Pressure-temperature phase diagram of EuRbFe${}_4$As${}_4$ superconductor

Abstract

The pressure dependencies of the magnetic and superconducting transitions, as well as that of the superconducting upper critical field are reported for single crystalline EuRbFe${}_4$As${}_4$. Resistance measurements were performed under hydrostatic pressures up to 6.21 GPa and in magnetic fields up to 9 T. Zero-field-cool magnetization measurements were performed under hydrostatic pressures up to 1.24 GPa under 20 mT applied field. Superconducting transition temperature, $T_{\text{c}}$, up to 6.21 GPa and magnetic transition temperature, $T_{\text{M}}$, up to 1.24 GPa were obtained and a pressure-temperature phase diagram was constructed. Our results show that $T_{\text{c}}$ is monotonically suppressed upon increasing pressure. $T_{\text{M}}$ is linearly increased up to 1.24 GPa. For the studied pressure range, no signs of the crossing of $T_{\text{M}}$ and $T_{\text{c}}$ lines are observed. The normalized slope of the superconducting upper critical field is gradually suppressed with increasing pressure, which may be due to the continuous change of Fermi-velocity $v_F$ with pressure.

5 pages, 7 figures

References in corpus (6)

• Superconductivity and Phase Diagram in the Iron-based Arsenic-oxides ReFeAsO1-delta (Re = rare earth metal) without F-Doping
• Superconductivity on the border of weak itinerant ferromagnetism in UCoGe
• Electrical Resistivity and Specific Heat of EuFe2As2 Single Crystals: Magnetic homologue of SrFe2As2
• Metamagnetic transition in EuFe${}_2$As${}_2$ single crystals
• Magnetic ground state of superconducting Eu(Fe0.88Ir0.12)2As2: A combined neutron diffraction and first-principles calculation study
• RbEu(Fe${}_{1-x}$Ni${}_x$)${}_4$As${}_4$: From a ferromagnetic superconductor to a superconducting ferromagnet

Cited by in corpus (3)

• Coexisting spin resonance and long-range magnetic order of Eu in EuRbFe${}_4$As${}_4$
• Helical structures in layered magnetic superconductors due to indirect exchange interactions mediated by interlayer tunneling
• Spin waves and high-frequency response in layered superconductors with helical magnetic structure