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

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.

View Accepted Manuscript (DOE)

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

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

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1351756

Alternate ID(s):: OSTI ID: 1349538

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

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Hidden order and beyond: an experimental—theoretical overview of the multifaceted behavior of URu ₂ Si ₂ Mydosh, J. A.; Oppeneer, P. M.; Riseborough, P. S. Journal of Physics: Condensed Matter, Vol. 32, Issue 14 https://doi.org/10.1088/1361-648x/ab5eba	journal	January 2020

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