Distribution of Tunnel Splittings in Mn12 Acetate

K. M. Mertes, Yoko Suzuki, M. P. Sarachik, Y. Paltiel, H. Shtrikman, E. Zeldov, E. Rumberger, D. N. Hendrickson, G. Christou

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


In magnetic fields applied parallel to the anisotropy axis, the relaxation of the magnetization of Mn12-acetate measured for different sweep rates collapses onto a single scaled curve. The form of the scaling implies that the dominant symmetry-breaking process responsible for tunneling is a locally varying second-order transverse anisotropy, forbidden by tetragonal symmetry in the perfect crystal, which gives rise to a broad distribution of tunnel splittings in a real crystal of Mn12 acetate. Different forms applied to even- and odd-numbered steps provide a clear distinction between even resonances (associated with crystal anisotropy) and odd resonances (which require a transverse magnetic field).

Original languageAmerican English
Pages (from-to)227205-227205-4
JournalPhysical Review Letters
Issue number22
StatePublished - 26 Nov 2001
Externally publishedYes


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