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Evolution of field-induced metastable phases in the Shastry-Sutherland lattice magnet TmB4
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Lançon, D., Scagnoli, V., Staub, U., Petrenko, Oleg, Ciomaga Hatnean, Monica, Canevet, E., Sibille, R., Francoual, S., Mardegan, J. R. L., Beauvois, K., Balakrishnan, Geetha, Heyderman, L. J., Rüegg, Ch. and Fennell, T. (2020) Evolution of field-induced metastable phases in the Shastry-Sutherland lattice magnet TmB4. Physical Review B, 102 (6). 060407. doi:10.1103/PhysRevB.102.060407 ISSN 2469-9950.
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Official URL: http://dx.doi.org/10.1103/PhysRevB.102.060407
Abstract
The appearance of a plateau in the magnetization of a quantum spin system subject to continuously varying magnetic field invites the identification of a topological quantization. Indeed, the magnetization plateaus at 1/8 and 1/2 of saturation in TmB4 have been suggested to be intrinsic, resulting from such a topological quantization, or, alternatively, to be metastable phases. By means of neutron- and x-ray-scattering experiments and magnetization measurements, we show that the 1/8 plateau is metastable, arising because the spin dynamics are frozen below T ≈ 4.5 K. Our experiments show that in this part of the phase diagram of TmB4, many long-ranged orders with different propagation vectors may appear and coexist, particularly as the applied field drives the system from one plateau to another. The magnetic structures accommodating a magnetization of ≈1/8 seem to be particularly favorable, but still only appear if the system has sufficient dynamics to reorganize into a superstructure as it is driven toward the expected plateau. This work demonstrates that TmB4 represents a model material for the study of slow dynamics, in and out of equilibrium.
Item Type: | Journal Article | ||||||||||||
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Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||
Library of Congress Subject Headings (LCSH): | Magnetization , Rotational motion, Spin waves, Lattice theory, Quantum theory, Nuclear spin | ||||||||||||
Journal or Publication Title: | Physical Review B | ||||||||||||
Publisher: | American Physical Society | ||||||||||||
ISSN: | 2469-9950 | ||||||||||||
Official Date: | 21 August 2020 | ||||||||||||
Dates: |
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Volume: | 102 | ||||||||||||
Number: | 6 | ||||||||||||
Article Number: | 060407 | ||||||||||||
DOI: | 10.1103/PhysRevB.102.060407 | ||||||||||||
Status: | Peer Reviewed | ||||||||||||
Publication Status: | Published | ||||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||||
Copyright Holders: | American Physical Society | ||||||||||||
Date of first compliant deposit: | 21 December 2020 | ||||||||||||
Date of first compliant Open Access: | 22 December 2020 | ||||||||||||
RIOXX Funder/Project Grant: |
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