Intrinsic properties of stoichiometric LaFePO

T. M. McQueen, M. Regulacio, A. J. Williams, Q. Huang, J. W. Lynn, Y. S. Hor, D. V. West, M. A. Green, R. J. Cava

Research output: Contribution to journalArticlepeer-review

103 Scopus citations


DC and ac magnetization, resistivity, specific-heat, and neutron-diffraction data reveal that stoichiometric LaFePO is metallic and non-superconducting above T=0.35K, with γ=12.5 mJ mol K2. Neutron-diffraction data at room temperature and T=10K are well described by the stoichiometric, tetragonal ZrCuSiAs structure, and show no signs of structural distortions or long-range magnetic ordering to an estimated detectability limit of 0.07 μB /Fe. We propose a model based on the shape of the iron-pnictide tetrahedron that explains the differences between LaFePO and LaFeAsO, the parent compound of the recently discovered high-Tc oxyarsenides, which, in contrast, shows both structural and spin-density wave transitions.

Original languageEnglish (US)
Article number024521
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number2
StatePublished - Jul 29 2008

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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