This title appears in the Scientific Report :
2016
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevB.94.184513 in citations.
Please use the identifier: http://hdl.handle.net/2128/13075 in citations.
Phase diagram of Eu magnetic ordering in Sn-flux-grown Eu ( Fe 1 − x Co x ) 2 As 2 single crystals
Phase diagram of Eu magnetic ordering in Sn-flux-grown Eu ( Fe 1 − x Co x ) 2 As 2 single crystals
The magnetic ground state of the Eu2+ moments in a series of Eu(Fe1−xCox)2As2 single crystals grown from the Sn flux has been investigated in detail by neutron diffraction measurements. Combined with the results from the macroscopic properties (resistivity, magnetic susceptibility and specific heat)...
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Personal Name(s): | Jin, Wentao (Corresponding author) |
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Xiao, Yinguo / Bukowski, Z. / Su, Y. / Nandi, S. / Sazonov, A. P. / Meven, M. / Zaharko, O. / Demirdis, S. / Nemkovskiy, Kirill / Schmalzl, K. / Tran, Lan Maria / Guguchia, Z. / Feng, E. / Fu, Z. / Brückel, Th. | |
Contributing Institute: |
JARA-FIT; JARA-FIT Streumethoden; PGI-4 Streumethoden; JCNS-2 JCNS-FRM-II; JCNS-FRM-II |
Published in: | Physical Review B Physical review / B, 94 94 (2016 2016) 18 18, S. 184513 184513 |
Imprint: |
Woodbury, NY
Inst.
2016
|
DOI: |
10.1103/PhysRevB.94.184513 |
Document Type: |
Journal Article |
Research Program: |
Jülich Centre for Neutron Research (JCNS) FRM II / MLZ Quantum Condensed Matter: Magnetism, Superconductivity Controlling Collective States |
Subject (ZB): | |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/13075 in citations.
The magnetic ground state of the Eu2+ moments in a series of Eu(Fe1−xCox)2As2 single crystals grown from the Sn flux has been investigated in detail by neutron diffraction measurements. Combined with the results from the macroscopic properties (resistivity, magnetic susceptibility and specific heat) measurements, a phase diagram describing how the Eu magnetic order evolves with Co doping in Eu(Fe1−xCox)2As2 is established. The ground-state magnetic structure of the Eu2+ spins is found to develop from the A-type antiferromagnetic (AFM) order in the parent compound, via the A-type canted AFM structure with some net ferromagnetic (FM) moment component along the crystallographic c direction at intermediate Co doping levels, finally to the pure FM order at relatively high Co doping levels. The ordering temperature of Eu declines linearly at first, reaches the minimum value of 16.5(2) K around x=0.100(4), and then reverses upwards with further Co doping. The doping-induced modification of the indirect Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction between the Eu2+ moments, which is mediated by the conduction d electrons on the (Fe,Co)As layers, as well as the change of the strength of the direct interaction between the Eu2+ and Fe2+ moments, might be responsible for the change of the magnetic ground state and the ordering temperature of the Eu sublattice. In addition, for Eu(Fe1−xCox)2As2 single crystals with 0.10≤x≤0.18, strong ferromagnetism from the Eu sublattice is well developed in the superconducting state, where a spontaneous vortex state is expected to account for the compromise between the two competing phenomena. |