Magnetic Structure in UIrAl

Prokeš, K.; Prchal, J.; Sechovský, V.; Андреев, А.В.

doi:10.12693/aphyspola.113.339

Acta Phys. Pol. A

2008

DOI: 10.12693/aphyspola.113.339

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Magnetic Structure in UIrAl

K. Prokeš

J. Prchal

V. Sechovský

et al.

Abstract: By means of neutron diffraction on a hexagonal UIrAl single crystal we find that this system orders ferromagnetically at low temperatures with magnetic moments of 0.93 (10) µ B aligned along the c axis. The Curie temperature TC = 65 (5) K determined from the diffraction experiment is in good agreement with bulk magnetic measurements.

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“…10 PND experiments on UGe 2 , 11 URhGe, 12 and URhSi ͑Ref. 13͒ ͑the latter compounds are isostructural to UCoGe͒, show that FM is due to itinerant uranium 5f electrons, and the magneticmoment values are in good agreement with those derived by electronic structure calculations.…”

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Anomalous spin distribution in the superconducting ferromagnet UCoGe studied by polarized neutron diffraction

et al. 2010

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Anomalous spin distribution in the superconducting ferromagnet UCoGe studied by polarized neutron diffraction Prokeš, K.; de Visser, A.; Huang, Y.; Fåk, B.; Ressouche, E. General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. We report a polarized neutron-diffraction study conducted to reveal the nature of the weak ferromagnetic moment in the superconducting ferromagnet UCoGe. We find that the ordered moment in the normal phase in low magnetic fields ͑B ʈ c͒ is predominantly located at the U atom and has a magnitude of ϳ0.1 B at 3 T, in agreement with bulk magnetization data. By increasing the magnetic field the U moment grows to ϳ0.3 B in 12 T and most remarkably, induces a substantial moment ͑ϳ0.2 B ͒ on the Co atom directed antiparallel to the U moment. The anomalous polarizability of the Co 3d orbitals is unique among uranium intermetallics and might reflect the proximity to a magnetic quantum critical point of UCoGe in zero field.

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confidence: 59%

Anomalous spin distribution in the superconducting ferromagnet UCoGe studied by polarized neutron diffraction

et al. 2010

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Magnetic Structure in UIrAl

Cited by 1 publication

References 9 publications

Anomalous spin distribution in the superconducting ferromagnet UCoGe studied by polarized neutron diffraction

Anomalous spin distribution in the superconducting ferromagnet UCoGe studied by polarized neutron diffraction

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