First-principles study of thermodynamical properties of random magnetic overlayers on fcc-Cu(001) substrate
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F13%3A00422581" target="_blank" >RIV/68378271:_____/13:00422581 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1103/PhysRevB.87.075452" target="_blank" >http://dx.doi.org/10.1103/PhysRevB.87.075452</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevB.87.075452" target="_blank" >10.1103/PhysRevB.87.075452</a>
Alternative languages
Result language
angličtina
Original language name
First-principles study of thermodynamical properties of random magnetic overlayers on fcc-Cu(001) substrate
Original language description
We present a theoretical study of the thermodynamical properties of a fcc-Cu(001) substrate covered by an iron-cobalt monolayer as well as by an incomplete iron layer. The effective two-dimensional Heisenberg Hamiltonian is constructed from first principles and the properties of exchange interactions are investigated. The Curie temperatures are estimated using the Monte Carlo (MC) simulations and compared with a simplified approach using the random-phase approximation (RPA) in connection with the virtual-crystal approach (VCA) to treat randomness in exchange integrals. Calculations indicate a weak maximum of the Curie temperature as a function of composition of the iron-cobalt overlayer. While a good quantitative agreement between RPA-VCA and MC was found for the iron-cobalt monolayer, the RPA-VCA approach fails for low coverage due to the magnetic percolation effect. We also present a study of the effect of alloy disorder on the shape of magnon spectra of random overlayers.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BE - Theoretical physics
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GA202%2F09%2F0775" target="_blank" >GA202/09/0775: Multiscale theory of surface alloys and inhomogeneities at solid surfaces</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2013
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. B
ISSN
1098-0121
e-ISSN
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Volume of the periodical
87
Issue of the periodical within the volume
7
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
"075452-1"-"075452-7"
UT code for WoS article
000315482500011
EID of the result in the Scopus database
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