Symmetry of magnetic quantum tunneling in single molecule magnet Mn12-acetate

Physical Review Letters

Volumn 91, Issue 4, 2003, Pages

  Del Barco, E ^a   Kent, A D ^a   Rumberger, E M ^b   Hendrickson, D N ^b   Christou, G ^c  

^a POLYTECHNIC UNIVERSITY   (United States)

^b UNIVERSITY OF CALIFORNIA   (United States)

^c University of Florida   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

CHEMICAL ACTIVATION; ELECTRON TUNNELING; HALL EFFECT; MAGNETIC PROPERTIES; MAGNETS; MOLECULAR ORIENTATION; MOLECULES; QUANTUM THEORY; SUPERCONDUCTIVITY; THERMAL EFFECTS;

MAGNETIC QUANTUM TUNNELING; MOLECULAR SYMMETRY; PHASE EFFECT; SINGLE MOLECULE MAGNET;

MANGANESE COMPOUNDS;

EID: 0041379808     PISSN: 00319007     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

References (24)

1. J. R. Friedman, M. P. Sarachik, J. Tejada, and R. Ziolo, Phys. Rev. Lett. 76, 3830 (1996).
2. L. Thomas, F. Lionti, R. Ballou, D. Gatteschi, R. Sessoli, and B. Barbara, Nature (London) 383, 145 (1996).
3. D. Vion et al., Science 296, 886 (2000).
4. Y. Nakamura et al., Nature (London) 398, 786 (2002).
5. N. V. Prokof'ev and P. C. E. Stamp, Phys. Rev. Lett. 80, 5794 (1998).
6. J. M. Hernandez et al., Europhys. Lett. 35, 301 (1996).
7. C. Sangregorio, T. Ohm, C. Paulsen, R. Sessoli, and D. Gatteschi, Phys. Rev. Lett. 78, 4645 (1997).
8. A. L. Barra, D. Gatteschi, and R. Sessoli, Phys. Rev. B 56, 8192 (1997).
9. W. Wernsdordfer, R. Sessoli, and D. Gatteschi, Europhys. Lett. 47, 254 (1999).
10. L. Bokacheva, A. D. Kent, and M. A. Walters, Phys. Rev. Lett. 85, 4803 (2000).
11. I. Mirabeau et al., Phys. Rev. Lett. 83, 628 (1999).
12. S. Hill, J. A. A. Perenboom, N. S. Dalal, T. Hathaway, T. Stalcup, and J. S. Brooks, Phys. Rev. Lett. 80, 2453 (1998).
13. E. del Barco, N. Vernier, J. M. Hernandez, J. Tejada, E. M. Chudnovsky, E. Molins, and G. Bellesa, Europhys. Lett. 47, 722-728 (1999).
14. E. M. Chudnovsky and D. A. Garanin, Phys. Rev. Lett. 87, 187203 (2001).
15. A. Cornia, R. Sessoli, L. Sorace, D. Gatteschi, and A. L. Barra, Phys. Rev. Lett. 89, 257201 (2002).
16. K. M. Mertes et al., Phys. Rev. Lett. 87, 227205 (2001).
17. J. M. Hernandez, F. Torres, J. Tejada, and E. Molins, Phys. Rev. B 66, 161407 (2002).
18. E. del Barco, A. D. Kent, E. M. Rumberger, D. N. Hendrickson, and G. Christou, Europhys. Lett. 60, 768 (2002).
19. S. Hill, R. S. Edwards, S. I. Jones, J. M. North, and N. S. Dalal, Phys. Rev. Lett. 90, 217204 (2003).
20. 12, while minor changes in the hydrogen bonding interactions are expected.
21. A. D. Kent, S. von Molnar, S. Gider, and D. D. Awschalom, J. Appl. Phys. 76, 6656 (1994).
22. W. Wernsdorfer and R. Sessoli, Science 284, 133 (1999).
23. For fields parallel to the hard axis Berry phase oscillations are expected [22], leading to "zeros" in the tunnel splitting at certain fields. This would further increase the difference between the tunneling rates for medium and hard axes magnetic fields. Such significant changes in the rates for different field directions are not observed (see Fig. 3).
24. R. Sessoli (private communication).