scholarly journals Field-free topological behavior in the magnetic domain wall of ferrimagnetic GdFeCo

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Zhuolin Li ◽  
Jian Su ◽  
Shi-Zeng Lin ◽  
Dan Liu ◽  
Yang Gao ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Domain Wall ◽  
Magnetic Domain ◽  
Underlying Mechanism ◽  
Real Space ◽  
Spin Reorientation ◽  
Topological Transformation ◽  
Micromagnetic Simulations ◽  
Magnetic Devices ◽  
Fundamental Research

AbstractExploring and controlling topological textures such as merons and skyrmions has attracted enormous interests from the perspective of fundamental research and spintronic applications. It has been predicted theoretically and proved experimentally that the lattice form of topological meron-skyrmion transformation can be realized with the requirement of external magnetic fields in chiral ferromagnets. However, such topological transition behavior has yet to be verified in other materials. Here, we report real-space observation of magnetic topology transformation between meron pairs and skyrmions in the localized domain wall of ferrimagnetic GdFeCo films without the need of magnetic fields. The topological transformation in the domain wall of ferrimagnet is introduced by temperature-induced spin reorientation transition (SRT) and the underlying mechanism is revealed by micromagnetic simulations. The convenient electric-controlling topology transformation and driving motion along the confined domain wall is further anticipated, which will enable advanced application in magnetic devices.

Magnetic domain wall propagation in nanowires under transverse magnetic fields

2008 ◽  
Vol 103 (7) ◽  
pp. 073906 ◽  
Author(s):  
Matthew T. Bryan ◽  
Thomas Schrefl ◽  
Del Atkinson ◽  
Dan A. Allwood
Keyword(s):  
Magnetic Fields ◽  
Domain Wall ◽  
Magnetic Domain ◽  
Transverse Magnetic ◽  
Magnetic Domain Wall ◽  
Domain Wall Propagation

scholarly journals Reconfigurable magnetic domain wall pinning using vortex-generated magnetic fields

2017 ◽  
Vol 110 (18) ◽  
pp. 182404 ◽  
Author(s):  
Aaron C. H. Hurst ◽  
Joshua A. Izaac ◽  
Fouzia Altaf ◽  
Vincent Baltz ◽  
Peter J. Metaxas
Keyword(s):  
Magnetic Fields ◽  
Domain Wall ◽  
Magnetic Domain ◽  
Magnetic Domain Wall ◽  
Domain Wall Pinning

Nonrecessive and Sustained Precessional Domain Wall Motion Driven by Perpendicular Field Pulses in Thin Magnetic Nanocylinders

SPIN ◽  
2017 ◽  
Vol 07 (01) ◽  
pp. 1740008
Author(s):  
Jianyi Liu ◽  
Jun Guo ◽  
Mingming Yang ◽  
Xiaoyan Zeng ◽  
Ming Yan
Keyword(s):  
Domain Wall ◽  
External Field ◽  
Analytical Calculation ◽  
Magnetic Domain ◽  
Domain Wall Motion ◽  
Maximum Speed ◽  
Field Pulse ◽  
Micromagnetic Simulations ◽  
Novel Approach ◽  
Perpendicular Field

In a conventional field-driven domain wall (DM) motion, the external field is applied along the magnetization of the magnetic domain which is expanded during the process. Recently, a novel approach is proposed to utilize a perpendicular field pulse rather than an in-plane one to drive DWs in magnetic nanostripes. In this paper, we apply this idea to transverse DWs in thin cylindrical nanowires. In the case of driving a single DW, this approach displays apparent advantages. Owing to the zero DW mass and inertia, a net DW displacement can be attained by applying a field pulse which is initially vertical to the DW magnetization. Therefore, no artificial pinning sites are required as in flat strips. Furthermore, we propose to rotate the external field with a particular frequency to maintain a right angle between the field and the DW magnetization. In this way, a continuous DW motion with maximum speed can be realized. The feasibility of this proposed approach is demonstrated by micromagnetic simulations and an analytical calculation.

Manipulating magnetic moment in a magnetic domain wall under transverse magnetic fields near Walker threshold

2010 ◽  
Vol 108 (6) ◽  
pp. 063904 ◽  
Author(s):  
Youngman Jang ◽  
Seungha Yoon ◽  
Seungkyo Lee ◽  
Kisu Lee ◽  
B. K. Cho
Keyword(s):  
Magnetic Fields ◽  
Domain Wall ◽  
Magnetic Moment ◽  
Magnetic Domain ◽  
Transverse Magnetic ◽  
Magnetic Domain Wall

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.

Numerical Analysis of a Magnetic Domain Wall in a Magnetic Nanocontact

2005 ◽  
Vol 29 (2) ◽  
pp. 116-119
Author(s):  
T. Komine ◽  
T. Takahashi ◽  
R. Sugita ◽  
T. Muranoi ◽  
Y. Hasegawa
Keyword(s):  
Numerical Analysis ◽  
Domain Wall ◽  
Magnetic Domain ◽  
Magnetic Domain Wall

scholarly journals Giant conductivity of mobile non-oxide domain walls

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
S. Ghara ◽  
K. Geirhos ◽  
L. Kuerten ◽  
P. Lunkenheimer ◽  
V. Tsurkan ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Domain Wall ◽  
Domain Walls ◽  
Building Blocks ◽  
External Fields ◽  
Tail Domain ◽  
Oxide Electronics ◽  
Domain Wall Mobility ◽  
Conductance Changes ◽  
Wall Mobility

AbstractAtomically sharp domain walls in ferroelectrics are considered as an ideal platform to realize easy-to-reconfigure nanoelectronic building blocks, created, manipulated and erased by external fields. However, conductive domain walls have been exclusively observed in oxides, where domain wall mobility and conductivity is largely influenced by stoichiometry and defects. Here, we report on giant conductivity of domain walls in the non-oxide ferroelectric GaV4S8. We observe conductive domain walls forming in zig-zagging structures, that are composed of head-to-head and tail-to-tail domain wall segments alternating on the nanoscale. Remarkably, both types of segments possess high conductivity, unimaginable in oxide ferroelectrics. These effectively 2D domain walls, dominating the 3D conductance, can be mobilized by magnetic fields, triggering abrupt conductance changes as large as eight orders of magnitude. These unique properties demonstrate that non-oxide ferroelectrics can be the source of novel phenomena beyond the realm of oxide electronics.

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