Magnetic structure of the Eu2+ moments in superconducting EuFe2(As1-xPx)2 with x = 0.19
S. Nandi, W. T. Jin, Y. Xiao, Y. Su, S. Price, W. Schmidt, K., Schmalzl, T. Chatterji, H. S. Jeevan, P. Gegenwart, and Th. Br\"uckel
TL;DR
This study uses neutron scattering to determine the magnetic structure of Eu2+ moments in superconducting EuFe2(As1-xPx)2 with x=0.19, revealing their alignment and magnetic properties in the superconducting state.
Contribution
First detailed neutron scattering analysis of Eu2+ magnetic structure in EuFe2(As1-xPx)2 with x=0.19, clarifying magnetic ordering and impurity phases.
Findings
Eu2+ moments align along c axis below 19 K
Ordered moment of Eu2+ is 6.6 mu_B
No iron magnetic order detected
Abstract
The magnetic structure of the Eu2+ moments in the superconducting EuFe2(As1-xPx)2 sample with x = 0.19 has been determined using neutron scattering. We conclude that the Eu2+ moments are aligned along the c direction below T_C = 19.0(1) K with an ordered moment of 6.6(2) mu_B in the superconducting state. An impurity phase similar to the underdoped phase exists within the bulk sample which orders antiferromagnetically below T_N = 17.0(2) K. We found no indication of iron magnetic order, nor any incommensurate magnetic order of the Eu2+ moments in the sample.
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