Behavior of domain structure in a Co/Ag superlattice with dispersion of magnetic anisotropy

JETP Letters ◽  
2000 ◽  
Vol 71 (10) ◽  
pp. 430-433
Author(s):  
L. M. Dedukh ◽  
V. N. Matveev ◽  
V. I. Nikitenko
Keyword(s):  
Magnetic Anisotropy ◽  
Domain Structure

Interfacial control of domain structure and magnetic anisotropy in La0.67Sr0.33MnO3 manganite heterostructures

2021 ◽  
Vol 104 (12) ◽  
Author(s):  
Da Lan ◽  
Pingfan Chen ◽  
Chao Liu ◽  
Xiaohan Wu ◽  
Ping Yang ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Domain Structure

MAGNETIC ELEMENTS OF NEURAL NETWORKS. PROPERTIES OF MAGNETIC INHOMOGENEITIES IN RESTRICTED GEOMETRIES

2021 ◽  
Vol 0 (1) ◽  
pp. 81-86
Author(s):  
A.R. MINIBAEVA ◽  
◽  
Z.V. GAREEVA ◽  
Keyword(s):  
Neural Network ◽  
Neural Networks ◽  
Magnetic Anisotropy ◽  
Domain Structure ◽  
Magnetic State ◽  
Magnetic Nanostructures ◽  
External Factors ◽  
Magnetic Elements ◽  
Magnetic States ◽  
Moriya Interaction

This paper discusses the prospects for using magnetic nanostructures as elements of neural networks. At present neural network learning programs are actively used in analyzing and processing large data arrays; however, the development of computer technologies based on the neural network principle still remains open. Possibilities for using magnetic elements as physical carriers of information bits in these systems attract much attention from researchers and technologists due to the presence of several easily controlled parameters (order parameter) in the magnetic system, possibilities for the dimensionality reduction in magnetic elements by using magnetic nanostructures (domain boundaries, vortices, ckyrmions), superquick switching between magnetic states and some other factors. One of the key aspects of research in this regard is to determine basic controlled magnetic parameters in restricted geometries and to identify ways of controlling these parameters through internal and external factors. The paper presents a research on the magnetic ground state in restricted geometries. It deals with the magnetic state rebuilding in the system under changes in both external factors (applied magnetic field, sample dimensions) and internal ones (magnetic anisotropy constant, Dzyaloshinskii-Moriya interaction constant). Calculations were performed within the framework of micromagnetic modelling using the Object Oriented MicroMagnetic Framework ( OOMMF) sogtware. It is shown that the anisotropic exchange interaction (Dzyaloshinskii-Moriya interaction) has a significant effect on the magnetization distribution in restricted geometries. Namely, when changing the value of the Dzyaloshinskii-Moriya constant in the system with uniaxial magnetic anisotropy there is a series of phase transitions observed between magnetic states of different types: transitions from the homogenous magnetic state into the skyrmion-type vortex state (domain structure with the skyrmion-type unidomain state) with subsequent domain structure reversal when changing the value of the Dzyaloshinskii-Moriya constant. In the case of magnetic anisotropy of easy -axis type, chirality and properties of the structures in question do not depend on the constant symbol of the Dzyaloshinskii-Moriya interaction.

Thickness-dependence of magnetic anisotropy and domain structure in Ni thin films grown on a PMN-PT substrate

2020 ◽  
Vol 29 (9) ◽  
pp. 095019 ◽  
Author(s):  
Yuanzhi Xiang ◽  
Kun Liang ◽  
Scott Keller ◽  
Michael Guevara ◽  
Michael Sheng ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Anisotropy ◽  
Domain Structure ◽  
Thickness Dependence

The influence of magnetic anisotropy caused by laser treatment on domain structure of FINEMET

2002 ◽  
Vol 52 (S1) ◽  
pp. A105-A108
Author(s):  
A. Zeleňáková ◽  
P. Kollár ◽  
M. Kužmiñski ◽  
W. Riehemann
Keyword(s):  
Magnetic Anisotropy ◽  
Laser Treatment ◽  
Domain Structure

Domain Structures in Films with Combined Magnetic Anisotropy. Two-Dimensional Simulation

2014 ◽  
Vol 215 ◽  
pp. 409-414 ◽  
Author(s):  
Mikhail N. Dubovik ◽  
Vladimir V. Zverev ◽  
Boris N. Filippov
Keyword(s):  
Magnetic Anisotropy ◽  
Thick Film ◽  
Domain Structure ◽  
Uniaxial Anisotropy ◽  
Anisotropy Constant ◽  
Two Dimensional ◽  
Structure Dependence ◽  
Domain Structures ◽  
New Type ◽  
Dimensional Simulation

The domain structure dependence on the uniaxial anisotropy constant has been considered in a micrometer-thick film by means of the two-dimensional micromagnetic simulation. The film has both uniaxial and tetra-axial magnetic anisotropies. The new type domain structures and walls caused by the tetra-axial anisotropy presence are predicted.

Magnetic Anisotropy of Sm(Co0.68Fe0.22Cu0.08Zr0.02)7.7 Ribbons Produced by Melt Spinning

2002 ◽  
Vol 17 (3) ◽  
pp. 648-652 ◽  
Author(s):  
A-Ru Yan ◽  
Zhi-Gang Sun ◽  
Baoshan Han ◽  
Bao-Gen Shen
Keyword(s):  
Magnetic Anisotropy ◽  
Domain Structure ◽  
Melt Spinning ◽  
Permanent Magnets ◽  
Dendritic Structure ◽  
Axis Orientation ◽  
Needle Size ◽  
Ribbon Plane ◽  
Field Parallel ◽  
Melt Spun

A high degree of texture was observed in melt-spun Sm(Co0.68Fe0.22Cu0.08Zr0.02)7.7 ribbons prepared by single-roller melt spinning at low wheel speed; their easy magnetization axis was parallel to the ribbon plane. Magnetization studies showed an obvious magnetic anisotropy and a 90% higher remanance in ribbons for the field parallel to the longitudinal direction (8.5 kGs) than that for the field parallel to the wide direction (4.4 kGs); this was attributed to a dendritic structure of needle-size grains (2–3 × 10–40 μm) with their long axis parallel to the ribbon plane. This texture allowed the development of a new process for producing anisotropic permanent magnets. The domain structure was studied by magnetic-force microscope. A highly ordered and strip-shaped magnetic domain structure was observed on the surface of the ribbons. This was due to the preference for tetragonal c-axis orientation parallel to the surface of melt-spun ribbons. We calculated the domain wall energy γ and critical single-domain particle size Dc of Sm(Co0.68Fe0.22Cu0.08Zr0.02)7.7 ribbons.

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