Neutron Investigation of the Magnetic Scattering in an Iron-based Ferromagnetic Superconductor

Published

August 31, 2015

Author(s)

Jeffrey W. Lynn, Xiuquan Zhou, Christopher K. H. Borg, Shanta R. Saha, Johnpierre Paglione, Efrain E. Rodriguez

Abstract

Neutron diffraction and small angle scattering experiments have been carried out on the double-isotopic polycrystalline sample (⁷Li_0.82Fe_0.18OD)FeSe. Profile refinements of the diffraction data of a=3.7827 A and c=9.1277 A at 4 K, in the ferromagnetic-superconductor regime, with a bulk superconducting transition of T_c = 18 K. Small angle neutron scattering (SANS) measurements in zero applied field reveal the onset of ferromagnetic order below T_F {approximately equal to}12.5 K, with a wave vector and temperature dependence consistent with an inhomogeneous ferromagnetic of vortices or domains in a mixed state. No oscillatory ordered magnetic state is observed. Field dependent occurs at the expected wave vector. The temperature dependence of the vortex scattering does not indicate any contribution from the ferromagnetism, consistent with diffraction data that indicate that the ordered moment is quite small.

Citation

Physical Review B

Volume

92

Issue

6

Pub Type

Journals

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Keywords

Iron-based superconductor, ferromagnet, vortex lattice, neutron scattering

Citation

Lynn, J. , Zhou, X. , H., C. , , S. , Paglione, J. and , E. (2015), Neutron Investigation of the Magnetic Scattering in an Iron-based Ferromagnetic Superconductor, Physical Review B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=918420 (Accessed April 20, 2024)