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

Abstract Ferromagnetic double perovskites utilizing d-orbitals exhibit appealing physical properties due to their unique electronic band structures, which involve a combination of 3 d and 5 d 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 Sr 2 FeReO 6 , a 3 d –5 d 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 3 d –5 d ferromagnetic double perovskite for the development of spintronic devices.