Magnetic Microscopy of Fe/Mn/Fe Layers

1997 ◽  
Vol 475 ◽  
Author(s):  
H. Hopster ◽  
Y. Iwasaki ◽  
J. Barthel ◽  
E.B. Maiken ◽  
B.P. Miller ◽  
...  
Keyword(s):  
Domain Structure ◽  
Secondary Electron ◽  
Critical Thickness ◽  
Magnetic Domain ◽  
Magnetic Films ◽  
Polarization Analysis ◽  
Domain Pattern ◽  
Soft Magnetic ◽  
Ferromagnetic Order ◽  
Delayed Onset

Abstract Manganese layers were deposited on polycrystalline Fe-based soft magnetic films. The magnetic domain structure of thin Fe overlayers on top these Mn films was measured by secondary electron microscopy with polarization analysis. The Fe layers show spin polarization only beyond a certain critical thickness of about 20 Å. Beyond this thickness the domain structure of the substrate starts to appear in the Fe overlayer. This delayed onset of ferromagnetic order in the Fe layers is attributed to frustration of ferromagnetic order due to the strong coupling to the antiferromagnetically ordered Mn. With increasing Fe film thickness (between 20–30 Å) the magnetization increases and shows the same domain pattern as the substrate. We find that for all Mn thicknesses studied (up to 170 Å) the Fe overlayer domain structure reproduces the substrate domain structure and the magnetization is always aligned parallel with the substrate magnetization.

Polarisation dependent Raman study of single-crystal nickel oxide

Open Physics ◽  
2011 ◽  
Vol 9 (4) ◽  
Author(s):  
Nina Mironova-Ulmane ◽  
Alexei Kuzmin ◽  
Ilmo Sildos ◽  
Martti Pärs
Keyword(s):  
Raman Scattering ◽  
Nickel Oxide ◽  
Single Crystal ◽  
Single Crystals ◽  
Domain Structure ◽  
Magnetic Domain ◽  
Domain Pattern ◽  
Polarized Optical Microscopy ◽  
Twin Domain ◽  
Raman Study

AbstractThe magnetic domain structure and Raman scattering have been studied in NiO single-crystals with three different (100), (110) and (111) orientations. Twin-domain structure was observed in NiO(100) and NiO(110) single-crystals using cross-polarized optical microscopy. We found that the ratio of the two-magnon (at 1500 cm−1) to the two-phonon (2LO, at 1100 cm−1) Raman bands intensity is sensitive in a particular way to the type of the twin-domain pattern.

Influence of the domain structure on the microwave permeability of soft magnetic films and multilayers

2005 ◽  
Vol 292 ◽  
pp. 201-209 ◽  
Author(s):  
Frédéric Schoenstein ◽  
Patrice Aublanc ◽  
Hubert Pagès ◽  
Samuel Queste ◽  
Valérie Barentin ◽  
...  
Keyword(s):  
Domain Structure ◽  
Magnetic Films ◽  
Soft Magnetic ◽  
Microwave Permeability ◽  
Magnetic Films And Multilayers ◽  
Soft Magnetic Films

A mixed domain structure in magnetic films with large anisotropy

2018 ◽  
Vol 32 (01) ◽  
pp. 1750272 ◽  
Author(s):  
M. L. Akimov ◽  
P. A. Polyakov ◽  
N. E. Rusakova
Keyword(s):  
Domain Wall ◽  
Domain Structure ◽  
Magnetic Domain ◽  
Magnetic Films ◽  
Physical Parameters ◽  
Stray Field ◽  
Stripe Domain ◽  
Analytical Expression ◽  
Cylindrical Magnetic Domain ◽  
Large Anisotropy

Influence of anisotropy on a bending of a magnetic stripe domain wall due to a magnetostatic stray field of a cylindrical magnetic domain (CMD) that is located within the stripe one is under investigation. It is revealed that for a specific set of physical parameters of the domain structure, energy of domain wall bending anisotropy can suppress the bending. An analytical expression for the bending shape is obtained on account of a change of both magnetostatic energy of the configuration and energy of anisotropy of the domain wall.

The Influence of Magnetoelectric Interactions on the Domain Walls in Multiferroics

2012 ◽  
Vol 190 ◽  
pp. 265-268
Author(s):  
Z.V. Gareeva ◽  
A.K. Zvezdin
Keyword(s):  
Magnetic Structure ◽  
Domain Structure ◽  
Domain Walls ◽  
Magnetic Domain ◽  
Ferroelectric Domain ◽  
Domain Pattern ◽  
Ferroelectric Domains ◽  
Magnetic Domain Walls ◽  
Vector Distribution ◽  
Antiferromagnetic Vector

The influence of magnetoelectric interactions on the magnetic structure, flexomagnetoelectric polarization and magnetization in thin multiferroics film has been investigated. The correlation between antiferromagnetic domain structure and ferroelectric domain pattern has been revealed. It has been shown the asymmetry of the antiferromagnetic vector distribution over multiferroics film in the case of 1090 and 710 ferroelectric domain walls. The direction of spins rotation in magnetic domain walls is determined by the type of ferroelectric domains and the antiferromagnetic vector in the centre of ferroelectric domain. The peculiarities of the micromagnetic distribution are reflected in the behavior of polarization and magnetization, which appears to be different for 1800, 1090 and 710 ferroelectric domains.

Magnetic Domain Structure of Sm(Co, Cu, Fe, Zr)$_{\rm x}$ Thick Permanent Magnetic Films

2013 ◽  
Vol 49 (7) ◽  
pp. 3360-3363 ◽  
Author(s):  
Yun Zhang ◽  
Yong Zhang ◽  
Ji-Zhong Song ◽  
Xiao-Yu Qi ◽  
Juan Du ◽  
...  
Keyword(s):  
Domain Structure ◽  
Magnetic Domain ◽  
Magnetic Films ◽  
Magnetic Domain Structure

Domains and domain nucleation in magnetron-sputtered CoCr thin films

1993 ◽  
Vol 51 ◽  
pp. 1046-1047
Author(s):  
B. G. Demczyk
Keyword(s):  
Thin Films ◽  
Domain Structure ◽  
Magnetic Domain ◽  
Domain Size ◽  
Film Plane ◽  
Magnetic Domain Structure ◽  
Perpendicular Magnetization ◽  
Columnar Grains ◽  
Reversal Mechanism ◽  
Lorentz Transmission Electron Microscopy

CoCr thin films have been of interest for a number of years due to their strong perpendicular anisotropy, favoring magnetization normal to the film plane. The microstructure and magnetic properties of CoCr films prepared by both rf and magnetron sputtering have been examined in detail. By comparison, however, relatively few systematic studies of the magnetic domain structure and its relation to the observed film microstructure have been reported. In addition, questions still remain as to the operative magnetization reversal mechanism in different film thickness regimes. In this work, the magnetic domain structure in magnetron sputtered Co-22 at.%Cr thin films of known microstructure were examined by Lorentz transmission electron microscopy. Additionally, domain nucleation studies were undertaken via in-situ heating experiments.It was found that the 50 nm thick films, which are comprised of columnar grains, display a “dot” type domain configuration (Figure 1d), characteristic of a perpendicular magnetization. The domain size was found to be on the order of a few structural columns in diameter.

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