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Title: Quantification of Mixed Bloch-Néel Topological Spin Textures Stabilized by the Dzyaloshinskii-Moriya Interaction in Co / Pd Multilayers

Journal Article · · Physical Review Letters
ORCiD logo [1];  [2];  [3];  [2];  [2];  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)
  2. National Univ. of Singapore (Singapore)
  3. Technical Univ. of Denmark, Lyngby (Denmark)

The three-dimensional structure of nanoscale topological spin textures stabilized by the Dzyaloshinskii-Moriya interaction is governed by the delicate competition between the exchange, demagnetization, and anisotropy energies. The quantification of such spin textures through direct experimental methods is crucial towards understanding the fundamental physics associated with their ordering, as well as their manipulation in spintronic devices. Here in this work, we extend the Lorentz transmission electron microscopy technique to quantify mixed Bloch-Néel chiral spin textures stabilized by the Dzyaloshinskii-Moriya interaction in Co / Pd multilayers. Analysis of the observed intensities under varied imaging conditions coupled to corroborative micromagnetic simulations yields vital parameters that dictate the stability and properties of the complex spin texture, namely, the degree of mixed Bloch-Néel character, the domain wall width, the strength of the Dzyaloshinskii-Moriya interaction, and the exchange stiffness. In conclusion, this approach provides the necessary framework for the application of quantitative Lorentz phase microscopy to a broad array of topological spin systems.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Grant/Contract Number:
SC0012704
OSTI ID:
1546048
Alternate ID(s):
OSTI ID: 1546360
Report Number(s):
BNL--211920-2019-JAAM
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 23 Vol. 122; ISSN 0031-9007; ISSN PRLTAO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (58)

Determination of domain wall chirality using in situ Lorentz transmission electron microscopy journal May 2017
Asymmetric skyrmion Hall effect in systems with a hybrid Dzyaloshinskii-Moriya interaction text January 2018
A straightforward specimen holder modification for remnant magnetic-field measurement in TEM journal April 2007
Lorentz Microscopy on Amorphous Films with Perpendicular Anisotropy as a Function of Temperature journal August 1976
Spontaneous skyrmion ground states in magnetic metals journal August 2006
Dzyaloshinskii-Moriya interaction in symmetric epitaxial [ Co / Pd ( 111 ) ] N superlattices with different numbers of Co/Pd bilayers journal January 2019
Measurement of magnetic domain wall width using energy-filtered Fresnel images: MEASUREMENT OF MAGNETIC DOMAIN WALL WIDTH journal August 2002
Quantitative phase-sensitive imaging in a transmission electron microscope journal May 2000
Characterization of JEOL 2100F Lorentz-TEM for low-magnification electron holography and magnetic imaging journal June 2008
Skyrmions on the track journal March 2013
Magnetic skyrmions: advances in physics and potential applications journal June 2017
Asymmetric Magnetic Domain-Wall Motion by the Dzyaloshinskii-Moriya Interaction text January 2013
Observation of Skyrmions in a Multiferroic Material journal April 2012
Magnetostatic twists in room-temperature skyrmions explored by nitrogen-vacancy center spin texture reconstruction journal July 2018
Transmission Electron Microscopy book January 1996
Chiral Bobbers and Skyrmions in Epitaxial FeGe/Si(111) Films text January 2017
Magnetic microscopy and topological stability of homochiral Néel domain walls in a Pt/Co/AlOx trilayer journal December 2015
A strategy for the design of skyrmion racetrack memories journal October 2014
Tailoring magnetic energies to form dipole skyrmions and skyrmion lattices journal January 2017
A Study of Wall Structure for Bubble and Plate Domains in h.c.p. Cobalt Single Crystal Foils by 1 MeV High Voltage Lorentz Electron Microscopy journal August 1978
Experimental observation of chiral magnetic bobbers in B20-type FeGe journal April 2018
Electrical detection of single magnetic skyrmions in metallic multilayers at room temperature journal January 2018
Observation of stable Néel skyrmions in cobalt/palladium multilayers with Lorentz transmission electron microscopy journal March 2017
Electrically controlled pinning of Dzyaloshinskii-Moriya domain walls journal March 2016
Asymmetric magnetic domain-wall motion by the Dzyaloshinskii-Moriya interaction journal December 2013
Hybrid chiral domain walls and skyrmions in magnetic multilayers journal July 2018
Transmission Electron Microscopy book January 2009
Chiral magnetic order at surfaces driven by inversion asymmetry journal May 2007
Real-space observation of a two-dimensional skyrmion crystal journal June 2010
I n s i t u measurement of stress in Co/Cu, Co/Pd, and Co/Au compositionally modulated multilayer films journal November 1990
Lorentz microscopy of bubble domains and changes in domain wall state in hexaferrites journal November 1973
Electrically controlled pinning of Dzyaloshinskii-Moriya domain walls text January 2015
Chirality in Magnetic Multilayers Probed by the Symmetry and the Amplitude of Dichroism in X-Ray Resonant Magnetic Scattering journal January 2018
On the transport of intensity technique for phase retrieval journal December 2004
New Mechanism of Anisotropic Superexchange Interaction journal March 1960
Principles of Optics book January 1999
Asymmetric magnetic proximity effect in a Pd/Co/Pd trilayer system journal May 2016
Hybrid chiral domain walls and skyrmions in magnetic multilayers text January 2017
Accurate model of the stripe domain phase of perpendicularly magnetized multilayers journal May 2017
Observation of stable Neel skyrmions in Co/Pd multilayers with Lorentz transmission electron microscopy text January 2017
Soliton-like magnetic domain wall motion induced by the interfacial Dzyaloshinskii–Moriya interaction journal November 2015
Magnetic properties and structure of Pd/Co and Pd/Fe multilayers journal April 1987
Chiral bobbers and skyrmions in epitaxial FeGe/Si(111) films journal April 2018
Lorentz microscopy on amorphous films with perpendicular anisotropy as a function of temperature journal November 1976
The Determination of Domain Wall Thickness in Ferromagnetic Films by Electron Microscopy journal June 1962
Soliton-like magnetic domain wall motion induced by the interfacial Dzyaloshinskii-Moriya interaction text January 2015
On the use of divergent wall images in the fresnel mode of Lorentz microscopy for the measurement of the widths of very narrow domain walls journal May 1987
Towards full-resolution inline electron holography journal August 2014
Real-Space Observation of Skyrmion Lattice in Helimagnet MnSi Thin Samples journal February 2012
Electron microscopy of amorphous GdCo alloy thin films journal August 1973
Bubble domains in cobalt journal September 1971
Skyrmions in magnetic multilayers journal August 2017
Asymmetric skyrmion Hall effect in systems with a hybrid Dzyaloshinskii-Moriya interaction journal June 2018
Skyrmions in Magnetic Multilayers text January 2017
The design and verification of MuMax3 journal October 2014
Domain wall theory and exchange stiffness in Co/Pd multilayers journal May 1996
Nanoscale magnetic skyrmions in metallic films and multilayers: a new twist for spintronics journal June 2016
A thermodynamic theory of “weak” ferromagnetism of antiferromagnetics journal January 1958