Magnetic Recording Systems: Magnetic Domain Walls Dynamic Due To Spin Transfer Torque, Spin Orbit Torques and Applied Magnetic Field Simultaneously

We show that a type of magnetic domain walls (DWs) can be monitored by anisotropic magnetoresistance (AMR) measurements due to a specific DW volume depending on the DW type in NiFe magnetic wires. A circular DW injection pad is used to generate DWs at a low magnetic field, resulting in reliable DW introduction into magnetic wires. DW pinning is induced by a change of DW energy at an asymmetric single notch. The injection of DW from the circular pad and its pinning at the notch is observed by using AMR and magnetic force microscope (MFM) measurements. A four-point probe AMR measurement allows us to distinguish the DW type in the switching process because DWs are pinned at the single notch, where voltage probes are closely placed around the notch. Two types of AMR behavior are observed in the AMR measurements, which is owing to a change of DW structures. MFM images and micromagnetic simulations are consistent with the AMR results.

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Topological damping Rashba spin-orbit torque in ballistic magnetic domain walls

Physical Review B ◽

10.1103/physrevb.101.020410 ◽

2020 ◽

Vol 101 (2) ◽

Cited By ~ 2

Author(s):

D. Wang ◽

Yan Zhou

Keyword(s):

Domain Walls ◽

Magnetic Domain ◽

Spin Orbit ◽

Rashba Spin ◽

Magnetic Domain Walls

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Tuning spin–orbit torques at magnetic domain walls in epitaxial Pt/Co/Pt1−x Au x trilayers

Nanotechnology ◽

10.1088/1361-6528/ab087b ◽

2019 ◽

Vol 30 (23) ◽

pp. 234003 ◽

Cited By ~ 3

Author(s):

Aleš Hrabec ◽

Kowsar Shahbazi ◽

Thomas A Moore ◽

Eduardo Martinez ◽

Christopher H Marrows

Keyword(s):

Domain Walls ◽

Magnetic Domain ◽

Spin Orbit ◽

Magnetic Domain Walls

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White Synchrotron Radiation Topography of (11̄0) Nickel Single Crystal

Zeitschrift für Naturforschung A ◽

10.1515/zna-1982-0516 ◽

1982 ◽

Vol 37 (5) ◽

pp. 505-511

Author(s):

J. D. Stephenson

Keyword(s):

Magnetic Field ◽

Synchrotron Radiation ◽

Single Crystal ◽

Domain Structure ◽

Domain Walls ◽

Magnetic Domain ◽

Nickel Single Crystal ◽

Magnetic Domain Walls ◽

Equivalent Field ◽

Nickel Crystal

Changes in 70.53° magnetic domain structure on the surface of a perfect (11̄0) nickel crystal have been observed using white synchrotron X-radiation topography. The crystal was influenced by a variable [11̄0] magnetic field. At field strengths ≿ 100 A/m [111̄]-spike domains, thought to be traces of [011], 70.53° (oblique) magnetic domain walls, appeared within [111]-bands (0.4 mm wide) in the topographs. Reversal of the field produced similar spikes at equivalent field values but in different regions of the crystal.

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Experimental Study and Numerical Modelling of Magnetic Domain Walls Drift in Ferrite Garnet Crystals

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.215.437 ◽

2014 ◽

Vol 215 ◽

pp. 437-442 ◽

Cited By ~ 4

Author(s):

Lidia A. Pamyatnykh ◽

Georgy A. Shmatov ◽

Mikhail S. Lysov ◽

Sergey E. Pamyatnykh ◽

Dmitry S. Mehonoshin

Keyword(s):

Magnetic Field ◽

Experimental Study ◽

Numerical Modelling ◽

Linear Function ◽

Qualitative Agreement ◽

Domain Walls ◽

Magnetic Domain ◽

Ferrite Garnet ◽

Magnetic Domain Walls ◽

Oscillating Magnetic Field

The results of study of domain walls oscillations in harmonic magnetic field H = H0sin (2πft) oriented perpendicular to ferrite garnet (TbErGd)3(FeAl)5O12 (111) sample plate for amplitudes that include the drift of domain walls are reported. Numerical modelling of domain walls motion was performed for frequencies f~102 Hz, where the drift is observed experimentally. Comparison of results of numerical modelling with experimental results shows their qualitative agreement. It was established that domain walls oscillations amplitude is a linear function of amplitude of oscillating magnetic field.

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