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arXiv · 0805.2149

Intrinsic Properties of Stoichiometric LaOFeP

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
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Abstract

DC and ac magnetization, resistivity, specific heat, and neutron diffraction data reveal that stoichiometric LaOFeP is metallic and non-superconducting above T = 0.35 K, with gamma = 12.5 mJ/mol*K. Neutron diffraction data at room temperature and T = 10 K 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 uB/Fe. We propose a model, based on the shape of the iron-pnictide tetrahedron, that explains the differences between LaOFeP and LaOFeAs, the parent compound of the recently discovered high-Tc oxyarsenides, which, in contrast, shows both structural and spin density wave (SDW) transitions.

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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. 2008-05-14. Intrinsic Properties of Stoichiometric LaOFeP. https://doi.org/10.1103/physrevb.78.024521

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