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Field-induced magnetic states in geometrically frustrated SrEr2O4
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Qureshi, Navid, Fabelo, Oscar, Manuel, P., Khalyavin, Dmitry, Lhotel, E., Riberolles, S. X. M., Balakrishnan, Geetha and Petrenko, Oleg (2021) Field-induced magnetic states in geometrically frustrated SrEr2O4. SciPost Physics, 11 (1). 007. doi:10.21468/SciPostPhys.11.1.007
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Official URL: http://dx.doi.org/10.21468/SciPostPhys.11.1.007
Abstract
We report an unusual in-field behaviour of SrEr2O4 for a magnetic field applied along two high-symmetry directions, the a and c axes. This geometrically frustrated magnet hosts two crystallographically inequivalent Er ions, Er1 and Er2, that are both located on triangular zigzag ladders, but only one site, Er1, forms a long-range magnetic order at low temperatures in a zero field. We follow the sequence of peculiar field induced states in SrEr2O4 with detailed single-crystal magnetisation and neutron diffraction experiments. On application of an external field along the c axis, the long-range antiferromagnetic order of the Er1 ions is rapidly destroyed and replaced, in fields between 2 and 5 kOe, by a state with shorter-range correlations. The change in correlation length coincides with a fast increase in magnetisation during the metamagnetic transition above which a long-range order is reestablished and maintained into the high fields. The high-field ferromagnet-like order is characterised by significantly different magnetic moments on the two Er sites, with the Er1 site dominating the magnetisation process. For the field applied parallel to the a axis, in the field range of 4 to 12 kOe, the planes of diffuse magnetic scattering observed in zero field due to the one-dimensional correlations between the Er2 moments are replaced by much more localised but still diffuse features corresponding to the establishment of an up-up-down structure associated with a one-third magnetisation plateau. Above 14 kOe, a ferromagnet-like high-field order is induced following another phase transition. For this direction of the field, the Er2 moments dictate the succession of transitions while the Er1 moments remain significantly less polarised. A complete field polarisation of both Er sites is not achieved even at 50 kOe for either field direction, reflecting the strongly anisotropic nature of magnetisation process in SrEr2O4.
| Item Type: | Journal Article | ||||||||||||
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| Subjects: | Q Science > QC Physics | ||||||||||||
| Divisions: | Faculty of Science > Physics | ||||||||||||
| Library of Congress Subject Headings (LCSH): | Condensed matter -- Magnetic properties, Magnetism, Magnetic fields | ||||||||||||
| Journal or Publication Title: | SciPost Physics | ||||||||||||
| Publisher: | SciPost Foundation | ||||||||||||
| ISSN: | 2542-4653 | ||||||||||||
| Official Date: | 12 July 2021 | ||||||||||||
| Dates: |
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| Volume: | 11 | ||||||||||||
| Number: | 1 | ||||||||||||
| Article Number: | 007 | ||||||||||||
| DOI: | 10.21468/SciPostPhys.11.1.007 | ||||||||||||
| Status: | Peer Reviewed | ||||||||||||
| Publication Status: | Published | ||||||||||||
| Access rights to Published version: | Open Access | ||||||||||||
| Copyright Holders: | The Authors | ||||||||||||
| RIOXX Funder/Project Grant: |
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