Magnetoresistance and atomic structure of ultrathin films of (formula presented) on (formula presented)

H. W. Zandbergen, T. Nojima, J. Aarts

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63 Citations (Scopus)


Ultrathin films (Formula presented) of (Formula presented) on (Formula presented) exhibit properties quite different from the bulk. They become ferromagnetically ordered around 150 K but remain insulating, instead of showing the insulator-to-ferromagnetic metal transition which occurs in bulk material or thicker films at this Ca concentration. Electron microscopy shows that such films are perfectly crystalline but have a crystal structure, imposed by the lattice mismatch with the substrate, which is different from that of the bulk or thick films. An important feature is a Jahn-Teller-like distortion of the (Formula presented) octahedra which is not present in the bulk and appears to be the cause of the changed physical properties.

Original languageEnglish
Pages (from-to)10259-10262
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number14
Publication statusPublished - 1999


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