Hidden order signatures in the antiferromagnetic phase of U(Ru1-xFex)2Si2

Williams, Travis J.; Aczel, Adam A.; Stone, Matthew B.; Wilson, Murray N.; Luke, Graeme M.

doi:10.1103/PhysRevB.95.104440

Title: Hidden order signatures in the antiferromagnetic phase of $U {({Ru}_{1 - x} {Fe}_{x})}_{2} {Si}_{2}$

Journal Article · Fri Mar 31 00:00:00 EDT 2017 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.95.104440· OSTI ID:1351756

Williams, Travis J. ^[1]; Aczel, Adam A. ^[1]; Stone, Matthew B. ^[1]; Wilson, Murray N. ^[2]; Luke, Graeme M. ^[3]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
McMaster Univ., Hamilton, ON (Canada)
McMaster Univ., Hamilton, ON (Canada); Canadian Institute for Advanced Research, Toronto, ON (Canada)

We present a comprehensive set of elastic and inelastic neutron scattering measurements on a range of Fe-doped samples of U(Ru_1–xFe_x)₂Si₂ with 0.01 ≤ x ≤ 0.15. All of the samples measured exhibit long-range antiferromagnetic order, with the size of the magnetic moment quickly increasing to 0.51μB at 2.5% doping and continuing to increase monotonically with doping, reaching 0.69μB at 15% doping. Time-of-flight and inelastic triple-axis measurements show the existence of excitations at (1 0 0) and (1.4 0 0) in all samples, which are also observed in the parent compound. While the excitations in the 1% doping are quantitatively identical to the parent material, the gap and width of the excitations change rapidly at 2.5% Fe doping and above. The 1% doped sample shows evidence for a separation in temperature between the hidden order and antiferromagnetic transitions, suggesting that the antiferromagnetic state emerges at very low Fe dopings. Finally, the combined neutron scattering data suggest not only discontinuous changes in the magnetic moment and excitations between the hidden order and antiferromagnetic phases, but that these changes continue to evolve up to at least x = 0.15.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)

Sponsoring Organization:: USDOE Laboratory Directed Research and Development (LDRD) Program

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1351756

Alternate ID(s):: OSTI ID: 1349538

Journal Information:: Physical Review B, Vol. 95, Issue 10; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 7 works

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References (35)

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Title: Hidden order signatures in the antiferromagnetic phase of $U {({Ru}_{1 - x} {Fe}_{x})}_{2} {Si}_{2}$