Origin of slow magnetic relaxation in Kramers ions with non-uniaxial anisotropy

Nature Communications

Volumn 5, Issue , 2014, Pages

  Gómez Coca, Silvia ^a   Urtizberea, Ainhoa ^b   Cremades, Eduard ^a   Alonso, Pablo J ^b,c   Camón, Agustín ^b,c   Ruiz, Eliseo ^a   Luis, Fernando ^b,c  

^a UNIVERSITY OF BARCELONA   (Spain)

^b Instituto de Ciencia de Materiales de Aragón   (Spain)

^c UNIVERSITY OF ZARAGOZA   (Spain)

Author keywords

[No Author keywords available]

Indexed keywords

COBALT;

COBALT; ION; MAGNETIC ANISOTROPY; MAGNETIC FIELD; QUANTITATIVE ANALYSIS;

ANISOTROPY; ARTICLE; CALCULATION; CONTROLLED STUDY; DYNAMICS; ELECTRONUCLEAR SPIN ENTANGLEMENT; MAGNETIC FIELD; MAGNETISM; MOLECULAR MODEL; NON UNIAXIAL MAGNETIC ANISOTROPY; PHONON; PHYSICAL PHENOMENA; QUANTITATIVE ANALYSIS; SPIN DYNAMICS; SPIN LATTICE RELAXATION;

EID: 84903770184     PISSN: None     EISSN: 20411723     Source Type: Journal    
DOI: 10.1038/ncomms5300     Document Type: Article

References (27)

1. Sessoli, R., Gatteschi, D., Caneshi, A. & Novak, M. A. Magnetic bistability in a metal-ion cluster. Nature 365, 141-143 (1993).
2. Villain, J., Hartman-Boutron, F., Sessoli, R. & Rettori, A. Magnetic-relaxation in big magnetic molecules. Europhys. Lett. 27, 159-164 (1994).
3. Luis, F., Bartolomé, J. & Fernández, J. F. Resonant magnetic quantum tunneling through thermally activated states. Phys. Rev. B 57, 505-513 (1998). (Pubitemid 128481535)
4. Zadrozny, J. M. et al. Slow magnetic relaxation in a pseudotetrahedral cobalt(II) complex with easy-plane anisotropy. Chem. Commun. 48, 3927-3929 (2012).
5. Vallejo, J. et al. Field-Induced slow magnetic relaxation in a six-coordinate mononuclear cobalt(II) complex with a positive anisotropy. J. Am. Chem. Soc. 134, 15704-15707 (2012).
6. Colacio, E. et al. Slow magnetic relaxation in a Co-II-Y-III single-ion magnet with positive axial zero-field splitting. Angew. Chem. Int. Ed. 52, 9130-9134 (2013).
7. Gómez-Coca, S., Cremades, E., Aliaga-Alcalde, N. & Ruiz, E. Mononuclear single-molecule magnets: tailoring the magnetic anisotropy of first-row transition-metal complexes. J. Am. Chem. Soc. 135, 7010-7018 (2013).
8. Huang, W. et al. Field-induced slow relaxation of magnetization in a tetrahedral Co(II) complex with easy plane anisotropy. Dalton Trans. 42, 15326-15331 (2013).
9. Wu, D. et al. Tuning transverse anisotropy in CoIII-CoII-CoIII mixed-valence complex toward slow magnetic relaxation. Inorg. Chem. 52, 10976-10982 (2013).
10. Zadrozny, J. M. et al. Slow magnetization dynamics in a series of twocoordinate iron(II) complexes. Chem. Sci. 4, 125-138 (2013).
11. Orbach, R. Spin-lattice relaxation in rare-earth salts. Proc. R. Soc. A 264, 458-484 (1961).
12. Bencini, A., Benelli, C., Gatteschi, D. & Zanchini, C. Esr-spectra of lowsymmetry high-spin cobalt(II) complexes.6. 6-methylquinoline, pyridine, and water adducts of cobalt(II) acetylacetonate. Inorg. Chem. 19, 3027-3030 (1980).
13. Bullen, G. J. The crystal structure of cobalt(II) bisacetylacetone dihydrate. Acta Crystallogr. 12, 703-708 (1959).
14. Figgis, B. N., Gerloch, M., Lewis, J., Mabbs, F. E. & Webb, G. A. Magnetic behaviour of cubic-field 4t1g terms in lower symmetry. J. Chem. Soc. A 2086-2093 (1968).
15. Lohr, L. L., Miller, J. C. & Sharp, R. R. Electronic structure and magnetic properties of high-spin octahedral Co(II) complexes: Co(II)(acac)2(H2O)2. J. Chem. Phys. 111, 10148-10158 (1999). (Pubitemid 129590253)
16. Makinen, M. W. et al. Ground term splitting of high-spin Co2+ as a probe of coordination structure. 1 dependence of the splitting on coordination geometry. J. Am. Chem. Soc. 107, 5245-5255 (1985).
17. Pietrzyk, P., Srebro, M., Rado, M., Sojka, Z. & Michalak, A. Spin ground state and magnetic properties of cobalt(II): relativistic DFT calculations guided by EPR measurements of bis(2, 4-acetylacetonate)cobalt(II)- based complexes. J. Phys. Chem. A 115, 2316-2324 (2011).
18. Cole, K. S. & Cole, R. H. Dispersion and absorption in dielectrics I. Alternating current characteristics. J. Chem. Phys. 9, 341-351 (1941).
19. Van Vleck, J. H. Paramagnetic relaxation times for titanium and chrome alum. Phys. Rev. 57, 426-447 (1940).
20. Abragam, A. & Bleaney, B. Electron Paramagnetic Resonance of Transition Ions (Dover, 1970).
21. Dohm, V. & Fulde, P. Magnetoelastic interaction in rare earth systems. Z. Phys. B 21, 369-379 (1975).
22. Fernández, J. F., Luis, F. & Bartolomé, J. Time dependent specific heat of a magnetic quantum tunneling system. Phys. Rev. Lett. 80, 5659-5662 (1998). (Pubitemid 128626611)
23. Zadrozny, J. M. et al. Magnetic blocking in a linear iron(I) complex. Nat. Chem. 5, 577-581 (2013).
24. Rudolph, G. & Henry, M. C. Bis(2, 4-pentanedionato)zinc (zinc acetylacetonate). Inorg. Synth. 10, 74-77 (1967).
25. Sheldrick, G. M. A short history of SHELX. Acta Crystallogr. A 64, 112-122 (2008).
26. Sheldrick, G. M. A Computer Program for Crystal Structure Refinement (University of Göttingen, Germany, 1997).
27. Rodríguez-Carvajal, J. Recent advances in magnetic structure determination by neutron powder diffraction. Phys. B 192, 55-69 (1993).