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Title: Magnetic microstructure and magnetic properties of uniaxial itinerant ferromagnet Fe 3GeTe 2

Here, magnetic force microscopy was used to observe the magnetic microstructure of Fe 3GeTe 2 at 4 K on the (001) surface. The surface magnetic structure consists of a two-phase domain branching pattern that is characteristic for highly uniaxial magnets in the plane perpendicular to the magnetic easy axis. The average surface magnetic domain width D s = 1.3 μm determined from this pattern, in combination with intrinsic properties calculated from bulk magnetization data (the saturation magnetization M s = 376 emu/cm 3 and the uniaxial magnetocrystalline anisotropy constant K u = 1.46 × 10 7 erg/cm 3), was used to determine the following micromagnetic parameters for Fe 3GeTe 2 from phenomenological models: the domain wall energy γ w = 4.7 erg/cm 2, the domain wall thickness δ w = 2.5 nm, the exchange stiffness constant A ex = 0.95 × 10 –7 erg/cm, the exchange length l ex = 2.3 nm, and the critical single domain particle diameter d c = 470 nm.
Authors:
ORCiD logo [1] ;  [1] ;  [1] ;  [1] ;  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Report Number(s):
LA-UR-16-22303
Journal ID: ISSN 0021-8979; JAPIAU
Grant/Contract Number:
AC52-06NA25396; DEAC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 120; Journal Issue: 8; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1325649
Alternate Identifier(s):
OSTI ID: 1310827

León-Brito, Neliza, Bauer, Eric Dietzgen, Ronning, Filip, Thompson, Joe David, and Movshovich, Roman. Magnetic microstructure and magnetic properties of uniaxial itinerant ferromagnet Fe3GeTe2. United States: N. p., Web. doi:10.1063/1.4961592.
León-Brito, Neliza, Bauer, Eric Dietzgen, Ronning, Filip, Thompson, Joe David, & Movshovich, Roman. Magnetic microstructure and magnetic properties of uniaxial itinerant ferromagnet Fe3GeTe2. United States. doi:10.1063/1.4961592.
León-Brito, Neliza, Bauer, Eric Dietzgen, Ronning, Filip, Thompson, Joe David, and Movshovich, Roman. 2016. "Magnetic microstructure and magnetic properties of uniaxial itinerant ferromagnet Fe3GeTe2". United States. doi:10.1063/1.4961592. https://www.osti.gov/servlets/purl/1325649.
@article{osti_1325649,
title = {Magnetic microstructure and magnetic properties of uniaxial itinerant ferromagnet Fe3GeTe2},
author = {León-Brito, Neliza and Bauer, Eric Dietzgen and Ronning, Filip and Thompson, Joe David and Movshovich, Roman},
abstractNote = {Here, magnetic force microscopy was used to observe the magnetic microstructure of Fe3GeTe2 at 4 K on the (001) surface. The surface magnetic structure consists of a two-phase domain branching pattern that is characteristic for highly uniaxial magnets in the plane perpendicular to the magnetic easy axis. The average surface magnetic domain width Ds = 1.3 μm determined from this pattern, in combination with intrinsic properties calculated from bulk magnetization data (the saturation magnetization Ms = 376 emu/cm3 and the uniaxial magnetocrystalline anisotropy constant Ku = 1.46 × 107 erg/cm3), was used to determine the following micromagnetic parameters for Fe3GeTe2 from phenomenological models: the domain wall energy γw = 4.7 erg/cm2, the domain wall thickness δw = 2.5 nm, the exchange stiffness constant Aex = 0.95 × 10–7 erg/cm, the exchange length lex = 2.3 nm, and the critical single domain particle diameter dc = 470 nm.},
doi = {10.1063/1.4961592},
journal = {Journal of Applied Physics},
number = 8,
volume = 120,
place = {United States},
year = {2016},
month = {8}
}