Tuning magnetic coupling in Sr2IrO4 thin films with epitaxial strain. Journal Article uri icon

Overview

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.

publication date

  • April 11, 2014

Full Author List

  • Lupascu A; Clancy JP; Gretarsson H; Nie Z; Nichols J; Terzic J; Cao G; Seo SSA; Islam Z; Upton MH

Other Profiles

Additional Document Info

start page

  • 147201

volume

  • 112

issue

  • 14