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. 2020 Oct 14;10:17274. doi: 10.1038/s41598-020-74156-z

Figure 1.

Figure 1

Main panel: Magnetic field H variation of the DC critical current density Jc determined for the optimally doped specimen P-Ba122op and the overdoped single crystal P-Ba122od (of similar dimensions) from the descending branches of the magnetic hysteresis curves m(H) at the temperature T = 10 K plotted in the inset. The particular difference between the DC magnetic hysteresis curves m(H) from the inset is that in the case of P-Ba122od there is a wide H range of weak collective (elastic) pinning in the low-field quasi-ordered vortex solid (the Bragg vortex glass), followed by a precipitous increase of ∣m∣ at H ~ 60 kOe on the ascending m(H) branch.