Line Plot from Scientific Research

Time-averaged voltage V as a function of external magnetic field μ 0 H ⊥ for the d.c. current I -biased Nb/Mn 3 Ge/Nb JJs with barrier spacing d s value of 199 nm, taken above (8 K) and below (2 K) the superconducting transition of the JJs. In these measurements, we apply fixed I that is similar to the zero-field Josephson critical current I c ( μ 0 H ⊥ = 0) of each JJ to straightforwardly visualize how the supercurrent spin-valve effect depends on d s . Note that μ 0 H ⊥ (≤|3 mT|) is applied perpendicular to the kagome plane of the Mn 3 Ge barrier, and the JJ data in a – c are identical to what we used for our prior study 20.

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