Local Structure and It's Effect on The Ferromagnetic Properties of La$ {0.5}$Sr$ {0.5}$CoO$ 3$ thin films} - Condensed Matter > Strongly Correlated ElectronsReport as inadecuate




Local Structure and It's Effect on The Ferromagnetic Properties of La$ {0.5}$Sr$ {0.5}$CoO$ 3$ thin films} - Condensed Matter > Strongly Correlated Electrons - Download this document for free, or read online. Document in PDF available to download.

Abstract: We have used high-resolution Extended X-ray Absorption Fine-Structure anddiffraction techniques to measure the local structure of strainedLa$ {0.5}$Sr$ {0.5}$CoO$ 3$ films under compression and tension. The latticemismatch strain in these compounds affects both the bond lengths and the bondangles, though the larger effect on the bandwidth is due to the bond lengthchanges. The popular double exchange model for ferromagnetism in thesecompounds provides a correct qualitative description of the changes in Curietemperature $T C$, but quantitatively underestimates the changes. A microscopicmodel for ferromagnetism that provides a much stronger dependence on thestructural distortions is needed.



Author: C. K. Xie, J. I. Budnick, W. A. Hines, B. O. Wells, J. C. Woicik

Source: https://arxiv.org/







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