Anisotropy pinning of domain walls in a soft amorphous magnetic material

1991 ◽  
Vol 27 (4) ◽  
pp. 3678-3689 ◽  
Author(s):  
R. Schafer ◽  
W.K. Ho ◽  
J. Yamasaki ◽  
A. Hubert ◽  
F.B. Humphrey
Keyword(s):  
Magnetic Material ◽  
Domain Walls ◽  
Pinning Of Domain Walls ◽  
Amorphous Magnetic Material

Anistropy pinning of domain walls in soft magnetic material

1989 ◽  
Author(s):  
Wing Kei Ho ◽  
R. Schafer ◽  
J. Yamasaki ◽  
A. Hubert ◽  
F. Humphrey
Keyword(s):  
Magnetic Material ◽  
Domain Walls ◽  
Soft Magnetic Material ◽  
Soft Magnetic ◽  
Pinning Of Domain Walls

scholarly journals Information storage in permalloy modulated magnetic nanowires

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Guidobeth Sáez ◽  
Pablo Díaz ◽  
Eduardo Cisternas ◽  
Eugenio E. Vogel ◽  
Juan Escrig
Keyword(s):  
Magnetic Material ◽  
Phase Diagram ◽  
Magnetic Fields ◽  
Domain Walls ◽  
Wire Diameter ◽  
Information Storage ◽  
Magnetic Nanowires ◽  
The Wire ◽  
The Stability ◽  
Cylindrical Wire

AbstractA long piece of magnetic material shaped as a central cylindrical wire (diameter $$d=50$$ d = 50 nm) with two wider coaxial cylindrical portions (diameter $$D=90$$ D = 90 nm and thickness $$t=100$$ t = 100 nm) defines a bimodulated nanowire. Micromagnetism is invoked to study the equilibrium energy of the system under the variations of the positions of the modulations along the wire. The system can be thought of as composed of five independent elements (3 segments and 2 modulations) leading to $$2^5=32$$ 2 5 = 32 possible different magnetic configurations, which will be later simplified to 4. We investigate the stability of the configurations depending on the positions of the modulations. The relative chirality of the modulations has negligible contributions to the energy and they have no effect on the stability of the stored configuration. However, the modulations are extremely important in pinning the domain walls that lead to consider each segment as independent from the rest. A phase diagram reporting the stability of the inscribed magnetic configurations is produced. The stability of the system was then tested under the action of external magnetic fields and it was found that more than 50 mT are necessary to alter the inscribed information. The main purpose of this paper is to find whether a prototype like this can be complemented to be used as a magnetic key or to store information in the form of firmware. Present results indicate that both possibilities are feasible.

Effects of geomagnetism and residual magnetism on single sheet testers for amorphous magnetic material

1996 ◽  
Vol 160 ◽  
pp. 177-179 ◽  
Author(s):  
T. Nakata ◽  
M. Nakano ◽  
K. Fujiwara ◽  
K. Muramatsu ◽  
H.L. Zhu ◽  
...  
Keyword(s):  
Magnetic Material ◽  
Single Sheet ◽  
Amorphous Magnetic Material ◽  
Residual Magnetism
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