J Phys Condens Matter. 2013 Dec 11;25(49):496003. doi: 10.1088/0953-8984/25/49/496003. Epub 2013 Nov 01.

Structural, magnetic and electrical properties of SrRuO3 films and SrRuO3/SrTiO3 superlattices.

Journal of physics. Condensed matter : an Institute of Physics journal

F Bern, M Ziese, A Setzer, E Pippel, D Hesse, I Vrejoiu

PMID: 24184982 DOI: 10.1088/0953-8984/25/49/496003

Abstract

SrRuO3 films and SrRuO3/SrTiO3 superlattices grown on SrTiO3(001) were studied by structural, magnetic, magnetoresistance and Hall effect measurements. The superlattices showed heteroepitaxial growth with coherent interfaces and a Ru/Ti diffusion region of 1-1.5 unit cells. The resistivity had metallic character above a critical thickness of 3-4 unit cells, becoming insulating below. There was no hint of conduction processes along the interfaces. Both magnetization and magnetoresistance measurements showed an increase of the magnetic anisotropy, consistent with magnetostriction effects. The magnetostriction coefficient was estimated as λ100 ∼ 1.4 × 10(-4). Three unit cell thick SrRuO3 layers in SrRuO3/SrTiO3 superlattices were found to have tetragonal crystal symmetry, as deduced from the sign change of the anomalous Hall constant.

Publication Types

• Journal Article
• Research Support, Non-U.S. Gov't