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Theory of weakly coupled two-dimensional magnets
Uppsala University.ORCID iD: 0000-0003-4341-5663
2006 (English)In: Journal of Physics: Condensed Matter, ISSN 0953-8984, E-ISSN 1361-648X, Vol. 18, no 20, 4853-4860 p.Article in journal (Refereed) Published
Abstract [en]

We demonstrate that the experimental findings of the magnetic properties of the weakly coupled trilayer system Ni4/CuN/Co2are reproduced by a theory that combines first principles calculations of the exchange interactions in a classical Heisenberg model with Monte Carlo simulations. Through an analysis of the spin–spin correlation function we show that two distinct temperatures can be identified; a higher temperature where long range magnetic order disappears and a lower temperature where the spin–spin correlation of the Ni atoms undergoes a drastic change. We argue that our findings hold in general for 'weak exchange link' systems.

Place, publisher, year, edition, pages
IOP , 2006. Vol. 18, no 20, 4853-4860 p.
Keyword [en]
Computer simulation, Functions, Magnetic couplings, Magnetization, Monte Carlo methods, Nickel alloys, Optical correlation, Thermal effects
National Category
Condensed Matter Physics
URN: urn:nbn:se:kth:diva-64534DOI: 10.1088/0953-8984/18/20/010ISI: 000238373800010OAI: diva2:483084
QC 20120202Available from: 2012-01-24 Created: 2012-01-24 Last updated: 2012-02-02Bibliographically approved

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Bergqvist, Lars
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