Enhanced ferromagnetism and conductivity of ultrathin freestanding La_0.7Sr_0.3MnO₃ membranes

We report a universal method to transfer freestanding La_0.7Sr_0.3MnO₃ membranes to target substrates. The 4-unit-cell-thick freestanding La_0.7Sr_0.3MnO₃ membrane exhibits the enhanced ferromagnetism, conductivity and out-of-plane magnetic anisotropy, which otherwise shows nonmagnetic/antiferromagnetic and insulating behavior due to the intrinsic epitaxial strain. This work facilitates the promising applications of ultrathin freestanding correlated oxide membranes in electronics and spintronics.