skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Creation and annihilation of topological meron pairs in in-plane magnetized films

Abstract

Merons which are topologically equivalent to one-half of skyrmions can exist only in pairs or groups in two-dimensional (2D) ferromagnetic (FM) systems. The recent discovery of meron lattice in chiral magnet Co 8Zn 9Mn 3 raises the immediate challenging question that whether a single meron pair, which is the most fundamental topological structure in any 2D meron systems, can be created and stabilized in a continuous FM film? Utilizing winding number conservation, we develop a new method to create and stabilize a single pair of merons in a continuous Py film by local vortex imprinting from a Co disk. By observing the created meron pair directly within a magnetic field, we determine its topological structure unambiguously and explore the topological effect in its creation and annihilation processes. Our work opens a pathway towards developing and controlling topological structures in general magnetic systems without the restriction of perpendicular anisotropy and Dzyaloshinskii-Moriya interaction.

Authors:
 [1];  [2];  [3];  [4];  [5];  [5];  [5];  [6];  [6]; ORCiD logo [6];  [2];  [7];  [8]; ORCiD logo [5]
  1. Chinese Academy of Sciences (CAS), Beijing (China); Univ. of California, Berkeley, CA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Daegu Gyeongbuk Inst. of Science and Technology (DGIST) (Korea)
  4. Korea Inst. of Science and Technology (KIST), Seoul (Korea)
  5. Univ. of California, Berkeley, CA (United States)
  6. Ulsan National Institute of Science and Technology, Ulsan (Korea, Republic of)
  7. Korea Research Inst. of Standards and Science, Daejeon (Korea)
  8. Peking Univ., Beijing (China)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Science Foundation (NSF); National Research Foundation of Korea (NRF); National Natural Science Foundation of China (NNSFC); Ministry of Science, ICT and Future Planning (Korea); National Research Council of Science and Technology (NST); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Scientific User Facilities Division
OSTI Identifier:
1582357
Grant/Contract Number:  
[AC02-05CH11231; DMR-1504568; 2015M3D1A1070467; 20151A5A1009962; 61505243; 2017R1A4A1015323; 19-BT-02; CAP-16-01-KIST]
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
[ Journal Volume: 10; Journal Issue: 1]; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Magnetic devices; Magnetic properties and materials; Spintronics

Citation Formats

Gao, N., Je, S.-G., Im, M.-Y., Choi, J. W., Yang, M., Li, Q., Wang, T. Y., Lee, S., Han, H.-S., Lee, K.-S., Chao, W., Hwang, C., Li, J., and Qiu, Z. Q. Creation and annihilation of topological meron pairs in in-plane magnetized films. United States: N. p., 2019. Web. doi:10.1038/s41467-019-13642-z.
Gao, N., Je, S.-G., Im, M.-Y., Choi, J. W., Yang, M., Li, Q., Wang, T. Y., Lee, S., Han, H.-S., Lee, K.-S., Chao, W., Hwang, C., Li, J., & Qiu, Z. Q. Creation and annihilation of topological meron pairs in in-plane magnetized films. United States. doi:10.1038/s41467-019-13642-z.
Gao, N., Je, S.-G., Im, M.-Y., Choi, J. W., Yang, M., Li, Q., Wang, T. Y., Lee, S., Han, H.-S., Lee, K.-S., Chao, W., Hwang, C., Li, J., and Qiu, Z. Q. Fri . "Creation and annihilation of topological meron pairs in in-plane magnetized films". United States. doi:10.1038/s41467-019-13642-z. https://www.osti.gov/servlets/purl/1582357.
@article{osti_1582357,
title = {Creation and annihilation of topological meron pairs in in-plane magnetized films},
author = {Gao, N. and Je, S.-G. and Im, M.-Y. and Choi, J. W. and Yang, M. and Li, Q. and Wang, T. Y. and Lee, S. and Han, H.-S. and Lee, K.-S. and Chao, W. and Hwang, C. and Li, J. and Qiu, Z. Q.},
abstractNote = {Merons which are topologically equivalent to one-half of skyrmions can exist only in pairs or groups in two-dimensional (2D) ferromagnetic (FM) systems. The recent discovery of meron lattice in chiral magnet Co8Zn9Mn3 raises the immediate challenging question that whether a single meron pair, which is the most fundamental topological structure in any 2D meron systems, can be created and stabilized in a continuous FM film? Utilizing winding number conservation, we develop a new method to create and stabilize a single pair of merons in a continuous Py film by local vortex imprinting from a Co disk. By observing the created meron pair directly within a magnetic field, we determine its topological structure unambiguously and explore the topological effect in its creation and annihilation processes. Our work opens a pathway towards developing and controlling topological structures in general magnetic systems without the restriction of perpendicular anisotropy and Dzyaloshinskii-Moriya interaction.},
doi = {10.1038/s41467-019-13642-z},
journal = {Nature Communications},
number = [1],
volume = [10],
place = {United States},
year = {2019},
month = {12}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Save / Share:

Works referenced in this record:

Magnetic bimerons as skyrmion analogues in in-plane magnets
journal, February 2019


A thermodynamic theory of “weak” ferromagnetism of antiferromagnetics
journal, January 1958


Dynamics of bimeron skyrmions in easy-plane magnets induced by a spin supercurrent
journal, June 2019


Demonstration of 12 nm Resolution Fresnel Zone Plate Lens based Soft X-ray Microscopy
journal, January 2009

  • Chao, Weilun; Kim, Jihoon; Rekawa, Senajith
  • Optics Express, Vol. 17, Issue 20
  • DOI: 10.1364/OE.17.017669

The design and verification of MuMax3
journal, October 2014

  • Vansteenkiste, Arne; Leliaert, Jonathan; Dvornik, Mykola
  • AIP Advances, Vol. 4, Issue 10
  • DOI: 10.1063/1.4899186

Nucleation, stability and current-induced motion of isolated magnetic skyrmions in nanostructures
journal, October 2013


Dynamics of the Bloch point in an asymmetric permalloy disk
journal, February 2019


Compact merons and skyrmions in thin chiral magnetic films
journal, March 2011


Phase-locking of magnetic vortices mediated by antivortices
journal, June 2009


Antivortex domain walls observed in permalloy rings via magnetic force microscopy
journal, February 2009


Observation of room-temperature magnetic skyrmions and their current-driven dynamics in ultrathin metallic ferromagnets
journal, February 2016

  • Woo, Seonghoon; Litzius, Kai; Krüger, Benjamin
  • Nature Materials, Vol. 15, Issue 5
  • DOI: 10.1038/nmat4593

Direct observation of imprinted antiferromagnetic vortex states in CoO/Fe/Ag(001) discs
journal, January 2011

  • Wu, J.; Carlton, D.; Park, J. S.
  • Nature Physics, Vol. 7, Issue 4
  • DOI: 10.1038/nphys1891

Topology of spin meron pairs in coupled Ni/Fe/Co/Cu(001) disks
journal, July 2016


Skyrmion fractionalization and merons in chiral magnets with easy-plane anisotropy
journal, June 2015


Topological properties and dynamics of magnetic skyrmions
journal, December 2013


Magnetic skyrmion logic gates: conversion, duplication and merging of skyrmions
journal, March 2015

  • Zhang, Xichao; Ezawa, Motohiko; Zhou, Yan
  • Scientific Reports, Vol. 5, Issue 1
  • DOI: 10.1038/srep09400

Vortices in thin ferromagnetic films and the skyrmion number
journal, January 2007


Vortex Crystals with Chiral Stripes in Itinerant Magnets
journal, October 2016

  • Ozawa, Ryo; Hayami, Satoru; Barros, Kipton
  • Journal of the Physical Society of Japan, Vol. 85, Issue 10
  • DOI: 10.7566/JPSJ.85.103703

Blowing magnetic skyrmion bubbles
journal, June 2015


Magnetic Vortex Core Observation in Circular Dots of Permalloy
journal, August 2000


Magnetic vortex core reversal by excitation with short bursts of an alternating field
journal, November 2006

  • Van Waeyenberge, B.; Puzic, A.; Stoll, H.
  • Nature, Vol. 444, Issue 7118
  • DOI: 10.1038/nature05240

Real-space observation of a two-dimensional skyrmion crystal
journal, June 2010


Direct Observation of Unconventional Topological Spin Structure in Coupled Magnetic Discs
journal, February 2012


Tailoring magnetic energies to form dipole skyrmions and skyrmion lattices
journal, January 2017


Topology and Origin of Effective Spin Meron Pairs in Ferromagnetic Multilayer Elements
journal, April 2013


Observation of magnetic vortex pairs at room temperature in a planar α-Fe2O3/Co heterostructure
journal, June 2018


Magnetic stripes and skyrmions with helicity reversals
journal, May 2012

  • Yu, X.; Mostovoy, M.; Tokunaga, Y.
  • Proceedings of the National Academy of Sciences, Vol. 109, Issue 23
  • DOI: 10.1073/pnas.1118496109

Quantized Hall Conductance in a Two-Dimensional Periodic Potential
journal, August 1982


Skyrmion Lattice in a Chiral Magnet
journal, February 2009


Elusive spin textures discovered
journal, December 2018


Optical manipulation of magnetic vortices visualized in situ by Lorentz electron microscopy
journal, July 2018


Colloquium: Topological insulators
journal, November 2010


Creating an Artificial Two-Dimensional Skyrmion Crystal by Nanopatterning
journal, April 2013


Transformation between meron and skyrmion topological spin textures in a chiral magnet
journal, December 2018


Spontaneous atomic-scale magnetic skyrmion lattice in two dimensions
journal, July 2011

  • Heinze, Stefan; von Bergmann, Kirsten; Menzel, Matthias
  • Nature Physics, Vol. 7, Issue 9
  • DOI: 10.1038/nphys2045

Skyrmion lattice with a giant topological Hall effect in a frustrated triangular-lattice magnet
journal, August 2019


X-ray magnetic circular dichroism—A versatile tool to study magnetism
journal, October 2014


Spontaneous skyrmion ground states in magnetic metals
journal, August 2006

  • Rößler, U. K.; Bogdanov, A. N.; Pfleiderer, C.
  • Nature, Vol. 442, Issue 7104, p. 797-801
  • DOI: 10.1038/nature05056

Magnetic antiskyrmions above room temperature in tetragonal Heusler materials
journal, August 2017

  • Nayak, Ajaya K.; Kumar, Vivek; Ma, Tianping
  • Nature, Vol. 548, Issue 7669
  • DOI: 10.1038/nature23466

Writing and Deleting Single Magnetic Skyrmions
journal, August 2013


Magnetic force microscopy observation of antivortex core with perpendicular magnetization in patterned thin film of permalloy
journal, June 2002

  • Shigeto, K.; Okuno, T.; Mibu, K.
  • Applied Physics Letters, Vol. 80, Issue 22
  • DOI: 10.1063/1.1483386

Exchange Explosions: Magnetization Dynamics during Vortex-Antivortex Annihilation
journal, October 2006


Ordering, metastability and phase transitions in two-dimensional systems
journal, April 1973

  • Kosterlitz, J M; Thouless, D J
  • Journal of Physics C: Solid State Physics, Vol. 6, Issue 7, p. 1181-1203
  • DOI: 10.1088/0022-3719/6/7/010

Multiple- q States and the Skyrmion Lattice of the Triangular-Lattice Heisenberg Antiferromagnet under Magnetic Fields
journal, January 2012


Soft X-ray microscopy of nanomagnetism
journal, January 2006


Model for a Quantum Hall Effect without Landau Levels: Condensed-Matter Realization of the "Parity Anomaly"
journal, October 1988


Anisotropic Superexchange Interaction and Weak Ferromagnetism
journal, October 1960


Tailoring the topology of an artificial magnetic skyrmion
journal, August 2014

  • Li, J.; Tan, A.; Moon, K. W.
  • Nature Communications, Vol. 5, Issue 1
  • DOI: 10.1038/ncomms5704

Realization of ground-state artificial skyrmion lattices at room temperature
journal, October 2015

  • Gilbert, Dustin A.; Maranville, Brian B.; Balk, Andrew L.
  • Nature Communications, Vol. 6, Issue 1
  • DOI: 10.1038/ncomms9462