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JCNS Workshop 2025, Trends and Perspectives in Neutron Scattering. Quantum Materials: Theory and Experiments

7.–9. Okt. 2025
Evangelische Akademie Tutzing
Europe/Berlin Zeitzone

Stefano Pasini

Magnetic neutron scattering of i-Tb-Cd quasicrystals

08.10.2025, 11:45
15m
Evangelische Akademie Tutzing

Evangelische Akademie Tutzing

Schloßstraße 2+4, 82327 Tutzing, Germany
Talk Frustrated spin systems Frustrated spin systems

Sprecher

Andreas KREYSSIG (Ruhr University Bochum, Experimental Physics IV, Bochum, Germany; Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, USA)

Beschreibung

i-Tb-Cd orders as icoshedral quasicrystal with the magnetic Tb$^{3+}$ ions arranged in Tsai-type clusters. We studied the magnetic correlations and excitations by elastic and inelastic neutron scattering on single-grain isotopically enriched samples. The measurements of the crystalline-electric field excitations demonstrated that the Tb$^{3+}$ moments are directed along the local fivefold axes of the Tsai-type clusters.[2] We calculated the magnetic diffuse scattering for the low-energy configurations using an Ising-type model for the moment arrangements on a single Tb$^{3+}$ icosahedron. By comparison with our diffuse neutron scattering signals, we identified the most likely moment configuration in a single cluster.[3] We further studied the role of intercluster interactions for magnetic frustration and the magnetic scattering.

Work at the Ames Laboratory was supported by the US Department of Energy (DOE), Basic Energy Sciences, Division of Materials, Sciences and Engineering, under Contract No. DEAC02-07CH11358. A portion of this research used resources at the High Flux Isotope Reactor and the Spallation Neutron Source, US DOE Office of Science User Facilities operated by the Oak Ridge National Laboratory.

[1] A. I. Goldman, T. Kong, A. Kreyssig, A. Jesche, M. Ramazanoglu, K. W. Dennis, S. L. Bud’ko, and P, C. Canfield, Nat. Mater. 12, 714 (2013).
[2] P. Das, P.-F. Lory, R. Flint, T. Kong, T. Hiroto, S. L. Bud’ko, P. C. Canfield, M. de Boissieu, A. Kreyssig, and A. I. Goldman, Phys. Rev. B 95, 054408 (2017).
[3] P. Das, A. Kreyssig, G. S. Tucker, A. Podlesnyak, F. Ye, M. Matsuda, T. Kong, S. L. Bud’ko, P. C. Canfield, R. Flint, P. P. Orth, T. Yamada, R. J. McQueeney, and A. I. Goldman, Phys. Rev. B 108, 134421 (2023).

Autoren

Andreas KREYSSIG (Ruhr University Bochum, Experimental Physics IV, Bochum, Germany; Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, USA) Pinaki DAS (Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, USA) Gregory S. TUCKER (Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, USA) Andrey PODLESNYAK (Oak Ridge National Laboratory, Neutron Scattering Division, USA) Feng YE (Oak Ridge National Laboratory, Neutron Scattering Division, USA) Masaaki MATSUDA (Oak Ridge National Laboratory, Neutron Scattering Division, USA) Tai KONG (Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, USA) Sergey L. BUD’KO (Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, USA) Paul C. CANFIELD (Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, USA) Rebecca FLINT (Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, USA) Peter P. ORTH (Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, USA; Saarland University, Department of Physics, Saarbrücken, Germany) Tsunetomo YAMADA (Tokyo University of Science, Department of Applied Physics, Tokyo, Japan) Alan I. GOLDMAN (Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, USA)

Präsentationsmaterialien

JCNSWorkshop2025-Abstract-Kreyssig_b.docx
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