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Tunneling and EPR linewidths due to dislocations in Mn-12 acetate

D. A. Garanin, E. M. Chudnovsky

cond-mat.stat-mecharXiv:cond-mat/0107586

Abstract

We compute the width and shape of the EPR and tunneling resonances due to dislocations in Mn-12 acetate crystals. Uncorrelated dislocations produce the Gaussian shape of resonances while dislocations bound in pairs produce the Lorentzian shape. We stress that the uniaxial spin Hamiltonian together with crystal defects can explain the totality of experimental data on Mn-12.

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