NMR measurements of intrinsic spin susceptibility in LaFeAsO0.9F0.1

被引：15

作者：

Imai, Takashi ^{[1
,2
]}

Ahilan, Kanagasingham ^{[1
]}

Ning, Fanlong ^{[1
]}

McGuire, Michael A. ^{[3
]}

Sefat, Athena S. ^{[3
]}

Jin, Ronying ^{[3
]}

Sales, Brian C. ^{[3
]}

Mandrus, David ^{[3
]}

机构：

[1] McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada

[2] Canadian Inst Adv Res, Toronto, ON M5G 1Z8, Canada

[3] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2008年 / 77卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

iron pnictide superconductor; high temperature superconductivity; NMR;

D O I：

10.1143/JPSJS.77SC.47

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We will probe the intrinsic behavior of spin susceptibility chi(spin) in the LaFeAsO1-xFx superconductor (x similar to 0.1, T-c similar to 27 K) using F-19 and As-75 NMR techniques. Our new results firmly establish a pseudo-gap behavior with Delta(PG)/k(B) similar to 140 K. The estimated magnitude of chi(spin) at 290 K, chi(spin) similar to 1.8 x 10(-4) emu/mol-Fe, is approximately twice larger than that in high T-c cuprates. We also show that chi(spin) levels off below similar to 50 K down to T-c.

引用

页码：47 / 53

页数：7

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