Fig. 2: Layer-dependent metamagnetism and even-odd effects in thin-layer CCPS.
From: Ferrielectricity controlled widely-tunable magnetoelectric coupling in van der Waals multiferroics
a Tunneling current It vs in-plane magnetic field H∥ characteristics of a representative bilayer MTJ (BL-S44). BL-S44 exhibits a CAFM saturation field of 3.3 T, which is typical for BL devices. Here, green and orange arrows indicate the H∥ ramping directions. b Illustration of the multiple spin-filter effect in vdW magnets with interlayer AFM ordering. c T-dependent TMR vs H∥ of BL-S44, showing the dwindling of the CAFM saturation field when approaching TN. d 2D contour plotting of the first derivative of TMR (dR/dH) vs H∥ and T for BL-S44. By taking the derivative, the magnetic phase diagram of BL CCPS is clearly revealed. e T-dependent TMR vs H∥ of quintuple-layer MTJ (5L-S12), showing the same dwindling of Hsat when approaching TN. f 2D contour of dR/dH vs H∥ and T for 5L-S12. Below 2 T, the magnetic phase diagram of odd-layer CCPS is characterized by a low-field perfect collinear AFM zone, i.e., the odd-layer effect.
