Low-temperature study of the magnetization reversal and magnetic anisotropy of Fe, Ni, and Co nanowires

Paulus, P.M.; Luìs, Fernando; Kröll, Michael; Schmid, Günter; Jongh, L.J. de

doi:10.1016/s0304-8853(00)00711-3

Cited by 275 publications

(180 citation statements)

References 26 publications

Supporting

Mentioning

159

Contrasting

Order By: Relevance

“…Furthermore, thermal effects ͑reduction of the coercive field and remanence͒ are greatly suppressed by the large volume ͑and the related activation energies͒ of the particles. 10 We show that our arrays of magnetic wires behave exactly as predicted by Preisach-type models, in which the StonerWohlfarth response ͑square hysteresis loop͒ is modified by interactions. This simplifies considerably the interpretation and enables us to draw conclusions with a minimum modeling of the data.…”

Section: Introductionsupporting

confidence: 65%

“…10 Pore diameters D p varied from 50 nm down to 6 nm, i.e., of the same order and even lower than the values of the domain-wall width w ϭ2(A J /K s ) 1/2 , where A J and K s are, respectively, the exchange constant and the shape anisotropy. For the Fe and Ni nanowires, one has w Ӎ6 -8 nm and 22-28 nm, respectively.…”

Section: Introductionmentioning

confidence: 92%

“…The small values observed for the involved activation energy, and its proportionality to the cross section instead of the volume of the wires, confirm such an interpretation. 10 The aim of the present work is to further investigate the manner in which the dipole-dipole interactions modify the Stoner-Wohlfarth magnetic response of a single wire, and whether these interactions determine the distribution of switching fields and, therefore, the overall shape of the macroscopic hysteresis loop. To achieve this, we combine standard bulk magnetization measurements ͓using superconducting quantum interference device ͑SQUID͒ magnetometry͔ with microscopic techniques such as atomic and magnetic force microscopy ͑AFM/MFM͒.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Magnetization reversal of ferromagnetic nanowires studied by magnetic force microscopy

et al. 2003

Self Cite

View full text Add to dashboard Cite

The magnetization reversal of two-dimensional arrays of parallel ferromagnetic Fe nanowires embedded in nanoporous alumina templates has been studied. By combining bulk magnetization measurements ͑supercon-ducting quantum interference device magnetometry͒ with field-dependent magnetic force microscopy ͑MFM͒, we have been able to decompose the macroscopic hysteresis loop in terms of the irreversible magnetic responses of individual nanowires. The latter are found to behave as monodomain ferromagnetic needles, with hysteresis loops displaced ͑asymmetric͒ as a consequence of the strong dipolar interactions between them. The application of field-dependent MFM provides a microscopic method to obtain the hysteresis curve of the array, by simply registering the fraction of up and down magnetized wires as a function of applied field. The observed deviations from the rectangular shape of the macroscopic hysteresis loop of the array can be ascribed to the spatial variation of the dipolar field through the inhomogeneously filled membrane. The system studied proves to be an excellent example of the two-dimensional classical Preisach model, well known from the field of hysteresis modeling and micromagnetism.

show abstract

Section: Introductionsupporting

confidence: 65%

Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Magnetization reversal of ferromagnetic nanowires studied by magnetic force microscopy

et al. 2003

Self Cite

View full text Add to dashboard Cite

show abstract

“…In Ivanov Importantly, the simulations showed the differences between the angular dependence of the nucleation and the coercivity fields Hn and Hc. For large applied field angles, Hc is not equal to Hn in agreement with the experimental data reported by numerous authors (Escrig, 2008;Yang, 2000;Paulus, 2001). Their angular dependence is the same in the range of the applied field angles 0 0 ≤α≤60 0 .…”

Section: Reversal Modes In Cylindrical Nanowiressupporting

confidence: 89%

“…In general the experimental value of the coercivity of the arrays is less than the coercivity of the single NW (Vega, 2012). The experimental loop of the arrays of the NWs with dominated shape anisotropy is inclined [Nielsch, 2001;Paulus, 2001;Pan, 2005;Liu, 2008;Escrig, 2008;Vivas, 2012a;Salem, 2012] and does not show the one step magnetization reversal process as for single NW in the case of the magnetic field applied parallel to the NW axis. Such behavior is also reproduced in micromagnetic simulations.…”

Section: Simulation Of Hysteresis In Individual Nanowires and Nanowirmentioning

confidence: 83%

Micromagnetic simulations of cylindrical magnetic nanowires

Ivanov¹,

Chubykalo‐Fesenko²

2015

Magnetic Nano- And Microwires

View full text Add to dashboard Cite

This chapter reviews micromagnetic simulations of cylindrical magnetic nanowires and their ordered arrays. It starts with the description of the theoretical background of micromagnetism. The chapter discusses main magnetization reversal modes, domain wall types and state diagrams in cylindrical nanowires of different types and sizes. The results on the hysteresis process in individual nanowires and nanowire arrays are also presented.Modeling results are comparing with the experimental ones. The chapter also discusses future trends in nanowires aplications in relation to the simulations, as for example, the current-driven dynamics, spintronics and spincaloritronics. The main micromagnetic programs are presented and discussed together with the corresponding links.

show abstract

Modeling Magnetic Particles

Satoh

2015

Wiley Encyclopedia of Electrical and Electronics Engineering

View full text Add to dashboard Cite

Since there are various strategies in performing simulations at a microscopic level to obtain reliable results, we here discuss the modeling of magnetic particles, simulation techniques, and related tactics such as criterion of particle overlap: the particle overlap will certainly become a serious hurdle to develop a successful and reliable computational code of simulations in treating the motion of magnetic particles in a suspension. One example of simulations based on Brownian dynamics method is shown in order for nonexpert readers to straightforwardly understand how the simulation techniques play an important role in analyzing the microscopic behavior of magnetic particles in an applied magnetic field (as well as a shear flow). In the following sections, we first discuss the modeling of magnetic particles, the different axis systems grasping the particle situations, the criterion of particle overlap, simulation methods of Brownian dynamics and lattice Boltzmann method, and finally application of Brownian dynamics method to magnetic particle suspensions.

show abstract

Low-temperature study of the magnetization reversal and magnetic anisotropy of Fe, Ni, and Co nanowires

Cited by 275 publications

References 26 publications

Magnetization reversal of ferromagnetic nanowires studied by magnetic force microscopy

Magnetization reversal of ferromagnetic nanowires studied by magnetic force microscopy

Micromagnetic simulations of cylindrical magnetic nanowires

Modeling Magnetic Particles

Contact Info

Product

Resources

About