Glauber slow dynamics of the magnetization in a molecular Ising chain

Details Glauber slow dynamics of the magnetization in a molecular Ising chain Glauber slow dynamics of the magnetization in a molecular Ising chain

2001-06-12

arxiv.org/abs/cond-mat/0106224v2

Physics

Condensed Matter

Statistical Mechanics

4 pages, 4 figures (low resolution), 16 references. Submitted to Physical Review Letters

Scientific paper

10.1209/epl/i2002-00416-x

The slow dynamics (10^-6 s - 10^4 s) of the magnetization in the paramagnetic phase, predicted by Glauber for 1d Ising ferromagnets, has been observed with ac susceptibility and SQUID magnetometry measurements in a molecular chain comprising alternating Co{2+} spins and organic radical spins strongly antiferromagnetically coupled. An Arrhenius behavior with activation energy Delta=152 K has been observed for ten decades of relaxation time and found to be consistent with the Glauber model. We have extended this model to take into account the ferrimagnetic nature of the chain as well as its helicoidal structure.

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