Figure 2: Magnetic susceptibility and resistance.
From: Strain induced superconductivity in the parent compound BaFe2As2
(a) Temperature dependence of the dimensionless magnetic susceptibility χSC(T)=(m(T)−m(40 K))/VBa122H in the superconducting state of the films with different thickness, where m(T) is sample magnetic moment, VBa122 is the volume of the Ba122 layer and H is the applied magnetic field (data are not corrected for demagnetization factors). The inset shows the region of bulk SC. (b) Temperature dependence of the normalized resistance R(T)/R(40 K) of the investigated thin films in zero magnetic field. (c) The normal state susceptibility χn(T)=(m(T)–m(300 K))/VBa122H. The amplitude of the SDW anomaly at TN≈130 K is reduced in the thinner film (S60), which is partially strained. (d) Susceptibility and resistance for sample S10 indicating two superconducting regions (bulk SC and filamentary SC).
