Commensurate spin density wave in LaFeAsO:: A local probe study

被引：262

作者：

Klauss, H. -H. ^{[1
]}

Luetkens, H. ^{[2
]}

Klingeler, R. ^{[3
]}

Hess, C. ^{[3
]}

Litterst, F. J. ^{[4
]}

Kraken, M. ^{[4
]}

Korshunov, M. M. ^{[5
,6
]}

Eremin, I. ^{[5
,7
]}

Drechsler, S. -L. ^{[3
]}

Khasanov, R. ^{[2
]}

Amato, A. ^{[2
]}

Hamann-Borrero, J. ^{[3
]}

Leps, N. ^{[3
]}

Kondrat, A. ^{[3
]}

Behr, G. ^{[3
]}

Werner, J. ^{[3
]}

Buechner, B. ^{[3
]}

机构：

[1] Tech Univ Dresden, Inst Festkorperphys, D-01069 Dresden, Germany

[2] Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland

[3] Leibniz Inst Festkorper & Weskstoffforsch IFW, D-01171 Dresden, Germany

[4] Tech Univ Carolo Wilhelmina Braunschweig, Inst Phys Kondensierten Mat, D-38106 Braunschweig, Germany

[5] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany

[6] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia

[7] Tech Univ Carolo Wilhelmina Braunschweig, Inst Math Phys, D-38106 Braunschweig, Germany

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.101.077005

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a detailed study on the magnetic order in the undoped mother compound LaFeAsO of the recently discovered Fe-based superconductor LaFeAsO1-xFx. In particular, we present local probe measurements of the magnetic properties of LaFeAsO by means of Fe-57 Mossbauer spectroscopy and muon-spin relaxation in zero external field along with magnetization and resistivity studies. These experiments prove a commensurate static magnetic order with a strongly reduced ordered moment of 0.25(5)mu(B) at the iron site below T-N=138 K, well separated from a structural phase transition at T-S=156 K. The temperature dependence of the sublattice magnetization is determined and compared to theory. Using a four-band spin density wave model both, the size of the order parameter and the quick saturation below T-N are reproduced.

引用

页数：4

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