Critical behavior of Griffiths ferromagnets

Details Critical behavior of Griffiths ferromagnets Critical behavior of Griffiths ferromagnets

2006-03-20

arxiv.org/abs/cond-mat/0603533v2

Phys. Rev. Lett. 97, 137201 (2006)

Physics

Condensed Matter

Disordered Systems and Neural Networks

4 pages, 3 figures, Changed content

Scientific paper

10.1103/PhysRevLett.97.137201

From a heuristic calculation of the leading order essential singularity in the distribution of Yang-Lee zeroes, we obtain new scaling relations near the ferromagnetic-Griffiths transition, including the prediction of a discontinuity on the analogue of the critical isotherm. We show that experimental data for the magnetization and heat capacity of $\mathrm{La_{0.7}Ca_{0.3}MnO_3}$ are consistent with these predictions, thus supporting its identification as a Griffiths ferromagnet.

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