The dynamics of domain walls in an easy-plane magnet in the field of an acoustic wave

2003 ◽  
Vol 45 (1) ◽  
pp. 124-129 ◽  
Author(s):  
V. S. Gerasimchuk ◽  
A. A. Shitov
Keyword(s):  
Acoustic Wave ◽  
Domain Walls ◽  
Easy Plane

Surface acoustic wave assisted depinning of magnetic domain walls

2021 ◽  
Author(s):  
Anil Adhikari ◽  
Emma Gilroy ◽  
Tom James Hayward ◽  
Shireen Adenwalla
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Domain Walls ◽  
Magnetic Domain ◽  
Magnetic Domain Walls

Interacting domain walls in an easy-plane ferromagnet

2002 ◽  
Vol 65 (17) ◽  
Author(s):  
W. M. Liu ◽  
B. Wu ◽  
X. Zhou ◽  
D. K. Campbell ◽  
S. T. Chui ◽  
...  
Keyword(s):  
Domain Walls ◽  
Easy Plane ◽  
Interacting Domain

scholarly journals Diffusive and Fluidlike Motion of Homochiral Domain Walls in Easy-Plane Magnetic Strips

2021 ◽  
Vol 16 (5) ◽  
Author(s):  
David A. Smith ◽  
So Takei ◽  
Bella Brann ◽  
Lia Compton ◽  
Fernando Ramos-Diaz ◽  
...  
Keyword(s):  
Domain Walls ◽  
Easy Plane

Autoresonance Excitation of Nonlinear Oscillations of Magnetization and Domain Walls in Ferromagnets

2010 ◽  
Vol 168-169 ◽  
pp. 77-80
Author(s):  
A.T. Kharisov ◽  
L.A. Kalyakin ◽  
M.A. Shamsutdinov
Keyword(s):  
Domain Wall ◽  
Domain Walls ◽  
Nonlinear Oscillations ◽  
Resonance Field ◽  
Ferromagnetic Film ◽  
Easy Plane ◽  
Narrow Resonance ◽  
Linear Resonance ◽  
Weak Dissipation ◽  
Low Amplitude

We investigate the conditions of capturing into resonance and exciting nonlinear ferromagnetic resonance in a ferromagnetic film with the anisotropic easy plane, as well as autoresonance excitation of nonlinear oscillations of the domain wall in uniaxial ferromagnets. The investigations demonstrate that in easy-plane ferromagnets with a narrow resonance line nonlinear oscillations of magnetization in the autoresonance mode can be generated. This autoresonance takes place if the resonance field grows slowly and pumping frequency is the constant which is equal to the frequency of linear resonance. It has been established that effectively exciting nonlinear oscillations of the domain wall in uniaxial ferromagnets and controlling the wall dynamics by low-amplitude alternating fields with the slow variation of the planar field in the autophasing mode are possible in the case of weak dissipation.

The direct determination of magnetic domain wall profiles using a split detector STEM

1978 ◽  
Vol 36 (1) ◽  
pp. 466-467
Author(s):  
J.N. Chapman ◽  
P.E. Batson ◽  
E.M. Waddell ◽  
R.P. Ferrier
Keyword(s):  
Electron Microscope ◽  
Domain Wall ◽  
Transmission Electron Microscope ◽  
Domain Walls ◽  
Photographic Plate ◽  
Magnetic Domain ◽  
Direct Determination ◽  
Quantitative Information ◽  
Scanning Transmission Electron Microscope ◽  
Transmission Electron

By far the most commonly used mode of Lorentz microscopy in the examination of ferromagnetic thin films is the Fresnel or defocus mode. Use of this mode in the conventional transmission electron microscope (CTEM) is straightforward and immediately reveals the existence of all domain walls present. However, if such quantitative information as the domain wall profile is required, the technique suffers from several disadvantages. These include the inability to directly observe fine image detail on the viewing screen because of the stringent illumination coherence requirements, the difficulty of accurately translating part of a photographic plate into quantitative electron intensity data, and, perhaps most severe, the difficulty of interpreting this data. One solution to the first-named problem is to use a CTEM equipped with a field emission gun (FEG) (Inoue, Harada and Yamamoto 1977) whilst a second is to use the equivalent mode of image formation in a scanning transmission electron microscope (STEM) (Chapman, Batson, Waddell, Ferrier and Craven 1977), a technique which largely overcomes the second-named problem as well.

Lorentz microscopy study of magnetic domain walls in Fe-Cr-Co alloys

1978 ◽  
Vol 36 (1) ◽  
pp. 462-463
Author(s):  
Yalcin Belli
Keyword(s):  
Domain Walls ◽  
Magnetic Domain ◽  
Microscopy Study ◽  
Ferromagnetic Phase ◽  
Stable Phase ◽  
Magnetic Domains ◽  
Lorentz Microscopy ◽  
Magnetic Hardening ◽  
Electron Microscopes ◽  
Co Alloys

Fe-Cr-Co alloys have great technological potential to replace Alnico alloys as hard magnets. The relationship between the microstructures and the magnetic properties has been recently established for some of these alloys. The magnetic hardening has been attributed to the decomposition of the high temperature stable phase (α) into an elongated Fe-rich ferromagnetic phase (α1) and a weakly magnetic or non-magnetic Cr-rich phase (α2). The relationships between magnetic domains and domain walls and these different phases are yet to be understood. The TEM has been used to ascertain the mechanism of magnetic hardening for the first time in these alloys. The present paper describes the magnetic domain structure and the magnetization reversal processes in some of these multiphase materials. Microstructures to change properties resulting from, (i) isothermal aging, (ii) thermomagnetic treatment (TMT) and (iii) TMT + stepaging have been chosen for this investigation. The Jem-7A and Philips EM-301 transmission electron microscopes operating at 100 kV have been used for the Lorentz microscopy study of the magnetic domains and their interactions with the finely dispersed precipitate phases.

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