This title appears in the Scientific Report :
2013
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevB.88.214516 in citations.
Please use the identifier: http://hdl.handle.net/2128/5754 in citations.
Magnetic structure of superconducting Eu(Fe$_{0.82}$Co$_{0.18}$)$_2$As$_2$ as revealed by single-crystal neutron diffraction
Magnetic structure of superconducting Eu(Fe$_{0.82}$Co$_{0.18}$)$_2$As$_2$ as revealed by single-crystal neutron diffraction
The magnetic structure of superconducting Eu(Fe$_{0.82}$Co$_{0.18}$)$_2$As$_2$ is unambiguously determined by single-crystal neutron diffraction. A long-range ferromagnetic order of the $Eu^{2+}$ moments along the c direction is revealed below the magnetic phase transition temperature $T_C$=17 K. In...
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Personal Name(s): | Jin, Wentao (Corresponding author) |
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Nandi, Shibabrata / Xiao, Yinguo / Su, Yixi / Zaharko, O / Guguchia, Z. / Bukowski, Z. / Price, Stephen / Jiao, W. H. / Cao, G. H. / Brückel, Thomas | |
Contributing Institute: |
Streumethoden; PGI-4 JARA-FIT; JARA-FIT JCNS-FRM-II; JCNS-FRM-II Streumethoden; JCNS-2 |
Published in: | Physical Review B Physical review / B, 88 88 (2013 2013) 21 21, S. 214516 214516 |
Imprint: |
College Park, Md.
APS
2013
|
DOI: |
10.1103/PhysRevB.88.214516 |
Document Type: |
Journal Article |
Research Program: |
JCNS In-house Research with PNI Neutrons Exploratory materials and phenomena Spin-based and quantum information |
Subject (ZB): | |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/5754 in citations.
The magnetic structure of superconducting Eu(Fe$_{0.82}$Co$_{0.18}$)$_2$As$_2$ is unambiguously determined by single-crystal neutron diffraction. A long-range ferromagnetic order of the $Eu^{2+}$ moments along the c direction is revealed below the magnetic phase transition temperature $T_C$=17 K. In addition, the antiferromagnetism of the $Fe^{2+}$ moments still survives and the tetragonal-to-orthorhombic structural phase transition is also observed, although the transition temperatures of the Fe spin-density-wave (SDW) order and the structural phase transition are significantly suppressed to $T_N$=70 K and $T_S$=90 K, respectively, compared to the parent compound EuFe$_2$As$_2$. We present microscopic evidence for the coexistence of the Eu ferromagnetism and the Fe SDW in the superconducting crystal. The superconductivity competes with the Fe SDW in Eu(Fe$_{0.82}$Co$_{0.18}$)$_2$As$_2$. Moreover, the comparison between Eu(Fe$_{1−x}$Co$_x$)$_2$As$_2$ and Ba(Fe$_{1−x}$Co$_x$)$_2$As$_2$ indicates a considerable influence of the rare-earth element Eu on the magnetism of the Fe sublattice. |