Wydział Chemii

Grzegorz Kamieniarz

P. Kozłowski

Michał Antkowiak

P. Sobczak

Tomasz Ślusarski

D. M. Tomecka

A. Barasiński

B. Brzostowski

A. Drzewiński

Alina Bieńko

Jerzy Mroziński

2012

Acta Physica Polonica A

121

992-998

Naukowa

Angielski

Artykuł

nthispap erwereviewourresultsofcomprehensivestudyofmolecularnanomagnetsrecentlysynthesizedintheformofthechromium-basedmoleculesandbimetalliccopp er-containingchainsaswellaswepresentsomenewndings.Wefo cusoneectsofanisotropy,geometryandfrustrationapp earinginvariousthermo dynamicprop ertiesofthenanoscalemagnetswhicharedescrib edbyHeisenb erg-likespinmo delsandsimulatedbyaccuratenumericalmetho ds.Weshowthatb ond-dep endentexchangeanisotropyisneededtomo delmagnetictorqueintheCd-dop edchromiumring.Wearguethatonlyinthelimitofinniterings(n! 1)frustrationcanb econsideredastheopp ositetobipartitenessintheo ddnumb ered(3n9)s= 3=2quantumspinrings.Weanalysetheinuenceofexchangeinteractionsandanisotropyonmagneticsusceptibilityofbimetallic(S= 3=2,s= 1=2)chainscomp osedofCuionslinkedtodierent3dionsbyttingexp erimentaldata.WereachtheremarkableconsistencyofthedensityfunctionaltheoryestimatesofthemagneticcouplingsinCr8moleculeandprovidestrongsupp orttothespinmo delsexploitedintheliterature.

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