Magnetic structure determination of high-moment rare-earth-based laminates

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Magnetic structure determination of high-moment rare-earth-based laminates

D. Potashnikov, E. N. Caspi, A. Pesach, Q. Tao, J. Rosen, D. Sheptyakov, H. A. Evans, C. Ritter, Z. Salman, P. Bonfa, T. Ouisse, M. Barbier, O. Rivin, and A. Keren

Phys. Rev. B 104, 174440 – Published 29 November 2021

Abstract

We report muon spin rotation (μSR) and neutron diffraction on the rare-earth-based magnets ${({Mo}_{2 / 3} R E_{1 / 3})}_{2} AlC$ , also predicted as parent materials for two-dimensional (2D) derivatives, where the rare earth (RE) = Nd, Gd (only μSR), Tb, Dy, Ho, and Er. By crossing information between the two techniques, we determine the magnetic moment ( $m$ ), structure, and dynamic properties of all compounds. We find that only for RE = Nd and Gd the moments are frozen on a microsecond timescale. Out of these two, the most promising compound for a potential 2D high $m$ magnet is the Gd variant, since the parent crystals are pristine with $m = 6.5 \pm 0.5 μ_{B}$ , Néel temperature of $29 \pm 1 K$ , and the magnetic anisotropy between out-of- and in-plane coupling is smaller than $10^{- 8}$ . This result suggests that magnetic ordering in the Gd variant is dominated by in-plane magnetic interactions and should therefore remain stable when exfoliated into 2D sheets.

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Received 21 September 2021
Accepted 8 November 2021
Corrected 6 December 2021

DOI:https://doi.org/10.1103/PhysRevB.104.174440

Physics Subject Headings (PhySH)

Magnetism

Muon spin relaxation & rotation Neutron diffraction

Condensed Matter, Materials & Applied Physics

Corrections

6 December 2021

Correction: A second affiliation was added for the 12th author. The author list in Ref. [16] contained an error and has been set right.

Authors & Affiliations

D. Potashnikov ^1,2,*, E. N. Caspi³, A. Pesach³, Q. Tao⁴, J. Rosen⁴, D. Sheptyakov⁵, H. A. Evans⁶, C. Ritter ⁷, Z. Salman ⁸, P. Bonfa⁹, T. Ouisse¹⁰, M. Barbier^10,11, O. Rivin³, and A. Keren ¹

¹Faculty of Physics, Technion – Israeli Institute of Technology, Haifa 32000, Israel
²Israel Atomic Energy Commission, P.O. Box 7061, Tel-Aviv 61070, Israel
³Department of Physics, Nuclear Research Centre-Negev, P.O. Box 9001, Beer Sheva 84190, Israel
⁴Materials Design, Department of Physics, Chemistry, and Biology (IFM), Linköping University, SE-581 83 Linköping, Sweden
⁵Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
⁶Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
⁷Institut Laue-Langevin, 71 Avenue des Martyrs, 38042 Grenoble, France
⁸Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
⁹Department of Mathematical, Physical and Computer Sciences, University of Parma, 43124 Parma, Italy
¹⁰Université Grenoble Alpes, CNRS, Grenoble INP, LMGP, F-38000 Grenoble, France
¹¹ESRF, The European Synchrotron, 71 Avenue des Martyrs, CS 40220, 38043 Grenoble Cedex 9, France

^*sdannyp@campus.technion.ac.il

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Issue

Vol. 104, Iss. 17 — 1 November 2021

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