arxiv: cond-mat/0012247 · v2 · submitted 2000-12-13 · ❄️ cond-mat.mes-hall

Abrupt Transition between Thermally-Activated Relaxation and Quantum Tunneling in a Molecular Magnet

K. M. Mertes , Y. Zhong , M. P. Sarachik , Y. Paltiel , H. Shtrikman , E. Zeldov , E. Rumberger , D. N. Hendrickson This is my paper

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keywords magneticrelaxationabruptquantumtransitiontunnelingacetatealong

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We report Hall sensor measurements of the magnetic relaxation of Mn$_{12}$ acetate as a function of magnetic field applied along the easy axis of magnetization. Data taken at a series of closely-spaced temperatures between 0.24 K and 1.4 K provide strong new evidence for an abrupt ``first-order'' transition between thermally-assisted relaxation and magnetic decay via quantum tunneling.

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Abrupt Transition between Thermally-Activated Relaxation and Quantum Tunneling in a Molecular Magnet

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