Magnetization reversal process and magnetic relaxation of self-assembledFe3Ptnanowire arrays with different diameters: Experiment and micromagnetic simulations

2007 ◽  
Vol 75 (6) ◽  
Author(s):  
Jian-Hua Gao ◽  
Da-Li Sun ◽  
Qing-Feng Zhan ◽  
Wei He ◽  
Zhao-Hua Cheng
Keyword(s):  
Magnetization Reversal ◽  
Magnetic Relaxation ◽  
Micromagnetic Simulations ◽  
Reversal Process ◽  
Different Diameters ◽  
Magnetization Reversal Process

scholarly journals Magnetization Reversal in Concave Iron Nano-Superellipses

2021 ◽  
Vol 6 (2) ◽  
pp. 17
Author(s):  
Emre Öncü ◽  
Andrea Ehrmann
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Magnetization Reversal ◽  
Hysteresis Loops ◽  
Strong Impact ◽  
Research Groups ◽  
Micromagnetic Simulations ◽  
Magnetic Nanodots ◽  
Reversal Process ◽  
Magnetization Reversal Process

Square magnetic nanodots can show intentional or undesired shape modifications, resulting in superellipses with concave or convex edges. Some research groups also concentrated on experimentally investigating or simulating concave nano-superellipses, sometimes called magnetic astroids due to their similarity to the mathematical shape of an astroid. Due to the strong impact of shape anisotropy in nanostructures, the magnetization-reversal process including coercive and reversibility fields can be expected to be different in concave or convex superellipses than that in common squares. Here, we present angle-dependent micromagnetic simulations on magnetic nanodots with the shape of concave superellipses. While magnetization reversal occurs via meander states, horseshoe states or the 180° rotation of magnetization for the perfect square, depending on the angle of the external magnetic field, more complicated states occur for superellipses with strong concaveness. Even apparently asymmetric hysteresis loops can be found along the hard magnetization directions, which can be attributed to measuring minor loops since the reversibility fields become much larger than the coercive fields.

scholarly journals Subsystem domination influence on magnetization reversal in designed magnetic patterns in ferrimagnetic Tb/Co multilayers

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Łukasz Frąckowiak ◽  
Feliks Stobiecki ◽  
Gabriel David Chaves-O’Flynn ◽  
Maciej Urbaniak ◽  
Marek Schmidt ◽  
...  
Keyword(s):  
Domain Wall ◽  
Magnetization Reversal ◽  
Domain Walls ◽  
Compensation Point ◽  
Relative Sign ◽  
Reversal Process ◽  
Effective Magnetization ◽  
Domain Wall Propagation ◽  
Characteristic Features ◽  
Magnetization Reversal Process

AbstractRecent results showed that the ferrimagnetic compensation point and other characteristic features of Tb/Co ferrimagnetic multilayers can be tailored by He+ ion bombardment. With appropriate choices of the He+ ion dose, we prepared two types of lattices composed of squares with either Tb or Co domination. The magnetization reversal of the first lattice is similar to that seen in ferromagnetic heterostructures consisting of areas with different switching fields. However, in the second lattice, the creation of domains without accompanying domain walls is possible. These domain patterns are particularly stable because they simultaneously lower the demagnetizing energy and the energy associated with the presence of domain walls (exchange and anisotropy). For both lattices, studies of magnetization reversal show that this process takes place by the propagation of the domain walls. If they are not present at the onset, the reversal starts from the nucleation of reversed domains and it is followed by domain wall propagation. The magnetization reversal process does not depend significantly on the relative sign of the effective magnetization in areas separated by domain walls.

Magnetization reversal process in a nanoscale Fe/FeOxide granular system

2004 ◽  
Vol 272-276 ◽  
pp. E1185-E1187
Author(s):  
L Del Bianco ◽  
D Fiorani ◽  
A.M Testa ◽  
E Bonetti ◽  
L Pasquini
Keyword(s):  
Magnetization Reversal ◽  
Granular System ◽  
Reversal Process ◽  
Magnetization Reversal Process

Magnetization reversal process in elliptical Permalloy nanodots

2006 ◽  
Vol 515 (2) ◽  
pp. 727-730 ◽  
Author(s):  
F. Carace ◽  
P. Vavassori ◽  
G. Gubbiotti ◽  
S. Tacchi ◽  
M. Madami ◽  
...  
Keyword(s):  
Magnetization Reversal ◽  
Reversal Process ◽  
Magnetization Reversal Process

Magnetization Reversal Process of Single Crystal α-Fe Containing a Nonmagnetic Particle

2015 ◽  
Vol 32 (6) ◽  
pp. 067502
Author(s):  
Yi Li ◽  
Ben Xu ◽  
Shen-Yang Hu ◽  
Yu-Lan Li ◽  
Qiu-Lin Li ◽  
...  
Keyword(s):  
Single Crystal ◽  
Magnetization Reversal ◽  
Reversal Process ◽  
Magnetization Reversal Process

Tuning the coercive field by controlling the magnetization reversal process in permalloy modulated nanowires

2020 ◽  
Vol 512 ◽  
pp. 167045
Author(s):  
Guidobeth Sáez ◽  
Eduardo Cisternas ◽  
Pablo Díaz ◽  
Eugenio E. Vogel ◽  
Juan Pablo Burr ◽  
...  
Keyword(s):  
Magnetization Reversal ◽  
Coercive Field ◽  
Reversal Process ◽  
Magnetization Reversal Process
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