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arxiv: 1409.0432 · v1 · submitted 2014-09-01 · ❄️ cond-mat.supr-con · cond-mat.str-el

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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
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H. S. Jeevan P. Gegenwart Th. Br\"uckel
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classification ❄️ cond-mat.supr-con cond-mat.str-el
keywords magneticmomentssamplesuperconductingas1-xpxbeloweufe2order
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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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