Finite-Size effects in "Single Chain Magnets": an experimental and theoretical study

Details Finite-Size effects in "Single Chain Magnets": an experimental and theoretical study Finite-Size effects in "Single Chain Magnets": an experimental and theoretical study

2004-03-30

arxiv.org/abs/cond-mat/0403731v1

Phys. Rev. Lett. 92, 207204 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 5 figures. Physical Review Letters, accepted for publication

Scientific paper

10.1103/PhysRevLett.92.207204

The problem of finite size effects in s=1/2 Ising systems showing slow dynamics of the magnetization is investigated introducing diamagnetic impurities in a Co$^{2+}$-radical chain. The static magnetic properties have been measured and analyzed considering the peculiarities induced by the ferrimagnetic character of the compound. The dynamic susceptibility shows that an Arrhenius law is observed with the same energy barrier for the pure and the doped compounds while the prefactor decreases, as theoretically predicted. Multiple spins reversal has also been investigated.

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