Slow Magnetic Relaxation in a Co (II)–Y (III) Single‐Ion Magnet with Positive Axial Zero‐Field Splitting Colacio Rodríguez, Enrique Co(II) Single ion magnet Compartmental ligand INS Positive axial ZFS This work was supported by the MINECO (Spain) (Project CTQ2011-24478), the Junta de Andalucía (FQM-195 and Project of excellence P08-FQM-03705), and the University of Granada. E.R. and E.Cr. thank MINECO grant No. CTQ2011-23862-C02-01 and Generalitat de Catalunya grant No. 2009SGR-1459, for financial support. We would like to thank Prof. Liviu Chibotaru for providing us the SINGLE_ANISO program and Dr. Andrew Ozarowski for the EPR simulation software. E.K.B. thanks the EPSRC and Leverhulme Trust for financial support. The NHMFL is funded by the NSF, DoE, and the state of Florida. J.C. acknowledges financial support by the Spanish Ministerio de Ciencia e Innovación through projects CTQ2010-15364, Molecular Nanoscience (Consolider Ingenio CSD2007-00010), and Generalitat Valenciana (PROMETEO/2009/108). W.W. acknowledges the ARN-PNANO project MolNanoSpin No. ANR-08-NANO- 002 and the ERC Advanced Grant MolNanoSpin No. 226558. J.K. acknowledges NSF grant DMR 1157490. The complex [Co(µ-L)(µ-OAc)Y(NO3)2], in which the Co(II) ion exhibits a D value of ~+45 cm-1 as determined by magnetic and inelastic neutron scattering experiments, exhibits slow magnetic relaxation and Single-Ion Magnet behaviour. 2020-07-03T07:33:26Z 2020-07-03T07:33:26Z 2013-08-26 journal article Published version: Colacio, E, Ruiz, J, Ruiz, E, Cremades, E, Krzystek, J, Carretta, S, Cano, J, Guidi, T, Wernsdorfer, W & Brechin, EK 2013, 'Slow Magnetic Relaxation in a Co(II) -Y(III) Single-Ion Magnet with Positive Axial ZeroField Splitting', Angewandte Chemie International Edition, vol. 52, no. 35, pp. 9130-9134. [https://doi.org/10.1002/anie.201304386] http://hdl.handle.net/10481/62844 10.1002/anie.201304386 eng http://creativecommons.org/licenses/by-nc-nd/3.0/es/ open access Atribución-NoComercial-SinDerivadas 3.0 España Wiley