Temperature-dependent magnetization reversal process and coercivity mechanism in Nd-Fe-B hot-deformed magnets

2015 ◽  
Vol 118 (22) ◽  
pp. 223903 ◽  
Author(s):  
Satoshi Okamoto ◽  
Ryota Goto ◽  
Nobuaki Kikuchi ◽  
Osamu Kitakami ◽  
Takahiro Akiya ◽  
...  
Keyword(s):  
Magnetization Reversal ◽  
Temperature Dependent ◽  
Reversal Process ◽  
Coercivity Mechanism ◽  
Temperature Dependent Magnetization ◽  
Magnetization Reversal Process

scholarly journals Coercivity Mechanism and Magnetization Reversal in Anisotropic Ce-(Y)-Pr-Fe-B Films

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4680
Author(s):  
Jun Ma ◽  
Xiaotian Zhao ◽  
Wei Liu ◽  
Yang Li ◽  
Long Liu ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Rare Earths ◽  
Magnetization Reversal ◽  
Magnetic Films ◽  
Nucleation Mechanism ◽  
Magnetic Domains ◽  
Reversal Process ◽  
Heating Treatment ◽  
Coercivity Mechanism ◽  
Magnetization Reversal Process

In this study, the magnetic properties, coercivity mechanism, and magnetization reversal process were investigated for Ce-(Y)-Pr-Fe-B films. After the addition of Y and subsequent heating treatment, the formations of REO (RE ≡ Ce and Pr) and REFe2 (RE ≡ rare earths) phases are inhibited, and the microstructure of Ce-Y-Pr-Fe-B film is optimized. Meanwhile, the coercivity and the squareness of the hysteresis loop are significantly improved. The coercivity mechanism of Ce-Y-Pr-Fe-B film is determined to be a mixture of nucleation and pinning mechanisms, but dominated by the nucleation mechanism. The demagnetization results show that the nucleation of reversal magnetic domains leads to irreversible reversal. Our results are helpful to understand the coercivity mechanism and magnetization reversal of permanent magnetic films with multi-main phases.

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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