On the phase diagram of UGe2

Details On the phase diagram of UGe2 On the phase diagram of UGe2

2011-02-24

arxiv.org/abs/1102.5034v2

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages

Scientific paper

The magneto-elastic mechanism of development of the first order type instability at the phase transition to the ferromagnet state in itinerant ferromagnet-superconductor UGe2 is discussed. The particular property of this material is the precipitous drop of the critical temperature at pressure increase near 14-15 kbar that drastically increases the temperature of the first order instability in respect to the critical temperature. This effect leading to transformation of the second order type transition to the first order one is determined also by the specific heat increase in the temperature interval of the development of critical fluctuations. After performing the necessary calculations and estimations using the parameters characterizing the properties of UGe2 we argue the effectiveness of this mechanism.

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