Magnetic structure of the Eu2+ moments in superconducting EuFe2(As1-xPx)(2) with x=0.19

ISSN
1550-235X
1098-0121
Date Issued
2014
Author(s)
Nandi, S.
Jin, W. T.
Su, Y.
Price, Stephen D.
Schmidt, W.
Schmalzl, K.
Chatterji, T.
Jeevan, Hirale S.
Gegenwart, Philipp
Brueckel, Th.
DOI
10.1103/PhysRevB.90.094407
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.