Zigzag domain wall mediated reversal in antiferromagnetically coupled layers

R. Lavrijsen, R.P. Cowburn, R. Mansell, D.C.M.C. Petit, A. Fernández-Pacheco, N.-J. Steinke, J.H. Lee

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The Ruderman-Kittel-Kasuya-Yosida (RKKY) coupling between two magnetic layers leads to many important technological applications. Here, the interaction between changing antiferromagnetic RKKY coupling and domain structure is studied in a sample consisting of two 5 nm thick CoFeB layers separated by a wedge of Cu up to 4 nm thick. Magnetic reversal occurs via the propagation of a zigzag domain wall front along the wedge. The modification of domain patterns created in the reversal of a coupled layers in the presence of antiferromagnetic RKKY coupling and coupling gradients is demonstrated. Firstly, the coupling leads to a smaller amplitude of the zigzag wall, which is aligned perpendicular to the easy axis, followed by elongation of the walls at higher coupling strength. The antiferromagnetic RKKY coupling, while not strong enough to cause antiparallel alignment of the layers, is argued to lead to coupling between the spins in the domain walls in the two layers, lowering their energy and driving the reversal behavior of the film.
Originele taal-2Engels
Artikelnummer 4102304
Aantal pagina's4
TijdschriftIEEE Magnetics Letters
Volume8
DOI's
StatusGepubliceerd - 2017

Vingerafdruk

Domain walls
Elongation

Trefwoorden

  • Nanomagnetics
  • domain wall dynamics
  • giant magnetoresistance
  • magnetic and spintronic materials
  • magnetic films
  • magnetic materials
  • magnetic microscopy
  • magnetism in solids
  • magnetodynamics

Citeer dit

Lavrijsen, R., Cowburn, R. P., Mansell, R., Petit, D. C. M. C., Fernández-Pacheco, A., Steinke, N-J., & Lee, J. H. (2017). Zigzag domain wall mediated reversal in antiferromagnetically coupled layers. IEEE Magnetics Letters, 8, [ 4102304]. https://doi.org/10.1109/LMAG.2016.2628021
Lavrijsen, R. ; Cowburn, R.P. ; Mansell, R. ; Petit, D.C.M.C. ; Fernández-Pacheco, A. ; Steinke, N.-J. ; Lee, J.H. / Zigzag domain wall mediated reversal in antiferromagnetically coupled layers. In: IEEE Magnetics Letters. 2017 ; Vol. 8.
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title = "Zigzag domain wall mediated reversal in antiferromagnetically coupled layers",
abstract = "The Ruderman-Kittel-Kasuya-Yosida (RKKY) coupling between two magnetic layers leads to many important technological applications. Here, the interaction between changing antiferromagnetic RKKY coupling and domain structure is studied in a sample consisting of two 5 nm thick CoFeB layers separated by a wedge of Cu up to 4 nm thick. Magnetic reversal occurs via the propagation of a zigzag domain wall front along the wedge. The modification of domain patterns created in the reversal of a coupled layers in the presence of antiferromagnetic RKKY coupling and coupling gradients is demonstrated. Firstly, the coupling leads to a smaller amplitude of the zigzag wall, which is aligned perpendicular to the easy axis, followed by elongation of the walls at higher coupling strength. The antiferromagnetic RKKY coupling, while not strong enough to cause antiparallel alignment of the layers, is argued to lead to coupling between the spins in the domain walls in the two layers, lowering their energy and driving the reversal behavior of the film.",
keywords = "Nanomagnetics, domain wall dynamics, giant magnetoresistance, magnetic and spintronic materials, magnetic films, magnetic materials, magnetic microscopy, magnetism in solids, magnetodynamics",
author = "R. Lavrijsen and R.P. Cowburn and R. Mansell and D.C.M.C. Petit and A. Fern{\'a}ndez-Pacheco and N.-J. Steinke and J.H. Lee",
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Lavrijsen, R, Cowburn, RP, Mansell, R, Petit, DCMC, Fernández-Pacheco, A, Steinke, N-J & Lee, JH 2017, 'Zigzag domain wall mediated reversal in antiferromagnetically coupled layers', IEEE Magnetics Letters, vol. 8, 4102304. https://doi.org/10.1109/LMAG.2016.2628021

Zigzag domain wall mediated reversal in antiferromagnetically coupled layers. / Lavrijsen, R.; Cowburn, R.P.; Mansell, R.; Petit, D.C.M.C.; Fernández-Pacheco, A.; Steinke, N.-J.; Lee, J.H.

In: IEEE Magnetics Letters, Vol. 8, 4102304, 2017.

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

TY - JOUR

T1 - Zigzag domain wall mediated reversal in antiferromagnetically coupled layers

AU - Lavrijsen, R.

AU - Cowburn, R.P.

AU - Mansell, R.

AU - Petit, D.C.M.C.

AU - Fernández-Pacheco, A.

AU - Steinke, N.-J.

AU - Lee, J.H.

PY - 2017

Y1 - 2017

N2 - The Ruderman-Kittel-Kasuya-Yosida (RKKY) coupling between two magnetic layers leads to many important technological applications. Here, the interaction between changing antiferromagnetic RKKY coupling and domain structure is studied in a sample consisting of two 5 nm thick CoFeB layers separated by a wedge of Cu up to 4 nm thick. Magnetic reversal occurs via the propagation of a zigzag domain wall front along the wedge. The modification of domain patterns created in the reversal of a coupled layers in the presence of antiferromagnetic RKKY coupling and coupling gradients is demonstrated. Firstly, the coupling leads to a smaller amplitude of the zigzag wall, which is aligned perpendicular to the easy axis, followed by elongation of the walls at higher coupling strength. The antiferromagnetic RKKY coupling, while not strong enough to cause antiparallel alignment of the layers, is argued to lead to coupling between the spins in the domain walls in the two layers, lowering their energy and driving the reversal behavior of the film.

AB - The Ruderman-Kittel-Kasuya-Yosida (RKKY) coupling between two magnetic layers leads to many important technological applications. Here, the interaction between changing antiferromagnetic RKKY coupling and domain structure is studied in a sample consisting of two 5 nm thick CoFeB layers separated by a wedge of Cu up to 4 nm thick. Magnetic reversal occurs via the propagation of a zigzag domain wall front along the wedge. The modification of domain patterns created in the reversal of a coupled layers in the presence of antiferromagnetic RKKY coupling and coupling gradients is demonstrated. Firstly, the coupling leads to a smaller amplitude of the zigzag wall, which is aligned perpendicular to the easy axis, followed by elongation of the walls at higher coupling strength. The antiferromagnetic RKKY coupling, while not strong enough to cause antiparallel alignment of the layers, is argued to lead to coupling between the spins in the domain walls in the two layers, lowering their energy and driving the reversal behavior of the film.

KW - Nanomagnetics

KW - domain wall dynamics

KW - giant magnetoresistance

KW - magnetic and spintronic materials

KW - magnetic films

KW - magnetic materials

KW - magnetic microscopy

KW - magnetism in solids

KW - magnetodynamics

U2 - 10.1109/LMAG.2016.2628021

DO - 10.1109/LMAG.2016.2628021

M3 - Article

VL - 8

JO - IEEE Magnetics Letters

JF - IEEE Magnetics Letters

SN - 1949-307X

M1 - 4102304

ER -