Spin dynamics of molecular nanomagnets unravelled at atomic scale by four-dimensional inelastic neutron scattering

Nature Physics

Volumn 8, Issue 12, 2012, Pages 906-911

  Baker, Michael L ^a,b   Guidi, Tatiana ^c   Carretta, Stefano ^d   Ollivier, Jacques ^a   Mutka, Hannu ^a   Güdel, Hans U ^e   Timco, Grigore A ^b   Mcinnes, Eric J L ^b   Amoretti, Giuseppe ^d   Winpenny, Richard E P ^b   Santini, Paolo ^d  

^a INSTITUT LAUE LANGEVIN   (France)

^b UNIVERSITY OF MANCHESTER   (United Kingdom)

^c RUTHERFORD APPLETON LABORATORY   (United Kingdom)

^d UNIVERSITY OF PARMA   (Italy)

^e UNIVERSITY OF BERN   (Switzerland)

Author keywords

[No Author keywords available]

Indexed keywords

INELASTIC NEUTRON SCATTERING; NANOMAGNETICS; QUANTUM THEORY;

ANTIFERROMAGNETIC RING; DEGREE OF VALIDITY; MOLECULAR NANOMAGNETS; QUANTUM DYNAMICS; QUANTUM FLUCTUATION; RECIPROCAL SPACE; SPIN HAMILTONIAN; SPIN SYSTEMS;

SPIN DYNAMICS;

EID: 84870611288     PISSN: 17452473     EISSN: 17452481     Source Type: Journal    
DOI: 10.1038/nphys2431     Document Type: Article

References (51)

1. Krause, S., Berbil-Bautista, L., Herzog, G., Bode, M. & Wiesendanger, R. Current-induced magnetization switching with a spin-polarized scanning tunneling microscope. Science 317, 1537-1540 (2007). (Pubitemid 47417430)
2. Mannini, M. et al. Magnetic memory of a single-molecule quantum magnet wired to a gold surface. Nature Mater. 8, 194-197 (2009).
3. Bogani, L. & Wernsdorfer, W. Molecular spintronics using single-molecule magnets. Nature Mater. 7, 179-186 (2008). (Pubitemid 351311291)
4. Loth, S. et al. Controlling the state of quantum spins with electric currents. Nature Phys. 6, 340-344 (2010).
5. Sanvito, S. Molecular spintronics. Chem. Soc. Rev. 40, 3336-3355 (2011).
6. Khajetoorians, A. A., Wiebe, J., Chilian, B. & Wiesendanger, R. Realizing all-Spin-based logic operations atom by atom. Science 332, 1062-1064 (2011).
7. Candini, A., Klyatskaya, S., Ruben, M., Wernsdorfer, W. & Affronte, M. Graphene spintronic devices with molecular nanomagnets. Nano Lett. 11, 2634-2639 (2011).
8. Leuenberger, M. N. & Loss, D. Quantum computing in molecular magnets. Nature 410, 789-793 (2001). (Pubitemid 32303771)
9. Troiani, F. et al. Molecular engineering of antiferromagnetic rings for quantum computation. Phys. Rev. Lett. 94, 207208 (2005).
10. Hirjibehedin, C. F., Lutz, C. P. & Heinrich, A. J. Spin coupling in engineered atomic structures. Science 312, 1021-1024 (2006).
11. Khajetoorians, A. A. et al. Atom-by-Atom engineering and magnetometry of tailored nanomagnets. Nature Phys. 8, 497-503 (2012).
12. Loth, S., Baumann, S., Lutz, C. P., Eigler, D. M. & Heinrich, A. J. Bistability in atomic-Scale antiferromagnets. Science 335, 196-199 (2012).
13. Gatteschi, D., Sessoli, R. & Villain, J. Molecular Nanomagnets (Oxford Univ. Press, 2006).
14. Mannini, M. et al. Quantum tunnelling of the magnetization in a monolayer of oriented single-molecule magnets. Nature 468, 417-421 (2010).
15. Corradini, V. et al. Magnetic anisotropy of Cr7Ni spin clusters on surfaces. Adv. Funct. Mater. 22, 3706-3713 (2012).
16. Friedman, J. R., Sarachik, M. R., Tejada, J. & Ziolo, R. Macroscopic measurement of resonant magnetization tunneling in high-Spin molecules. Phys. Rev. Lett. 76, 3830-3833 (1996). (Pubitemid 126630667)
17. Thomas, L. et al. Macroscopic quantum tunnelling of magnetization in a single crystal of nanomagnets. Nature 383, 145-148 (1996).
18. Wernsdorfer, W. & Sessoli, R. Quantum phase interference and parity effects in magnetic molecular clusters. Science 284, 133-135 (1999). (Pubitemid 29282063)
19. Schnack, J. Effects of frustration on magnetic molecules: A survey from Olivier Kahn until today. Dalton Trans. 39, 4677-4686 (2010).
20. Chiolero, A. & Loss, D. Macroscopic quantum coherence in molecular magnets. Phys. Rev. Lett. 80, 169-172 (1998).
21. Waldmann, O. et al. Quantum phase interference and Néel-vector tunneling in antiferromagnetic molecular wheels. Phys. Rev. Lett. 102, 157202 (2009).
22. Lehmann, J., Gaita-Ario, A., Coronado, E. & Loss, D. Spin qubits with electrically gated polyoxometalate molecules. Nature Nanotech. 2, 312-317 (2007). (Pubitemid 46882972)
23. Trif, M., Troiani, F., Stepanenko, D. & Loss, D. Spin-Electric coupling in molecular magnets. Phys. Rev. Lett. 101, 217201 (2008).
24. Santini, P., Carretta, S., Troiani, F. & Amoretti, G. Molecular nanomagnets as quantum simulators. Phys. Rev. Lett. 107, 230502 (2011).
25. Wernsdorfer, W., Aliaga-Alcalde, N., Hendrickson, D. N. & Christou, G. Exchange-biased quantum tunnelling in a supramolecular dimer of single-molecule magnets. Nature 416, 406-409 (2002). (Pubitemid 34272870)
26. Hill, S., Edwards, R. S., Aliaga-Alcalde, N. & Christou, G. Quantum coherence in an exchange-coupled dimer of single-molecule magnets. Science 302, 1015-1018 (2003). (Pubitemid 37386187)
27. Timco, G. et al. Engineering the coupling between molecular spin qubits by coordination chemistry. Nature Nanotech. 4, 173-178 (2009).
28. Candini, A. et al. Entanglement in supramolecular spin systems of two weakly coupled antiferromagnetic rings (purple-Cr7Ni). Phys. Rev. Lett. 104, 037203 (2010).
29. Ardavan, A. et al. Will spin-Relaxation times in molecular magnets permit quantum information processing? Phys. Rev. Lett. 98, 057201 (2007).
30. Schlegel, C., van Slageren, J., Manoli, M., Brechin, E. K. & Dressel, M. Direct observation of quantum coherence in single-molecule magnets. Phys. Rev. Lett. 101, 147203 (2008).
31. Bertaina, S. et al. Quantum oscillations in a molecular magnet. Nature 453, 203-206 (2008). (Pubitemid 351667986)
32. Wedge, C. J. et al. Chemical engineering of molecular qubits. Phys. Rev. Lett. 108, 107204 (2012).
33. Van Slageren, J. et al. Magnetic anisotropy of the antiferromagnetic ring [Cr8F8Piv16]. Chem. Eur. J. 8, 277-285 (2002).
34. Santini, P. et al. Spin dynamics and tunneling of the Néel vector in the Fe10 magnetic wheel. Phys. Rev. B 71, 184405 (2005).
35. Carretta, S. et al. Microscopic spin Hamiltonian of a Cr8 antiferromagnetic ring from inelastic neutron scattering. Phys. Rev. B 67, 094405 (2003).
36. Meier, F. & Loss, D. Thermodynamics and spin-Tunneling dynamics in ferric wheels with excess spin. Phys. Rev. B 64, 224411 (2001).
37. Carretta, S. et al. Topology and spin dynamics in magnetic molecules. Phys. Rev. B 72, 060403 (2005).
38. Waldmann, O., Guidi, T., Carretta, S., Mondelli, C. & Dearden, A. L. Elementary excitations in the cyclic molecular nanomagnet Cr8. Phys. Rev. Lett. 91, 237202 (2003).
39. Schnack, J. & Luban, M. Rotational modes in molecular magnets with antiferromagnetic Heisenberg exchange. Phys. Rev. B 63, 014418 (2000).
40. Waldmann, O. Spin dynamics of finite antiferromagnetic Heisenberg spin rings. Phys. Rev. B 65, 024424 (2001).
41. Waldmann, O. et al. Exchange-coupling constants, spin density map, and Q dependence of the inelastic neutron scattering intensity in single-molecule magnets. Phys. Rev. B 75, 174438 (2007).
42. Marshall, W. & Lovesey, S. W. Theory of Thermal Neutron Scattering (Oxford Univ. Press, 1971).
43. Ollivier, J. & Mutka, H. IN5 cold neutron time-Of-flight spectrometer, prepared to tackle single crystal spectroscopy. J. Phys. Soc. Jpn 80, SB003 (2011).
44. Bewley, R. J., Taylor, J. W. & Bennington, S. M. LET, a cold neutron multi-Disk chopper spectrometer at ISIS. Nucl. Instrum. Meth. Phys. Res. A 637, 128-134 (2011).
45. Perring, T. G., Ewings, R. A. & Duijn, J. V. Horace: Visualising and manipulating S(q;!) measured in all four dimensions. http://horace.isis.rl.ac. uk. (2009).
46. Hallberg, K., Wang, X. Q. G., Horsch, P. & Moreo, A. Critical behavior of the S D 3=2 antiferromagnetic Heisenberg chain. Phys. Rev. Lett. 76, 4955-4958 (1996). (Pubitemid 126631956)
47. Cador, O. et al. The magnetic Möbius strip: Synthesis, structure, and magnetic studies of odd-numbered antiferromagnetically coupled wheels. Angew. Chem. 116, 5308-5312 (2004).
48. Schröder, C. et al. Competing spin phases in geometrically frustrated magnetic molecules. Phys. Rev. Lett. 94, 017205 (2005).
49. Furukawa, Y. et al. Evidence of spin singlet ground state in the frustrated antiferromagnetic ring Cr8Ni. Phys. Rev. B 79, 134416 (2009).
50. Kenzelmann, M. et al. Structure of end states for a haldane spin chain. Phys. Rev. Lett. 90, 087202 (2003).
51. Gerbeleu, N. V. et al. Octanuclear chromium(III) fluoro-Trimethylacetatea macrocyclic complex. Dokl. Akad. Nauk. SSSR 313, 1459-1462 (1990).