Stoichiometry, spin fluctuations, and superconductivity in LaNiPO

被引：11
作者：
McQueen, T. M. [1 ]
Klimczuk, T. [2 ,3 ]
Williams, A. J. [1 ]
Huang, Q. [4 ]
Cava, R. J. [1 ]
机构：
[1] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA
[2] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
[3] Gdansk Univ Technol, Fac Appl Phys & Math, PL-80952 Gdansk, Poland
[4] Natl Inst Stand & Technol, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA
来源：
PHYSICAL REVIEW B | 2009年 / 79卷 / 17期
基金：
美国国家科学基金会;
关键词：
band structure; fluctuations in superconductors; lanthanum compounds; nickel compounds; specific heat; spin fluctuations; stoichiometry; CRYSTAL-STRUCTURE; MAGNETIC-PROPERTIES; PHASE-DIAGRAM; HEAT;
D O I：
10.1103/PhysRevB.79.172502
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Superconductivity in LaNiPO is disrupted by small (similar to 5%) amounts of nonstoichiometry on the lanthanum site, even though the electronic contribution to the heat capacity increases with increasing nonstoichiometry. All samples also exhibit specific-heat anomalies consistent with the presence of ferromagnetic spin fluctuations (T-sf approximate to 14 K). Comparison of layered nickel phosphide and nickel borocarbide superconductors reveals different structure-property correlations in the two families.
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页数：4
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