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A Van der Waals Interface Hosting Two Groups of Magnetic Skyrmions

Journal Article · · Advanced Materials
 [1];  [2];  [3];  [4];  [5];  [5];  [5];  [6];  [7];  [7];  [3];  [3];  [2];  [8];  [7]
  1. Massachusetts Institute of Technology (MIT), Cambridge, MA (United States); OSTI
  2. University of California, Riverside, CA (United States)
  3. Georgetown University, Washington, DC (United States)
  4. Nanjing Tech University (China)
  5. Chinese Academy of Sciences (CAS), Beijing (China)
  6. Massachusetts Institute of Technology (MIT), Cambridge, MA (United States); Army Research Laboratory, Adelphi, MD (United States)
  7. Massachusetts Institute of Technology (MIT), Cambridge, MA (United States)
  8. University of California, Los Angeles, CA (United States)

Multiple magnetic skyrmion phases add an additional degree of freedom for skyrmion-based ultrahigh-density spin memory devices. Extending the field to 2D van der Waals magnets is a rewarding challenge, where the realizable degree of freedoms (e.g., thickness, twist angle, and electrical gating) and high skyrmion density result in intriguing new properties and enhanced functionality. In this work, a van der Waals interface, formed by two 2D ferromagnets Cr2Ge2Te6 and Fe3GeTe2 with a Curie temperature of ≈65 and ≈205 K, respectively, hosting two groups of magnetic skyrmions, is reported. Two sets of topological Hall effect signals are observed below 6s0 K when Cr2Ge2Te6 is magnetically ordered. These two groups of skyrmions are directly imaged using magnetic force microscopy, and supported by micromagnetic simulations. Interestingly, the magnetic skyrmions persist in the heterostructure with zero applied magnetic field. The results are promising for the realization of skyrmionic devices based on van der Waals heterostructures hosting multiple skyrmion phases.

Research Organization:
University of New Hampshire, Durham, NH (United States); Massachusetts Institute of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); Army Research Office (ARO); National Science Foundation (NSF); US Army Research Laboratory (ARL)
Grant/Contract Number:
SC0020221
OSTI ID:
1976205
Journal Information:
Advanced Materials, Journal Name: Advanced Materials Journal Issue: 16 Vol. 34; ISSN 0935-9648
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

References (40)

Anatomy of Skyrmionic Textures in Magnetic Multilayers journal February 2019
Magnetic Proximity Effect in Graphene/CrBr 3 van der Waals Heterostructures journal March 2020
Ising-Type Magnetic Ordering in Atomically Thin FePS 3 journal November 2016
Strong Proximity Josephson Coupling in Vertically Stacked NbSe 2 –Graphene–NbSe 2 van der Waals Junctions journal September 2017
Skyrmions in the Moiré of van der Waals 2D Magnets journal October 2018
Nanoscale magnetic skyrmions in metallic films and multilayers: a new twist for spintronics journal June 2016
Magnetic skyrmions: advances in physics and potential applications journal June 2017
Discovery of intrinsic ferromagnetism in two-dimensional van der Waals crystals journal April 2017
Layer-dependent ferromagnetism in a van der Waals crystal down to the monolayer limit journal June 2017
Electrical gate control of spin current in van der Waals heterostructures at room temperature journal July 2017
Realization of ground-state artificial skyrmion lattices at room temperature journal October 2015
Observation of room-temperature magnetic skyrmions and their current-driven dynamics in ultrathin metallic ferromagnets journal February 2016
Topological properties and dynamics of magnetic skyrmions journal December 2013
Skyrmions on the track journal March 2013
Néel-type skyrmion in WTe2/Fe3GeTe2 van der Waals heterostructure journal July 2020
Coexistence of distinct skyrmion phases observed in hybrid ferromagnetic/ferrimagnetic multilayers journal December 2020
Two-dimensional itinerant ferromagnetism in atomically thin Fe3GeTe2 journal August 2018
Ferroelectrically tunable magnetic skyrmions in ultrathin oxide heterostructures journal November 2018
Electrical detection of single magnetic skyrmions in metallic multilayers at room temperature journal January 2018
Van der Waals heterostructures for spintronics and opto-spintronics journal July 2021
Proximity-induced superconducting gap in the quantum spin Hall edge state of monolayer WTe2 journal March 2020
Gate-tunable room-temperature ferromagnetism in two-dimensional Fe3GeTe2 journal October 2018
Magnetism in two-dimensional van der Waals materials journal October 2018
Spin–orbit-driven band inversion in bilayer graphene by the van der Waals proximity effect journal June 2019
Topological superconductivity in a van der Waals heterostructure journal December 2020
Controlling the magnetic anisotropy in Cr2Ge2Te6 by electrostatic gating journal June 2020
Large exchange splitting in monolayer graphene magnetized by an antiferromagnet journal August 2020
The design and verification of MuMax3 journal October 2014
A repulsive skyrmion chain as a guiding track for a racetrack memory journal November 2018
Raman spectroscopy of atomically thin two-dimensional magnetic iron phosphorus trisulfide (FePS 3 ) crystals journal August 2016
Competing antiferromagnetism in a quasi-2D itinerant ferromagnet: Fe 3 GeTe 2 journal November 2016
Néel-type skyrmions and their current-induced motion in van der Waals ferromagnet-based heterostructures journal March 2021
Induced Ising spin-orbit interaction in metallic thin films on monolayer WSe2 journal March 2019
Topological Hall Effect in the A Phase of MnSi journal May 2009
Two-channel anomalous Hall effect in SrRuO 3 journal May 2020
Interface-induced phenomena in magnetism journal June 2017
Colloquium : Spintronics in graphene and other two-dimensional materials journal June 2020
Skyrmion Lattice in a Chiral Magnet journal February 2009
Spin Transfer Torques in MnSi at Ultralow Current Densities journal December 2010
Blowing magnetic skyrmion bubbles journal June 2015