Phase diagram of UCoGe

The temperature-pressure phase diagram of ferromagnetic superconductor UCoGe includes four phase transitions. They are between the paramagnetic and the ferromagnetic states with the subsequent transition in the superconducting ferromagnetic state and between the normal and the superconducting states...

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Bibliographic Details
Published in:Physical review. B 2017-03, Vol.95 (10), p.104501, Article 104501
Main Author: Mineev, V. P.
Format: Article
Language:English
Subjects:
Ferromagnetism
Magnetostatics
Phase diagrams
Phase transitions
Superconductivity
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Summary:The temperature-pressure phase diagram of ferromagnetic superconductor UCoGe includes four phase transitions. They are between the paramagnetic and the ferromagnetic states with the subsequent transition in the superconducting ferromagnetic state and between the normal and the superconducting states after which the transition to the superconducting ferromagnetic state has to occur. Here we have developed the Landau theory description of the phase diagram and established the specific ordering arising at each type of transition. The phase transitions to the ferromagnetic superconducting state are inevitably accompanied by the emergence of screening currents. The corresponding magnetostatics considerations allow for establishing the significant difference between the transition from the ferromagnetic to the ferromagnetic superconducting state and the transition from the superconducting to the ferromagnetic superconducting state.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.95.104501