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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