7-11 July 2014
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=16&confId=34"><font color=#0000ff>SAIP2014 Proceedings published on 17 April 2015</font></a>

A microscopic theory of phase transitions

10 Jul 2014, 15:00
D Les 201

D Les 201

Oral Presentation Track A - Division for Physics of Condensed Matter and Materials DPCMM1


Dr Volkmar Nolting (Vaal University of Technology)

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A microscopic theory of phase transitions is presented that describes macroscopic phenomena on the basis of microscopic interactions between particles. It is shown that the equation of state p(T,V) of a gas and the spontaneous magnetization MS(T) of a ferromagnetic insulator only exhibit phase transitions in the thermodynamic limit thus describing an infinitely large system. There are no phase transitions observed in the case of a finite system. A Curie temperature is calculated in agreement with experimental realizations of the theoretical model. Furthermore, the results depend on the dimension d of the spin lattice thereby confirming the Mermin Wagner theorem.

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Dr Volkmar Nolting (Vaal University of Technology)

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