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Title: Accurate model of the stripe domain phase of perpendicularly magnetized multilayers

Journal Article · · Physical Review. B
 [1];  [1];  [1]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

We develop an accurate analytical model for the stray field energy of parallel stripe domains in multilayer films with perpendicular magnetic anisotropy, taking into account the effects of finite domain wall width and variable domain wall angle. By minimizing the total energy, we predict the domain width, the domain wall width, and the domain wall angle for given material parameters. We show how the domain wall width depends on the film thickness and the domain size. We explore the domain wall angle as a function of Dzyaloshinskii-Moriya interaction (DMI) and derive a threshold value We develop an accurate analytical model for the stray field energy of parallel stripe domains in multilayer films with perpendicular magnetic anisotropy, taking into account the effects of finite domain wall width and variable domain wall angle. By minimizing the total energy, we predict the domain width, the domain wall width, and the domain wall angle for given material parameters. We show how the domain wall width depends on the film thickness and the domain size. We explore the domain wall angle as a function of Dzyaloshinskii-Moriya interaction (DMI) and derive a threshold value Dthr beyond which the system is in a Néel state. We find that thicker films require larger values of DMI to stabilize the Néel state. Finally, we test the effective medium theory, which allows treating multilayers as effective single layer films, and provide criteria for the applicability of the model in the presence of both surface and volume stray fields. Furthermore our results are supported by micromagnetic simulations, which indicate that the predictions are still precise even if the system is in a labyrinthine domain state. Using our model, otherwise inaccessible magnetic parameters, such as the DMI constant or the exchange constant, can now be obtained straightforwardly from static measurements of the stripe domain width in such films.

Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012371
OSTI ID:
1505619
Alternate ID(s):
OSTI ID: 1357700
Journal Information:
Physical Review. B, Vol. 95, Issue 17; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 71 works
Citation information provided by
Web of Science

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Current-Induced Skyrmion Generation through Morphological Thermal Transitions in Chiral Ferromagnetic Heterostructures journal October 2018
Effect of Dzyaloshinskii–Moriya Interaction Energy Confinement on Current‐Driven Dynamics of Skyrmions journal May 2019
Interface-driven chiral magnetism and current-driven domain walls in insulating magnetic garnets journal April 2019
Thermal skyrmion diffusion used in a reshuffler device journal April 2019
Theory of isolated magnetic skyrmions: From fundamentals to room temperature applications journal March 2018
Soft X-ray magnetic scattering studies of 3D magnetic morphology along buried interfaces in NiFe/CoPd/NiFe nanostructures journal October 2019
Individual skyrmion manipulation by local magnetic field gradients journal November 2019
Investigation of the Dzyaloshinskii-Moriya interaction and room temperature skyrmions in W/CoFeB/MgO thin films and microwires journal July 2017
Temperature dependence of the Dzyaloshinskii-Moriya interaction in Pt/Co/Cu thin film heterostructures journal August 2018
Frontiers of magnetic force microscopy journal February 2019
Generation and stability of structurally imprinted target skyrmions in magnetic multilayers journal September 2019
Triangular and Sawtooth Magnetic Domains in Measuring the Dzyaloshinskii-Moriya Interaction journal December 2018
Walker Breakdown with a Twist: Dynamics of Multilayer Domain Walls and Skyrmions Driven by Spin-Orbit Torque journal October 2019
Measuring the Dzyaloshinskii-Moriya interaction of the epitaxial Co/Ir(111) interface journal September 2019
Unraveling the role of dipolar versus Dzyaloshinskii-Moriya interactions in stabilizing compact magnetic skyrmions journal January 2020
Hybrid chiral domain walls and skyrmions in magnetic multilayers journal July 2018
Investigation of the Dzyaloshinskii-Moriya interaction and room temperature skyrmions in W/CoFeB/MgO thin films and microwires text January 2017
Individual skyrmion manipulation by local magnetic field gradients text January 2019
Thermal skyrmion diffusion used in a reshuffler device text January 2019
Hybrid chiral domain walls and skyrmions in magnetic multilayers text January 2017
Individual skyrmion manipulation by local magnetic field gradients text January 2019
Unraveling the role of dipolar versus Dzyaloshinskii-Moriya interaction in stabilizing compact magnetic skyrmions text January 2019
Walker breakdown with a twist: Dynamics of multilayer domain walls and skyrmions driven by spin-orbit torque text January 2019
Tailored flux pinning in superconductor/ferromagnet multilayers with engineered magnetic domain morphology from stripes to skyrmions text January 2020