Spin–Orbit-Lattice Locking in Strain-Engineered Sr2FeReO6 Double Perovskites

Abstract

Abstract Ferromagnetic double perovskites utilizing d-orbitals exhibit appealing physical properties due to their unique electronic band structures, which involve a combination of 3d and 5d orbitals. These magnetic and electronic properties can be also manipulated by strain, thus resulting in spin-orbit-lattice locking. Here, we demonstrate that strain-assisted spin-orbit-lattice locking can be a powerful tool for modulating the magnetic and electronic properties in Sr2FeReO6, a 3d–5d ferromagnetic double perovskite. Intriguingly, pliable Re orbitals along with the crystallogrphic asymmetry exhibit strain-sign-dependent reversal of orbital polarization, leading to variations in magnetic anisotropy and electronic properties. This work provides valuable insights into the tunability of magnetism and transport characteristics in 3d–5d ferromagnetic double perovskite for the development of spintronic devices.