Effect of thermal deformation on giant magnetoresistance of flexible spin valves grown on polyvinylidene fluoride membranes

Liu Luping^{1, 2, 3}, Zhan Qingfeng^{2, 3, †,}, Rong Xin^{2, 3}, Yang Huali^{2, 3}, Xie Yali^{2, 3}, Tan Xiaohua^{1, ‡,}, Li Run-wei^{2, 3, §,}

(a) Schematic diagram of the spin-valve structures. (b) Topography (5 μm×5 μm) of a PVDF membrane after being spin-coated with a negative photoresist (AR-P5350) layer. (c) GMR curves for SV-FeNi/FeNi, SV-FeNi/FeGa, SV-FeGa/FeNi, and SV-FeGa/FeGa prepared on Si. (d) Hysteresis loops under various temperatures for SV-FeGa/FeGa prepared on PVDF with EB∥ α₃₁. The arrows indicate the parallel or antiparallel alignment of magnetic moments in the free and pinned layers.