Intrinsic properties of stoichiometric LaFePO

被引：105

作者：

McQueen, T. M. ^{[1
]}

Regulacio, M. ^{[1
]}

Williams, A. J. ^{[1
]}

Huang, Q. ^{[2
]}

Lynn, J. W. ^{[2
]}

Hor, Y. S. ^{[1
]}

West, D. V. ^{[1
]}

Green, M. A. ^{[2
,3
]}

Cava, R. J. ^{[1
]}

机构：

[1] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA

[2] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA

[3] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.78.024521

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

DC and ac magnetization, resistivity, specific-heat, and neutron-diffraction data reveal that stoichiometric LaFePO is metallic and non-superconducting above T=0.35 K, with gamma=12.5 mJ/mol K-2. Neutron-diffraction data at room temperature and T=10 K are well described by the stoichiometric, tetragonal ZrCuSiAs structure, and show no signs of structural distortions or long-range magnetic ordering to an estimated detectability limit of 0.07 mu(B)/Fe. We propose a model based on the shape of the iron-pnictide tetrahedron that explains the differences between LaFePO and LaFeAsO, the parent compound of the recently discovered high-Tc oxyarsenides, which, in contrast, shows both structural and spin-density wave transitions.

引用

页数：7

共 43 条

[11] Magnetic order close to superconductivity in the iron-based layered LaO1-xFxFeAs systems [J].