Figure 4: Effects of magnetic fields on the magnetic and superconducting transitions under high pressure. | Nature Communications

Figure 4: Effects of magnetic fields on the magnetic and superconducting transitions under high pressure.

From: Dome-shaped magnetic order competing with high-temperature superconductivity at high pressures in FeSe

Figure 4

(a–d, i–l) ρ(T) curves at different magnetic fields applied parallel to the c axis. The magnetic transition temperature Tm is field independent and marked by the green arrow (a–d). At 6.3 GPa, the Tm anomaly is only visible at high fields (i). (e–h, m–p) H-T phase diagrams. The zero resistivity is attained below Tc and the line (determined by the peak in dρ/dT(T)) is a lower bound of upper critical field Hc2. The sharp superconducting transitions under magnetic fields for P>6.3 GPa indicate narrowed regimes of the vortex liquid state.

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