Experimental determination of the non-extensive entropic parameter q

الأصل · EN

We show how to extract the q parameter from experimental data, considering an inhomogeneous magnetic system composed by many Maxwell-Boltzmann homogeneous parts, which after integration over the whole system recover the Tsallis non-extensivity. Analyzing the cluster distribution of La₀.₇Sr₀.₃MnO₃ manganite, obtained through scanning tunnelling spectroscopy, we measure the q parameter and predict the bulk magnetization with good accuracy. The connection between the Griffiths phase and non-extensivity is also considered. We conclude that the entropic parameter embodies information about the dynamics, the key role to describe complex systems.