Anisotropic spin-density distribution and magnetic anisotropy of strained La 1−x Sr x MnO 3 thin films: angle-dependent x-ray magnetic circular dichroism

摘要: Magnetic anisotropies of ferromagnetic thin films are induced by epitaxial strain from the substrate via strain-induced anisotropy in orbital magnetic moment and that spatial distribution spin-polarized electrons. However, preferential occupation metallic La1−xSr x MnO3 (LSMO) studied x-ray linear dichroism (XLD) has always been found out-of-plane for both tensile compressive hence irrespective anisotropy. In order to resolve this mystery, we directly probed electrons LSMO under angle-dependent circular (XMCD). Anisotropy spin-density was be in-plane strain, consistent with observed The ubiquitous seen XLD is attributed spin-up spin-down orbitals surface dead layer. Enabled an angular dependent magneto-optical technique, states La1-xSr probed. Goro Shibata University Tokyo colleagues Japan use (XMCD) technique study grown on SrTiO3 (STO) or LaAlO3 (LAO) substrate. different substrates provide either strain. modifies shapes layer, which can XMCD. results show film (compressive) (out-of-plane) distribution, spin at surface. This helps understand controlled related materials.