Magnetically hidden order and spin dynamics in cerium-based f-electron systems.
Final Report Abstract
To summarize, in our project we have not only reached most of the original goals outlined in the funding proposal, but also came up with novel discoveries and ideas that could not be foreseen initially. Most importantly, we have experimentally established that the magnetic field direction is an important parameter in neutron scattering that can be employed to considerably influence the magnetic phase diagram and the excitation spectrum even in cubic systems, where no considerable magnetic anisotropy is usually expected. This principle is nicely demonstrated by both systems, CeLaB6 and Ce3 Pd20 Si6 . The results obtained in this project also served as a justification for another follow-up grant. There a dedicated sample rotator for INS measurements in a rotating magnetic field in being developed. The feasibility of such measurements has been demonstrated.
Publications
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Large positive correlation between the effective electron mass and the multipolar fluctuation in the heavy-fermion metal Ce1−x La x B6. npj Quant. Mater. 2, 62 (2017)
D. J. Jang, P Y. Portnichenko, A. S. Cameron, G. Friemel, A. V. Dukhnenko, N. Y. Shitsevalova, V B. Filipov, A. Schneidewind, A. Ivanov, D. S. Inosov, M. Brando
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Doping-induced redistribution of magnetic spectral weight in the substituted hexaborides Ce1−x La x B6 and Ce1−x Nd x B6 . Phys. Rev. B 97, 075116 (2018)
S. E. Nikitin, P Y. Portnichenko, A. V Dukhnenko, N. Yu. Shitsevalova, V. B. Filipov, Y. Qiu, J. A. Rodriguez-Rivera, J. Ollivier, D. S. Inosov
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Magnetic dynamics in heavy-fermion systems with multipolar ordering studied by neutron scattering. PhD Thesis, TU Dresden (2018)
P Y. Portnichenko
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Evolution of the propagation vector of hidden-order phases in Ce3 Pd20 Si6 with magnetic field. Phys. Rev. B 99, 214431 (2019)
P. Y. Portnichenko, S. E. Nikitin, A. Prokofiev, S. Paschen, J.-M. Mignot, J. Ollivier, A. Podlesnyak, S. Meng, Z. Lu, D. S. Inosov
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Field-angle resolved magnetic excitations as a probe of hidden-order symmetry in CeB6 . Phys. Rev. X 10, 021010 (2020)
P. Y. Portnichenko, A. Akbari, S. E. Nikitin, A. S. Cameron, A. V Dukhnenko, V B. Filipov, N. Yu. Shitsevalova, P Cermak, I. Radelytskyi, A. Schneidewind, J. Ollivier, A. Podlesnyak, Z. Huesges, J. Xu, A. Ivanov, Y. Sidis, S. Petit, J.-M. Mignot, P Thalmeier, D. S. Inosov
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Local origin of the strong field-space anisotropy in the magnetic phase diagrams of Ce1−x La x B6 measured in a rotating magnetic field. Phys. Rev. B 103, 214415 (2021)
D. S. Inosov, S. Avdoshenko, P Y. Portnichenko, E. S. Choi, A. Schneidewind, J.-M. Mignot, M. Nikolo
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Neutron-scattering studies of spin dynamics in pure and doped CeB6. Chapter 9 in “Rare-Earth Borides” by Dmytro S. Inosov (ed.), Jenny Stanford Publishing Pte. Ltd. (2021), ISBN 978-9-814-87756-5
P Y. Portnichenko, A. S. Cameron, D. S. Inosov
