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Field-induced canting of magnetic moments in GdCo5 at finite temperature : first-principles calculations and high-field measurements
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Patrick, Christopher E., Kumar, Santosh, Gotze, Kathrin, Pearce, Matthew J., Singleton, John, Rowlands, G. (George), Balakrishnan, Geetha, Lees, Martin R., Goddard, Paul and Staunton, Julie B. (2018) Field-induced canting of magnetic moments in GdCo5 at finite temperature : first-principles calculations and high-field measurements. Journal of Physics: Condensed Matter, 30 (32). 32LT01. doi:10.1088/1361-648X/aad029
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WRAP-field-induced-canting-magnetic-moments-GdCo5-finite-temperature-Patrick-2018.pdf - Accepted Version - Requires a PDF viewer. Download (698Kb) | Preview |
Official URL: https://doi.org/10.1088/1361-648X/aad029
Abstract
We present calculations and experimental measurements of the temperature-dependent magnetization of a single crystal of GdCo5 in magnetic fields of order 60 T. At zero temperature the calculations, based on density-functional theory in the disordered-local-moment picture, predict a field-induced transition from an antiferromagnetic to a canted alignment of Gd and Co moments at 46.1 T. At higher temperatures the calculations find this critical field to increase along with the zerofield magnetization. The experimental measurements observe this transition to occur between 44–48 T at 1.4 K. Up to temperatures of at least 100 K, the experiments continue to observe the transition; however, at variance with the calculations, no strong temperature dependence of the critical field is apparent. We assign this difference to the inaccurate description of the zero-field magnetization of the calculations at low temperatures, due to the use of classical statistical mechanics. Correcting for this effect, we recover a consistent description of the high-field magnetization of GdCo5 from theory and experiment.
| 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 metals -- Magnetic properties, Transition metals -- Magnetic properties, Magnetization | ||||||||||||
| Journal or Publication Title: | Journal of Physics: Condensed Matter | ||||||||||||
| Publisher: | Institute of Physics Publishing Ltd. | ||||||||||||
| ISSN: | 0953-8984 | ||||||||||||
| Official Date: | 16 July 2018 | ||||||||||||
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| Volume: | 30 | ||||||||||||
| Number: | 32 | ||||||||||||
| Article Number: | 32LT01 | ||||||||||||
| DOI: | 10.1088/1361-648X/aad029 | ||||||||||||
| Status: | Peer Reviewed | ||||||||||||
| Publication Status: | Published | ||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||||||
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