Change in the magnetic configurations of tubular nanostructures by tuning dipolar interactions

Salinas

Restrepo

Iglesias

2018

Sci Rep

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We have investigated the equilibrium states of ferromagnetic single wall nanotubes by means of atomistic Monte Carlo simulations of a zig-zag lattice of Heisenberg spins on the surface of a cylinder. The main focus of our study is to determine how the competition between short-range exchange (J) and long-range dipolar (D) interactions influences the low temperature magnetic order of the nanotubes as well as the thermal-driven transitions involved. Apart from the uniform and vortex states occurring for dominant J or D, we find that helical states become stable for a range of intermediate values of γ = D/J that depends on the radius and length of the nanotube. Introducing a vorticity order parameter to better characterize helical and vortex states, we find the pseudo-critical temperatures for the transitions between these states and we establish the magnetic phase diagrams of their stability regions as a function of the nanotube aspect ratio. Comparison of the energy of the states obtained by simulation with those of simpler theoretical structures that interpolate continuously between them, reveals a high degree of metastability of the helical structures that might be relevant for their reversal modes.

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“…Recently [19,20], the evolution of the equilibrium magnetization states that exist in soft magnetic nanotubes has been studied as a function of their geometrical, anisotropy and material parameters using numerical simulations. Theoretical studies of magnetic nanotubes have been recently conducted [19][20][21][22]; for example, the influence of an applied external magnetic field on magnetic nanotubes as a function their geometry for other properties, such as magnetization, was studied by E. Konstantinova using the Monte Carlo method and the Heisenberg model [23]. However, the magnetotransport properties of these structures require a broader understanding and further analysis.…”

Section: Introductionmentioning

confidence: 99%