scholarly journals The role of uniaxial magnetic anisotropy distribution on domain wall tilting in amorphous glass-coated microwires

2020 ◽  
Vol 127 (19) ◽  
pp. 193905
Author(s):  
Kornel Richter ◽  
André Thiaville ◽  
Rastislav Varga ◽  
Jeffrey McCord
Keyword(s):  
Domain Wall ◽  
Magnetic Anisotropy ◽  
Uniaxial Magnetic Anisotropy ◽  
Amorphous Glass

Deciphering the influence of structural distortions on the uniaxial magnetic anisotropy of pentagonal bipyramidal Ni(ii) complexes

2019 ◽  
Vol 55 (77) ◽  
pp. 11547-11550
Author(s):  
Mamon Dey ◽  
Prashurya Pritam Mudoi ◽  
Anup Choudhury ◽  
Bipul Sarma ◽  
Nayanmoni Gogoi
Keyword(s):  
Magnetic Anisotropy ◽  
Structural Distortion ◽  
Uniaxial Magnetic Anisotropy ◽  
Simple Strategy ◽  
Structural Distortions

Role of structural distortion on the uniaxial magnetic anisotropy of pentagonal bipyramidal Ni(ii) complexes is explored. A simple strategy to enhance the uniaxial magnetic anisotropy in pentagonal bipyramidal Ni(ii) complexes is proposed.

One Domain Wall Hysteresis Model for Spherical Grain

2012 ◽  
Vol 727-728 ◽  
pp. 140-145 ◽  
Author(s):  
Marcos Flavio de Campos ◽  
José Adilson de Castro
Keyword(s):  
Grain Size ◽  
Domain Wall ◽  
Coercive Force ◽  
Magnetic Anisotropy ◽  
Magnetic Materials ◽  
Legendre Polynomials ◽  
Ferromagnetic Materials ◽  
Hysteresis Model ◽  
Uniaxial Magnetic Anisotropy ◽  
System A

The high uniaxial magnetic anisotropy makes phases like Nd2Fe14B, Sm2Co17, SmCo5or BaFe12O19are very suitable as hard permanent magnetic materials. In the case of ferromagnetic materials, the global magnetostatic energy changes, according to the domain wall configuration. The simplest case to be studied is that of spherical grain with only one domain wall, in phases with uniaxial symmetry. The magnetostic energy in this system is calculated by means of Legendre polynomials. Studying the maximums and minimums of energy in this system, a simple hysteresis model can be developed. The model provides insight about the dependence of the coercive force on the grain size.

Uniaxial magnetic anisotropy in Fe/GaAs(001): Role of magnetoelastic interactions

2012 ◽  
Vol 86 (5) ◽  
Author(s):  
Günther Bayreuther ◽  
Jörg Premper ◽  
Matthias Sperl ◽  
Dirk Sander
Keyword(s):  
Magnetic Anisotropy ◽  
Uniaxial Magnetic Anisotropy

scholarly journals Characteristics of Domain Wall Motion in CoFeB Films with Inplane Uniaxial Magnetic Anisotropy

2008 ◽  
Vol 32 (3) ◽  
pp. 317-320 ◽  
Author(s):  
T. Watanabe ◽  
N. Kakuho ◽  
T. Furuno ◽  
M. Ohkoshi ◽  
M. Munakata
Keyword(s):  
Domain Wall ◽  
Magnetic Anisotropy ◽  
Wall Motion ◽  
Domain Wall Motion ◽  
Uniaxial Magnetic Anisotropy

Magnetization dynamics of irradiation-fabricated perpendicularly magnetized dots inside a softer magnetic matrix

2003 ◽  
Vol 777 ◽  
Author(s):  
T. Devolder ◽  
M. Belmeguenai ◽  
C. Chappert ◽  
H. Bernas ◽  
Y. Suzuki
Keyword(s):  
Domain Wall ◽  
Magnetic Anisotropy ◽  
Magnetization Reversal ◽  
Ion Irradiation ◽  
Magnetic Nanostructures ◽  
Magnetic Storage ◽  
Exchange Field ◽  
Static Magnetization ◽  
Specific Domain ◽  
Helium Ion

AbstractGlobal Helium ion irradiation can tune the magnetic properties of thin films, notably their magneto-crystalline anisotropy. Helium ion irradiation through nanofabricated masks can been used to produce sub-micron planar magnetic nanostructures of various types. Among these, perpendicularly magnetized dots in a matrix of weaker magnetic anisotropy are of special interest because their quasi-static magnetization reversal is nucleation-free and proceeds by a very specific domain wall injection from the magnetically “soft” matrix, which acts as a domain wall reservoir for the “hard” dot. This guarantees a remarkably weak coercivity dispersion. This new type of irradiation-fabricated magnetic device can also be designed to achieve high magnetic switching speeds, typically below 100 ps at a moderate applied field cost. The speed is obtained through the use of a very high effective magnetic field, and high resulting precession frequencies. During magnetization reversal, the effective field incorporates a significant exchange field, storing energy in the form of a domain wall surrounding a high magnetic anisotropy nanostructure's region of interest. The exchange field accelerates the reversal and lowers the cost in reversal field. Promising applications to magnetic storage are anticipated.

scholarly journals Route towards efficient magnetization reversal driven by voltage control of magnetic anisotropy

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Roxana-Alina One ◽  
Hélène Béa ◽  
Sever Mican ◽  
Marius Joldos ◽  
Pedro Brandão Veiga ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Random Access ◽  
Low Power Consumption ◽  
Surface Anisotropy ◽  
Magnetization Dynamics ◽  
Storage Density ◽  
Switching Regime ◽  
Major Interest ◽  
Out Of Plane

AbstractThe voltage controlled magnetic anisotropy (VCMA) becomes a subject of major interest for spintronics due to its promising potential outcome: fast magnetization manipulation in magnetoresistive random access memories with enhanced storage density and very low power consumption. Using a macrospin approach, we carried out a thorough analysis of the role of the VCMA on the magnetization dynamics of nanostructures with out-of-plane magnetic anisotropy. Diagrams of the magnetization switching have been computed depending on the material and experiment parameters (surface anisotropy, Gilbert damping, duration/amplitude of electric and magnetic field pulses) thus allowing predictive sets of parameters for optimum switching experiments. Two characteristic times of the trajectory of the magnetization were analyzed analytically and numerically setting a lower limit for the duration of the pulses. An interesting switching regime has been identified where the precessional reversal of magnetization does not depend on the voltage pulse duration. This represents a promising path for the magnetization control by VCMA with enhanced versatility.

Spin-Lattice Coupling and Peculiarities of Magnetic Behavior of Ferrimagnetic Ludwigites Mn0.52+M1.52+Mn3+BO5(M=Cu, Ni)

2015 ◽  
Vol 233-234 ◽  
pp. 133-136 ◽  
Author(s):  
Leonard Bezmaternykh ◽  
Evgeniya Moshkina ◽  
Evgeniy Eremin ◽  
Maxim Molokeev ◽  
Nikita Volkov ◽  
...  
Keyword(s):  
Temperature Field ◽  
Low Temperature ◽  
Magnetic Anisotropy ◽  
Single Crystals ◽  
Magnetic Behavior ◽  
Temperature Hysteresis ◽  
Spin Lattice ◽  
Field Magnetization ◽  
Lattice Coupling

Temperature-field and orientational magnetization dependences of single crystals were measured. Both samples demonstrate significant field-depending temperature hysteresis and low-temperature counter field magnetization. The correlation of orientational dependences of these effects and magnetic anisotropy is analyzed; the role of spin-lattice interactions is discussed.

Large Negative Uniaxial Magnetic Anisotropy in Epitaxially Strained Nickel Ferrite Films

2017 ◽  
Vol 53 (11) ◽  
pp. 1-4 ◽  
Author(s):  
Mitsuharu Matsumoto ◽  
Sonia Sharmin ◽  
Jun-ichiro Inoue ◽  
Eiji Kita ◽  
Hideto Yanagihara
Keyword(s):  
Magnetic Anisotropy ◽  
Nickel Ferrite ◽  
Uniaxial Magnetic Anisotropy ◽  
Ferrite Films
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