Optimal Control of Magnetization Reversal in a Monodomain Particle by Means of Applied Magnetic Field

We have investigated the low-temperature magnetoresistive properties of a thin epitaxial Pd0.92Fe0.08 film at different directions of the current and the applied magnetic field. The obtained experimental results are well described within an assumption of a single-domain magnetic state of the film. In a wide range of the appled field directions, the magnetization reversal proceeds in two steps via the intermediate easy axis. An epitaxial heterostructure of two magnetically separated ferromagnetic layers, Pd0.92Fe0.08/Ag/Pd0.96Fe0.04, was synthesized and studied with the dc magnetometry. Its magnetic configuration diagram has been constructed and the conditions have been determined for a controllable switching between stable parallel, orthogonal, and antiparallel arrangements of magnetic moments of the layers.

Download Full-text

Magnetization reversal process at low applied magnetic field in a Co-rich amorphous wire

Physica B Condensed Matter ◽

10.1016/j.physb.2003.08.071 ◽

2004 ◽

Vol 343 (1-4) ◽

pp. 369-373 ◽

Cited By ~ 5

Author(s):

V. Zhukova ◽

A.P. Zhukov ◽

N.A. Usov ◽

J.M. Blanco ◽

J. González

Keyword(s):

Magnetic Field ◽

Applied Magnetic Field ◽

Magnetization Reversal ◽

Amorphous Wire ◽

Reversal Process ◽

Magnetization Reversal Process

Download Full-text

Anti-function solution of uniaxial anisotropic Stoner-Wohlfarth model

Chinese Physics B ◽

10.1088/1674-1056/ac401e ◽

2021 ◽

Author(s):

Kun Zheng ◽

Yu Miao ◽

Tong Li ◽

Shuang-Long Yang ◽

Li Xi ◽

...

Keyword(s):

Magnetic Field ◽

Applied Magnetic Field ◽

Magnetization Reversal ◽

Analytic Solution ◽

Hysteresis Loops ◽

Anisotropy Field ◽

Dipole Interaction ◽

Trigonometric Function ◽

Switching Field ◽

Function Solution

Abstract The anti-trigonometric function is used to strictly solve the uniaxial anisotropic Stoner-Wohlfarth (SW) model, which can obtain the relation of the angle α (θ) between the magnetization (the anisotropy field) and the applied magnetic field. Using this analytic solution, the hysteresis loops of uniaxial anisotropic SW particles magnetized in typical directions could be numerically calculated. Then, the hysteresis loops are obtained in randomly distributed SW particle ensembles while ignoring the dipole interaction among them with the analytic solution. Finally, the correctness of the analytic solution is verified by the exact solutions of remanence, switching field, and coercivity from SW model. The analytic solution provides an important reference for understanding the magnetizing and magnetization reversal processes of magnetic materials.

Download Full-text

Non-volatile electrically-driven repeatable magnetization reversal with no applied magnetic field

Nature Communications ◽

10.1038/ncomms2398 ◽

2013 ◽

Vol 4 (1) ◽

Cited By ~ 92

Author(s):

M. Ghidini ◽

R. Pellicelli ◽

J.L. Prieto ◽

X. Moya ◽

J. Soussi ◽

...

Keyword(s):

Magnetic Field ◽

Applied Magnetic Field ◽

Magnetization Reversal

Download Full-text

Magnetization reversal in crossed double elliptic permalloy nanodisks studied by micromagnetic simulation

International Journal of Modern Physics B ◽

10.1142/s0217979218501564 ◽

2018 ◽

Vol 32 (13) ◽

pp. 1850156

Author(s):

Amaresh Chandra Mishra ◽

R. Giri

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Applied Magnetic Field ◽

Magnetization Reversal ◽

Major Axis ◽

Vortex State ◽

Micromagnetic Simulation ◽

Minor Axis ◽

Semi Major Axis ◽

Saturation State

The remanent state of elliptical permalloy nanodisks depends on the orientation of the applied magnetic field with respect to the major and minor axes of the nanodisks [A. C. Mishra, Int. J. Mod. Phys. B 30, 1650192 (2016)]. The remanent state is usually an onion state if the external magnetic field is along the major axis, and is a vortex state if the external magnetic field is along the minor axis. In this work, we have analyzed the magnetization reversal of a crossed elliptic disk of permalloy using micromagnetic simulation. This is a new shape where two identical elliptic disks with semi-major axis of length a and semi-minor axis of length b intersect such that they are perpendicular to each other. If the value of b is very close to that of a, then the remanent state is a near saturation state. As the ratio a/b goes down, new complex remanent states are observed. The hysteresis loss is found to be decreased gradually with the increment of b for a given value of b.

Download Full-text

Micromagnetic Simulation of Asymmetrical CoFe Nanorings

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.538-541.529 ◽

2012 ◽

Vol 538-541 ◽

pp. 529-533

Author(s):

Zhen Gang Guo ◽

Li Qing Pan ◽

Hong Mei Qiu ◽

Xue Dan Zhao ◽

Li Hong Yang

Keyword(s):

Magnetic Field ◽

Domain Wall ◽

Applied Magnetic Field ◽

Magnetization Reversal ◽

Vortex State ◽

Micromagnetic Simulation ◽

Micromagnetic Simulations ◽

Vortex States

Domain wall motions and magnetization reversal processes in the nanoscale asymmetrical Co50Fe50rings have been studied using micromagnetic simulations. The results reveal that the switching fields and the plateau width of vortex state can be tuned through changing the asymmetrical parameter of magnetic nanorings. The chirality of vortex states can be easily controlled by the orientation of the applied magnetic field.

Download Full-text