scholarly journals Fine tuning of ferromagnet/antiferromagnet interface magnetic anisotropy for field-free switching of antiferromagnetic spins

Nanoscale ◽  
2020 ◽  
Vol 12 (35) ◽  
pp. 18091-18095
Author(s):  
M. Ślęzak ◽  
P. Dróżdż ◽  
W. Janus ◽  
H. Nayyef ◽  
A. Kozioł-Rachwał ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Fine Tuning ◽  
Uniform Thickness ◽  
Bilayer System ◽  
Magnetic States

We show that in a uniform thickness NiO(111)/Fe(110) epitaxial bilayer system, at given temperature near 300 K, two magnetic states with orthogonal spin orientations can be stabilized in antiferromagnetic NiO.

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.

scholarly journals Correction: Fine tuning of ferromagnet/antiferromagnet interface magnetic anisotropy for field-free switching of antiferromagnetic spins

Nanoscale ◽  
2020 ◽  
Vol 12 (37) ◽  
pp. 19477-19477
Author(s):  
M. Ślęzak ◽  
P. Dróżdż ◽  
W. Janus ◽  
H. Nayyef ◽  
A. Kozioł-Rachwał ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Fine Tuning

Correction for ‘Fine tuning of ferromagnet/antiferromagnet interface magnetic anisotropy for field-free switching of antiferromagnetic spins’ by M. Ślęzak et al., Nanoscale, 2020, DOI: 10.1039/d0nr04193a.

Fine-tuning the type of equatorial donor atom in pentagonal bipyramidal Dy(iii) complexes to enhance single-molecule magnet properties

2019 ◽  
Vol 48 (43) ◽  
pp. 16384-16394 ◽  
Author(s):  
Haipeng Wu ◽  
Min Li ◽  
Bing Yin ◽  
Zhengqiang Xia ◽  
Hongshan Ke ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Single Molecule ◽  
Electronic Effect ◽  
Fine Tuning ◽  
Donor Atom ◽  
Single Molecule Magnet

Upon fine-tuning an equatorial donor, the electronic effect is implemented to significantly enhance magnetic anisotropy in pentagonal bipyramidal DyIII complexes.

Fine-tuning of the molecular structures and magnetic anisotropy analysis of two mononuclear dysprosium–sulfur complexes

2018 ◽  
Vol 95 ◽  
pp. 82-85 ◽  
Author(s):  
Shan-Shan Liu ◽  
Jian-Ming Zhao ◽  
Sheng Deng ◽  
Jin Xiong ◽  
Meng-Fei Yang ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Molecular Structures ◽  
Fine Tuning

Modulation of the magnetic anisotropy of octahedral cobalt(ii) single-ion magnets by fine-tuning the axial coordination microenvironment

2019 ◽  
Vol 6 (3) ◽  
pp. 848-856 ◽  
Author(s):  
Yuewei Wu ◽  
Danian Tian ◽  
Jesús Ferrando-Soria ◽  
Joan Cano ◽  
Lei Yin ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Easy Plane ◽  
Fine Tuning ◽  
Donor Ligands ◽  
Axial Coordination

The alteration of the axial N-donor ligands leads to two octahedral Co(ii) SIMs with varying easy-plane magnetic anisotropies and dynamic magnetic behaviors.

Fractal Analysis of Skyrmions Generated by Field-Assisted Fine-tuning of Magnetic Anisotropy

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Yao Zhang ◽  
Guy Dubuis ◽  
Tane Butler ◽  
Simon Granville
Keyword(s):  
Magnetic Anisotropy ◽  
Fractal Analysis ◽  
Fine Tuning

Enhanced magnetic anisotropy in a tellurium-coordinated cobalt single-ion magnet

2017 ◽  
Vol 4 (4) ◽  
pp. 701-705 ◽  
Author(s):  
Xiao-Nan Yao ◽  
Mu-Wen Yang ◽  
Jin Xiong ◽  
Jia-Jia Liu ◽  
Chen Gao ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Fine Tuning ◽  
Ligand Field

Fine-tuning of the ligand field of a series of four-coordinate Co(ii) SIMs, yielding the first tellurium-coordinated SIM.

scholarly journals Reversible switching of magnetic states by electric fields in nitrogenized-divacancies graphene decorated by tungsten atoms

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Gui-Xian Ge ◽  
Hai-Bin Sun ◽  
Yan Han ◽  
Feng-Qi Song ◽  
Ji-Jun Zhao ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Data Storage ◽  
Electric Fields ◽  
High Performance ◽  
Occupation Number ◽  
Magnetic Storage ◽  
Magnetic Anisotropy Energy ◽  
Magnetic States ◽  
Storage Units ◽  
Promising Avenue

Abstract Magnetic graphene-based materials have shown great potential for developing high-performance electronic devices at sub-nanometer such as spintronic data storage units. However, a significant reduction of power consumption and great improvement of structural stability are needed before they can be used for actual applications. Based on the first-principles calculations, here we demonstrate that the interaction between tungsten atoms and nitrogenized-divacancies (NDVs) in the hybrid W@NDV-graphene can lead to high stability and large magnetic anisotropy energy (MAE). More importantly, reversible switching between different magnetic states can be implemented by tuning the MAE under different electric fields and very low energy is consumed during the switching. Such controllable switching of magnetic states is ascribed to the competition between the tensile stain and orbital magnetic anisotropy, which originates from the change in the occupation number of W-5d orbitals under the electric fields. Our results provide a promising avenue for developing high-density magnetic storage units or multi-state logical switching devices with ultralow power at sub-nanometer.

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