Abstract
We report a -like interlayer antiferromagnetic order in films with large orthorhombic distortion . The biaxial lattice strain in epitaxial heterostructures of lowers the crystal symmetry of from tetragonal () to orthorhombic (), guiding the Ir pseudospin moment parallel to the elongated axis via magnetic anisotropy. From resonant x-ray scattering experiments, we observed an antiferromagnetic order in the orthorhombic film whose interlayer stacking pattern is inverted from that of the tetragonal crystal. This interlayer stacking is similar to that of the orthorhombic , implying that the asymmetric interlayer exchange interactions between and directions exceed the anisotropic interlayer pseudodipolar interaction. Our result suggests that strain-induced distortion can provide a delicate knob for tuning the long-range magnetic order in quasi-two-dimensional systems by evoking the competition between the interlayer exchange coupling and the pseudodipolar interaction.
- Received 13 September 2021
- Accepted 22 February 2022
DOI:https://doi.org/10.1103/PhysRevB.105.L100404
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