Intrinsic Properties of Stoichiometric LaFePo
Abstract
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.
Recommended Citation
T. M. McQueen et al., "Intrinsic Properties of Stoichiometric LaFePo," Physical review B: Condensed matter and materials physics, vol. 78, no. 2, American Physical Society (APS), Jul 2008.
The definitive version is available at https://doi.org/10.1103/PhysRevB.78.024521
Department(s)
Physics
International Standard Serial Number (ISSN)
1098-0121
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2008 American Physical Society (APS), All rights reserved.
Publication Date
01 Jul 2008
