Many-Spin Interactions and Spin Excitations in Mn12

Details Many-Spin Interactions and Spin Excitations in Mn12 Many-Spin Interactions and Spin Excitations in Mn12

1998-07-13

arxiv.org/abs/cond-mat/9807176v1

Phys. Rev. B 59, No. 10, 6919 - 6926 (1 March 1999-II)

Physics

Condensed Matter

Materials Science

REVTeX, 9 pages, 4 figures

Scientific paper

10.1103/PhysRevB.59.6919

In this work, the many-spin interactions taking place in Mn12 large-spin clusters are extensively studied using the 8-spin model Hamiltonian, for which we determine the possible parameters based on experimental data. Account of the many-spin excitations satisfactorily explains positions of the neutron scattering peaks, results of EPR measurements and the temperature dependence of magnetic susceptibility. In particular, strong Dzyaloshinsky-Morya interactions are found to be important for description of neutron scattering data. The role of these interactions for the relaxation of the magnetization is qualitatively discussed.

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