Magnetoelastic coupling in the phase diagram of Ba1-xKxFe2As2 as seen via neutron diffraction

被引：85

作者：

Avci, S. ^{[1
]}

Chmaissem, O. ^{[1
,2
]}

Goremychkin, E. A. ^{[1
]}

Rosenkranz, S. ^{[1
]}

Castellan, J-P. ^{[1
]}

Chung, D. Y. ^{[1
]}

Todorov, I. S. ^{[1
]}

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

Claus, H. ^{[1
]}

Kanatzidis, M. G. ^{[1
,3
]}

Daoud-Aladine, A. ^{[4
]}

Khalyavin, D. ^{[4
]}

Osborn, R. ^{[1
]}

机构：

[1] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

[2] No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA

[3] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA

[4] Rutherford Appleton Lab, ISIS Pulsed Neutron & Muon Facil, Didcot OX11 0QX, Oxon, England

来源：

PHYSICAL REVIEW B | 2011年 / 83卷 / 17期

关键词：

MAGNETIC ORDER; SUPERCONDUCTIVITY; COEXISTENCE;

D O I：

10.1103/PhysRevB.83.172503

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report a high resolution neutron diffraction investigation of the coupling of structural and magnetic transitions in Ba1-xKxFe2As2. The tetragonal-orthorhombic and antiferromagnetic transitions are suppressed with potassium doping, falling to zero at x less than or similar to 0.24. However, unlike Ba(Fe1-xCox)(2)As-2, the two transitions are first order and coincident over the entire phase diagram, with a biquadratic coupling of the two order parameters. The phase diagram is refined showing that the onset of superconductivity is at x = 0.133 with all three phases coexisting until x <= 0.24.

引用

页数：4

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