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RESEARCH PRODUCT

Single-crystal EPR spectroscopy of a Co(II) single-chain magnet

Stephen HillEugenio CoronadoJunjie LiuJuan M. Clemente-juanG. Mínguez EspallargasE. Del BarcoAsma Amjad

subject

Condensed matter physicsMagnetic domainChemistryMolecular physicslaw.inventionIonInorganic ChemistrylawExcited stateMagnetMaterials ChemistryPhysical and Theoretical ChemistryGround stateElectron paramagnetic resonanceSpin (physics)Single crystal

description

Abstract An electron paramagnetic resonance (EPR) study of a single crystal of Co II -based single-chain magnets (SCM) is presented. Discrete resonant absorptions are associated to the presence of magnetic domains within the chains of finite lengths determined by a competition between intra-chain exchange interactions and thermally excited single spin fluctuations. The results are interpreted as a transition from single spin dynamics at high temperature ( T  ∼20 K), associated to the Kramers doublet ground state of the individual Co II ions, to archetypical SCM dynamics at low temperatures, where intra-chain correlations form long magnetic domains, whose average length is imposed by the concentration of defects in the sample.

yearjournalcountryeditionlanguage
2013-12-01Polyhedron
https://doi.org/10.1016/j.poly.2013.04.044