Periodic chiral magnetic domains in single-crystal nickel nanowires
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F18%3APU129820" target="_blank" >RIV/00216305:26620/18:PU129820 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1103/PhysRevMaterials.2.064406" target="_blank" >http://dx.doi.org/10.1103/PhysRevMaterials.2.064406</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevMaterials.2.064406" target="_blank" >10.1103/PhysRevMaterials.2.064406</a>
Alternative languages
Result language
angličtina
Original language name
Periodic chiral magnetic domains in single-crystal nickel nanowires
Original language description
We report on experimental and computational investigations of the domain structure of single-crystal Ni nanowires (NWs). The similar to 200x200x8000 nm(3) Ni NWs were grown by a thermal chemical vapor deposition technique that results in single-crystal structures. Magneto resistance measurements of individual NWs suggest the average magnetization points largely off the NW long axis at zero field. X-ray photo emission electronmicroscopy images obtained at room temperature show a well-defined periodic magnetization pattern along the surface of the nanowires with a period of lambda(avg) = 239 +/- 37 nm. Finite element micromagnetic simulations reveal that when the material parameters of the modeled system match those of nickel crystal at T = 10 K, an oscillatory magnetization configuration with a period closely matching experimental observation (lambda = 222 nm) is obtainable at remanence. This magnetization configuration involves a periodic array of alternating chirality vortex domains distributed along the length of the NW. Vortex formation is attributable to the relatively high cubic anisotropy of the single crystal Ni NW system at T = 10 K and its reduced structural dimensions. The periodic alternating chirality vortex state is a topologically protected metastable state, analogous to an array of 360 degrees domain walls in a thin strip. Simulations show that other remanent states are also possible, depending on the field history. At room temperature (T = 273 K), simulations show vortices are no longer stable due to the expected reduced cubic anisotropy of the system, suggesting a disparity between the fabricated and modeled nanowires. Negative uniaxial anisotropy and magnetoelastic effects in the presence of compressive biaxial strain are shown to promote and restore formation of vortices at room temperature.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
PHYSICAL REVIEW MATERIALS
ISSN
2475-9953
e-ISSN
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Volume of the periodical
2
Issue of the periodical within the volume
6
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
„064406-1“-„064406-8“
UT code for WoS article
000435449700002
EID of the result in the Scopus database
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