Fig. 1: Magneto-transport and magnetization measurements to establish existence and utility of SEC in GdN/V/GdN systems.
From: Bistable and absolute switching driven by superconducting exchange coupling
a A cartoon depiction of a typical SPSV multi-layered stack wire-bonded for four probe measurements. b Color map of 11 nm V thickness sample, where several Resistance (R) vs in plane external magnetic field (μ0H) sweeps in the sequence +25 mT to −25 mT and from −25 mT to +25 mT (termed downward and upward sweeps respectively) were performed with fixed temperatures; at 5 mK intervals from 2.15 K to 2.4 K. The color map shows the parts of MR measurements corresponding only to 0 to −25 mT, and 0 to +25 mT, from the downward and upward sweeps respectively. c Top panel shows MH loops of the 11 nm SPSV, measured at various temperatures. Inset to top panel of c shows resistance (R) vs temperature (T) measured when the relative orientation of the magnets is in P (+25 mT) and AP (−5.5 mT) configuration. Lower panel shows R vs H sweeps at various temperatures. d Demonstration of nonvolatile zero field bistable states in the 11 nm SPSV. e Measured value of \({\Delta T}_{c}\) of the 11 nm SPSV as a function of angle between saturation magnetization vectors of the two GdN layers, plotted along with an ideal \(\cos\frac{\theta }{2}\) functional behavior of \({\Delta T}_{c}\).
