Direct observation of dynamical magnetization reversal process governed by shape anisotropy in single NiFe2O4 nanowire

Nanoscale ◽  
2018 ◽  
Vol 10 (21) ◽  
pp. 10123-10129 ◽  
Author(s):  
Junli Zhang ◽  
Shimeng Zhu ◽  
Hongli Li ◽  
Liu Zhu ◽  
Yang Hu ◽  
...  
Keyword(s):  
Direct Observation ◽  
Magnetization Reversal ◽  
Magnetic Behavior ◽  
Shape Anisotropy ◽  
Reversal Process ◽  
Magnetization Reversal Process

Direct observation of dynamical magnetization reversal process in a NiFe2O4 nanowire reveals the domination of shape anisotropy on its magnetic behavior.

scholarly journals Two-Step Magnetization Reversal FORC Fingerprint of Coupled Bi-Segmented Ni/Co Magnetic Nanowire Arrays

Nanomaterials ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 548 ◽  
Author(s):  
Javier García Fernández ◽  
Víctor Vega Martínez ◽  
Andy Thomas ◽  
Víctor de la Prida Pidal ◽  
Kornelius Nielsch
Keyword(s):  
Magnetization Reversal ◽  
Nanowire Array ◽  
Magnetic Domain ◽  
Magnetic Behavior ◽  
Relative Difference ◽  
Nanowire Arrays ◽  
Magnetic Interactions ◽  
Magnetic Configuration ◽  
Reversal Process ◽  
Magnetization Reversal Process

First Order Reversal Curve (FORC) analysis has been established as an appropriate method to investigate the magnetic interactions among complex ferromagnetic nanostructures. In this work, the magnetization reversal mechanism of bi-segmented nanowires composed by long Co and Ni segments contacted at one side was investigated, as a model system to identify and understand the FORC fingerprint of a two-step magnetization reversal process. The resulting hysteresis loop of the bi-segmented nanowire array exhibits a completely different magnetic behavior than the one expected for the magnetization reversal process corresponding to each respective Co and Ni nanowire arrays, individually. Based on the FORC analysis, two possible magnetization reversal processes can be distinguished as a consequence of the ferromagnetic coupling at the interface between the Ni and Co segments. Depending on the relative difference between the magnetization switching fields of each segment, the softer magnetic phase induces the switching of the harder one through the injection and propagation of a magnetic domain wall when both switching fields are comparable. On the other hand, if the switching fields values differ enough, the antiparallel magnetic configuration of nanowires is also possible but energetically unfavorable, thus resulting in an unstable magnetic configuration. Making use of the different temperature dependence of the magnetic properties for each nanowire segment with different composition, one of the two types of magnetization reversal is favored, as demonstrated by FORC analyses.

Effect of shape anisotropy on the magnetization reversal process of (Ga,Mn)As ferromagnetic semiconductors

2008 ◽  
Vol 103 (7) ◽  
pp. 07D119 ◽  
Author(s):  
Taehee Yoo ◽  
Dongyun Shin ◽  
Jungtaek Kim ◽  
Hyungchan Kim ◽  
Sanghoon Lee ◽  
...  
Keyword(s):  
Magnetization Reversal ◽  
Shape Anisotropy ◽  
Ferromagnetic Semiconductors ◽  
Reversal Process ◽  
Magnetization Reversal Process

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
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