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Magnetisation process in the rare earth tetraborides, NdB4 and HoB4
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Brunt, Daniel C., Balakrishnan, Geetha, Mayoh, Daniel, Lees, Martin R., Gorbunov, D., Qureshi, N. and Petrenko, Oleg (2018) Magnetisation process in the rare earth tetraborides, NdB4 and HoB4. Scientific Reports, 8 (1). 232. doi:10.1038/s41598-017-18301-1
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Official URL: http://dx.doi.org/10.1038/s41598-017-18301-1
Abstract
A field-induced magnetisation process in the frustrated antiferromagnets is often much richer compared to the materials without competing interactions. The applied field tends to stabilise unusual spin configurations which frequently results in the appearance of magnetisation plateaux. Here we report a study into the field-induced magnetisation of the two frustrated rare earth tetraborides, HoB4 and NdB4. NdB4 shows a fractional magnetisation plateau occurring at M/Msat ≈ 1/5 before saturating in a field of 33 kOe. On cooling down to 0.5 K the temperature dependent susceptibility of NdB4 shows an unconventional transition where the system returns to the zero field antiferromagnetic state from a higher-temperature ferrimagnetic state. We are able to reconstruct the magnetic phase diagram of NdB4 from the magnetisation, susceptibility and resistivity measurements for both H ∥ c and H ⊥ c. For HoB4, the most interesting behaviour is found at the lowest temperature of 0.5 K, where the field dependent magnetisation demonstrates a new fractional 1/2-magnetisation plateau. Further insight into the relations between the exchange interactions and single ion effects is gained through high-field magnetisation measurements in both HoB4 and NdB4.
| Item Type: | Journal Article | ||||||||
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| Subjects: | Q Science > QC Physics | ||||||||
| Divisions: | Faculty of Science > Physics | ||||||||
| Library of Congress Subject Headings (LCSH): | Rare earth borides -- Magnetic properties, Magnetization, Lattice dynamics, Antiferromagnetism | ||||||||
| Journal or Publication Title: | Scientific Reports | ||||||||
| Publisher: | Macmillan Publishers Limited - Springer Nature | ||||||||
| ISSN: | 2045-2322 | ||||||||
| Official Date: | 10 January 2018 | ||||||||
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| Volume: | 8 | ||||||||
| Number: | 1 | ||||||||
| Article Number: | 232 | ||||||||
| DOI: | 10.1038/s41598-017-18301-1 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Open Access | ||||||||
| Copyright Holders: | Macmillan Publishers Limited - Springer Nature | ||||||||
| RIOXX Funder/Project Grant: |
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