AI Article Synopsis
- The study investigates x-ray scattering techniques on thin films of Sr2IrO4 that are under different types of strain, showcasing the films' unique magnetic properties compared to bulk material.
- The films exhibit anisotropic magnetic correlations, meaning the magnetic interactions vary significantly depending on the direction, with stronger correlations in-plane than out-of-plane.
- The effects of compressive and tensile strain on the films are highlighted, as compressive strain lowers the temperature for magnetic ordering while tensile strain has the opposite effect, and these changes are linked to alterations in bond lengths.
Article Abstract
We report x-ray resonant magnetic scattering and resonant inelastic x-ray scattering studies of epitaxially strained Sr2IrO4 thin films. The films were grown on SrTiO3 and (LaAlO3)0.3(Sr2AlTaO6)0.7 substrates, under slight tensile and compressive strains, respectively. Although the films develop a magnetic structure reminiscent of bulk Sr2IrO4, the magnetic correlations are extremely anisotropic, with in-plane correlation lengths significantly longer than the out-of-plane correlation lengths. In addition, the compressive (tensile) strain serves to suppress (enhance) the magnetic ordering temperature TN, while raising (lowering) the energy of the zone-boundary magnon. Quantum chemical calculations show that the tuning of magnetic energy scales can be understood in terms of strain-induced changes in bond lengths.
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| http://dx.doi.org/10.1103/PhysRevLett.112.147201 | DOI Listing |
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