(a) Sketch of the LCMO (x = 0.3)/PrBa₂Cu₃O₇/LCMO (x = 0.3) magnetic tunnel junctions and the test setup. Magnetic field was directed in-plane along the [110] direction (easy axis of the harder top layer), as according to drawing.^[146] (b) At low bias (100 mV, blue symbols) the minor loop shows the saturation state 1, the high resistance state 2 (which is due to misalignment of magnetic moments of top and bottom layers), and the low resistance 1’ where magnetic moments are aligned along the easy axis of the bottom layer. Notice that high 2 and low 1’ resistance states are stable in zero magnetic field at a temperature of 94 K.^[147] (c) Heterostructure and test setup schematics. (d) Spin asymmetry of Sample A after cooling in 700 mT without a bias and with a bias of −400 V, respectively.^[147]