Superconductivity in single crystals of LaFePO

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dc.creatorHamlin, J. J.
dc.creatorBaumbach, R. E.
dc.creatorZocco, D. A.
dc.creatorSayles, T. A.
dc.creatorMaple, M. B.
dc.date2008-06-09
dc.date2008-07-25
dc.date.accessioned2026-07-07T10:01:12Z
dc.date.available2026-07-07T10:01:12Z
dc.descriptionSingle crystals of the compound LaFePO were prepared using a flux growth technique at high temperatures. Electrical resistivity measurements reveal metallic behavior and a resistive transition to the superconducting state at a critical temperature T_c ~ 6.6 K. Magnetization measurements also show the onset of superconductivity near 6 K. In contrast, specific heat measurements manifest no discontinuity at T_c. These results lend support to the conclusion that the superconductivity is associated with oxygen vacancies that alter the carrier concentration in a small fraction of the sample, although superconductivity characterized by an unusually small gap value can not be ruled-out. Under applied magnetic fields, T_c is suppressed anisotropically for fields perpendicular and parallel to the ab-plane, suggesting that the crystalline anisotropy strongly influences the superconducting state. Preliminary high-pressure measurements show that T_c passes through a maximum of nearly 14 K at ~ 110 kbar, demonstrating that significantly higher T_c values may be achieved in the phosphorus-based oxypnictides.
dc.descriptionSubmitted to Journal of Physics: Condensed Matter
dc.identifierhttps://arxiv.org/abs/0806.1265
dc.identifierhttp://arxiv.org/abs/0806.1265
dc.identifierJ. Phys.: Condens. Matter 20, 365220 (2008)
dc.identifierdoi:10.1088/0953-8984/20/36/365220
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/168553
dc.subjectSuperconductivity
dc.subjectMaterials Science
dc.titleSuperconductivity in single crystals of LaFePO
dc.typetext

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