Stoichiometry, Spin Fluctuations, and Superconductivity in LaNiPO

Details Stoichiometry, Spin Fluctuations, and Superconductivity in LaNiPO Stoichiometry, Spin Fluctuations, and Superconductivity in LaNiPO

2009-04-27

arxiv.org/abs/0904.4237v1

Phys. Rev. B 79, 172502 (2009)

Physics

Condensed Matter

Superconductivity

Submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.79.172502

Superconductivity in LaNiPO is disrupted by small (~5%) amounts of non-stoichiometry on the lanthanum site, even though the electronic contribution to the heat capacity increases with increasing non-stoichiometry. All samples also exhibit specific heat anomalies consistent with the presence of ferromagnetic spin fluctuations (Tsf ~ 14 K). Comparison of layered nickel phosphide and nickel borocarbide superconductors reveals different structure-property correlations in the two families.

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