A 57Fe Moessbauer Spectroscopy Study of the 7 K Superconductor LaFePO

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dc.creatorTegel, Marcus
dc.creatorSchellenberg, Inga
dc.creatorPöttgen, Rainer
dc.creatorJohrendt, Dirk
dc.date2008-05-08
dc.date.accessioned2026-07-07T12:37:08Z
dc.date.available2026-07-07T12:37:08Z
dc.descriptionA polycrystalline sample of superconducting LaFePO was prepared in a tin flux at 1123 K. The structure was determined from single crystal data (ZrCuSiAs-type, P4/nmm, a = 3.9610(1), c = 8.5158(2) A, Z = 2) and the phase analysis was performed by the Rietveld method. LaFePO is Pauli-paramagnetic and becomes superconducting at 7 K after removing the ferromagnetic impurity phase Fe2P from the sample. 57Fe Moessbauer spectroscopy measurements at 298, 77, 4.2 and 4 K show single signals at isomer shifts around 0.35 mm/s, subject to weak quadrupole splitting. At 4 K, a symmetric line broadening appears, resulting from a small transferred magnetic hyperfine field of 1.15(1) T and accompanied by an angle of 54.7(5) between Bhf and Vzz, the main component of the electric field gradient tensor.
dc.descriptionsubmitted to Z. Naturforsch. B
dc.identifierhttps://arxiv.org/abs/0805.1208
dc.identifierhttp://arxiv.org/abs/0805.1208
dc.identifierZ. Naturforsch. B - Chem. Sci. 2008, 63, 1057-1061
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/218335
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleA 57Fe Moessbauer Spectroscopy Study of the 7 K Superconductor LaFePO
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