Studies of Magneto-Optical Recording in Multi-Magnetic-Layer Disk by Analytic and Simulating Approaches

1993 ◽  
Vol 313 ◽  
Author(s):  
Yoshiyuki Kawazoe ◽  
Xiao Hu ◽  
Shigeru Honma
Keyword(s):  
Computer Simulation ◽  
Magnetic Properties ◽  
External Field ◽  
Theoretical Estimate ◽  
Magnetic Layer ◽  
Magnetic Coupling ◽  
Optical Recording ◽  
Analytic Approach ◽  
Layer System

ABSTRACTThe effect of magnetic coupling in Multi-layer system is discussed by an analytic approach and computer simulation. The dependence of the enhancement of external field on the magnetic properties of the relevant materials is studied. Comparison between the theoretical estimate, simulation result and experimental observations are presented.

Features of Magnetic Properties and FMR of CoFeZr/Si Layered Nanosystems due to their Inner Structure

2012 ◽  
Vol 190 ◽  
pp. 605-608 ◽  
Author(s):  
Ju. Chekrygina ◽  
A. Devizenko ◽  
Y. Kalinin ◽  
E. Lebedeva ◽  
I. Shipkova ◽  
...  
Keyword(s):  
Computer Simulation ◽  
Magnetic Properties ◽  
Ferromagnetic Resonance ◽  
Magnetic Layer ◽  
Effective Medium ◽  
Interlayer Thickness ◽  
X Ray Diffraction ◽  
X Ray ◽  
Resonance Response ◽  
Glancing Angle

Static magnetic properties, ferromagnetic resonance (FMR) and glancing angle X-ray diffraction spectra (GAXRD) of CoFeZr (tm)/Si (tSi) in multilayer nanosystems were investigated for two groups of the samples characterized by tm = 2 3 nm, tSi = 0.5 5 nm and by tm = 7 12 nm, tSi = 5 13 nm. A computer simulation of GAXRD spectra of multilayer interference structures has been performed taking into account the possibility of silicides formation at metal-Si interfaces. Matter of discussion is the layer and interlayer thickness below which a resonance response corresponds to that of an effective medium rather than of an individual magnetic layer.

Structural diversity and magnetic properties of six ferrocenyl monocarboxylate Mn(ii), Ni(ii) and Co(ii) complexes with 1D aqua, carboxyl or dinuclear hydroxyl bridges

CrystEngComm ◽  
2021 ◽  
Author(s):  
Misbha Rafiq Khan ◽  
Xiaoge Niu ◽  
Tianling Chen ◽  
Yan Liu ◽  
Zhongyi Liu ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Coupling ◽  
Structural Diversity ◽  
Different Types ◽  
Structure Diversity

Six ferrocenyl monocarboxylate Mn(ii), Ni(ii) and Co(ii) complexes with different types of magnetic coupling bridges were synthesized successfully. 1–6 display intriguing structure diversity and magnetic properties.

scholarly journals Exploring the magnetic properties and magnetic coupling in SrFe12O19/Co1-xZnxFe2O4 nanocomposites

2021 ◽  
pp. 168095
Author(s):  
P. Maltoni ◽  
T. Sarkar ◽  
G. Barucca ◽  
G. Varvaro ◽  
D. Peddis ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Coupling

scholarly journals Visualizing atomic structure and magnetism of 2D magnetic insulators via tunneling through graphene

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Zhizhan Qiu ◽  
Matthew Holwill ◽  
Thomas Olsen ◽  
Pin Lyu ◽  
Jing Li ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Deep Understanding ◽  
Magnetic Coupling ◽  
Atomic Scale ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Electronic And Magnetic Properties ◽  
Conducting Path ◽  
Magnetic Insulators ◽  
Quantum Technology

AbstractThe discovery of two-dimensional (2D) magnetism combined with van der Waals (vdW) heterostructure engineering offers unprecedented opportunities for creating artificial magnetic structures with non-trivial magnetic textures. Further progress hinges on deep understanding of electronic and magnetic properties of 2D magnets at the atomic scale. Although local electronic properties can be probed by scanning tunneling microscopy/spectroscopy (STM/STS), its application to investigate 2D magnetic insulators remains elusive due to absence of a conducting path and their extreme air sensitivity. Here we demonstrate that few-layer CrI3 (FL-CrI3) covered by graphene can be characterized electronically and magnetically via STM by exploiting the transparency of graphene to tunneling electrons. STS reveals electronic structures of FL-CrI3 including flat bands responsible for its magnetic state. AFM-to-FM transition of FL-CrI3 can be visualized through the magnetic field dependent moiré contrast in the dI/dV maps due to a change of the electronic hybridization between graphene and spin-polarised CrI3 bands with different interlayer magnetic coupling. Our findings provide a general route to probe atomic-scale electronic and magnetic properties of 2D magnetic insulators for future spintronics and quantum technology applications.

Magnetic properties of undoped and Co-doped n-type β–FeSi2.5 single crystals

2002 ◽  
Vol 17 (11) ◽  
pp. 2960-2965 ◽  
Author(s):  
E. Arushanov ◽  
L. Ivanenko ◽  
D. Eckert ◽  
G. Behr ◽  
U. K. Rößler ◽  
...  
Keyword(s):  
Activation Energy ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
External Field ◽  
Single Crystals ◽  
Spin Glasses ◽  
Paramagnetic Centers ◽  
Temperature Dependent ◽  
Paramagnetic Curie Temperature ◽  
Co Doped

Results of magnetization and magnetic susceptibility measurements on undoped and Co-doped FeSi2.5 single crystals are presented. The temperature dependence of the magnetic susceptibility of the Co-doped sample in the range of 5–300 K can be explained by temperature-dependent contributions due to paramagnetic centers and the carriers excited thermally in the extrinsic conductivity region. The values of the paramagnetic Curie temperature and activation energy of the donor levels were estimated. It is also shown that the magnetic susceptibility of Co-doped samples cooled in zero external field and in a field are different. This resembles the properties of spin-glasses and indicates the presence of coupling between magnetic centers.

Microstructure and Properties of (Tb,Sm)CoSi/Cr Series Thin Films for Permanent Magnets

2007 ◽  
Vol 121-123 ◽  
pp. 267-270 ◽  
Author(s):  
X. Wang ◽  
Z.Y. Li ◽  
X. Yu ◽  
S. Su ◽  
J. Li
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Permanent Magnets ◽  
Magnetic Layer ◽  
Lattice Matching ◽  
Microstructure And Properties ◽  
N2 Atmosphere ◽  
Magnetic Layers

The microstructures and properties of (Tb,Sm)CoSi/Cr series films have been investigated. All the samples were sputtered and annealed at 500 °C for 25 min in pure N2 atmosphere, and their microstructures and properties were examined. The effect on the magnetic properties of partial Sm substituted by Tb is discussed. The lattice matching media were examined. And the mechanisms of interactions among the grains and between the magnetic layers have been analyzed by comparing multi magnetic layer with the mono magnetic layer.

scholarly journals Magnetic Properties of Acenes and Their o-Quinone Derivatives: Computer Simulation

2018 ◽  
Vol 478 (2) ◽  
pp. 21-25 ◽  
Author(s):  
A. A. Starikova ◽  
A. G. Starikov ◽  
R. M. Minyaev ◽  
A. I. Boldyrev ◽  
V. I. Minkin
Keyword(s):  
Computer Simulation ◽  
Magnetic Properties

scholarly journals Biaxial nematics of hard cuboids in an external field

Soft Matter ◽  
2019 ◽  
Vol 15 (9) ◽  
pp. 1922-1926 ◽  
Author(s):  
Alejandro Cuetos ◽  
Effran Mirzad Rafael ◽  
Daniel Corbett ◽  
Alessandro Patti
Keyword(s):  
Computer Simulation ◽  
Liquid Crystal ◽  
External Field ◽  
Colloidal Suspensions ◽  
Phase Behaviour ◽  
Crystal Phase ◽  
Liquid Crystal Phase ◽  
Biaxial Nematics ◽  
Biaxial Nematic

By computer simulation, we model the phase behaviour of colloidal suspensions of board-like particles under the effect of an external field and assess the still disputed occurrence of the biaxial nematic (NB) liquid crystal phase.

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