@article{33575, author = {M Huijben and L.W Martin and Y.-H Chu and M.B Holcomb and P Yu and G Rijnders and D.H.A Blank and Ramamoorthy Ramesh}, title = {Critical thickness and orbital ordering in ultrathin La0.7 Sr0.3 MnO3 films}, abstract = {Detailed analysis of transport, magnetism, and x-ray absorption spectroscopy measurements on ultrathin La0.7 Sr0.3 MnO3 films with thicknesses from 3 to 70 unit cells resulted in the identification of a lower critical thickness for a nonmetallic nonferromagnetic layer at the interface with the SrTiO3 (001) substrate of only three unit cells (∼12 Å). Furthermore, linear-dichroism measurements demonstrate the presence of a preferred (x2 - y2) in-plane orbital ordering for all layer thicknesses without any orbital reconstruction at the interface. A crucial requirement for the accurate study of these ultrathin films is a controlled growth process, offering the coexistence of layer-by-layer growth and bulklike magnetic/transport properties. © 2008 The American Physical Society.}, year = {2008}, journal = {Physical Review B - Condensed Matter and Materials Physics}, volume = {78}, number = {9}, issn = {10980121}, doi = {10.1103/PhysRevB.78.094413}, note = {cited By 289}, language = {eng}, }