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Phys. Rev. B 65, 212401 (2002) [4 pages]

Ground-state tunneling in Mn12-acetate

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K. M. Mertes, Yoko Suzuki, and M. P. Sarachik
Physics Department, City College of the City University of New York, New York, New York 10031

Y. Paltiel, H. Shtrikman, and E. Zeldov
Department of Condensed Mater Physics, The Weizmann Institute of Science, Rehovot 76100, Israel

E. M. Rumberger and D. N. Hendrickson
Department of Chemistry and Biochemistry, University of California at San Diego, La Jolla, California 92093

G. Christou
Department of Chemistry, University of Florida, Gainesville, Florida 32611

Received 10 August 2001; revised 1 October 2001; published 14 May 2002

We report Hall sensor measurements of the magnetic relaxation of Mn12-acetate as a function of magnetic field applied along the easy axis of magnetization for a series of closely spaced temperatures between 0.24 K and 1.9 K. The occasional absence (or suppression) of ground-state tunneling under conditions where one would expect it to be readily observable is attributed to the presence of a broad distribution of tunnel splittings.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.65.212401
DOI:
10.1103/PhysRevB.65.212401
PACS:
75.45.+j, 75.50.Xx
 
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