Journal Article

PUBDB-2020-03066

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Evolution of field-induced metastable phases in the Shastry-Sutherland lattice magnet TmB 4

Lancon, D. (Corresponding author)Extern* ; Scagnoli, V. ; Staub, U. ; Petrenko, O. A. ; Ciomaga Hatnean, M. ; Canevet, E. ; Sibille, R. ; Francoual, S.DESY* ; Mardegan, J. R. L. ; Beauvois, K. ; Balakrishnan, G. ; Heyderman, L. J. ; Rüegg, C. ; fennell, t.

2020
Inst. Woodbury, NY

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Please use a persistent id in citations: doi:10.1103/PhysRevB.102.060407  doi:10.3204/PUBDB-2020-03066

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.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)
2. Experimentebetreuung PETRA III (FS-PET-S)

Research Program(s):

1. 6212 - Quantum Condensed Matter: Magnetism, Superconductivity (POF3-621) (POF3-621)
2. 6G3 - PETRA III (POF3-622) (POF3-622)

Experiment(s):

1. PETRA Beamline P09 (PETRA III)

Appears in the scientific report 2020

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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