Field-induced canting of magnetic moments in GdCo5 at finite temperature: first-principles calculations and high-field measurements
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 tra...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
IOP Science
2018
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| _version_ | 1826260318782750720 |
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| author | Patrick, CE Kumar, S Götze, K Pearce, MJ Singleton, J Rowlands, G Balakrishnan, G Lees, MR Goddard, PA Staunton, JB |
| author_facet | Patrick, CE Kumar, S Götze, K Pearce, MJ Singleton, J Rowlands, G Balakrishnan, G Lees, MR Goddard, PA Staunton, JB |
| author_sort | Patrick, CE |
| collection | OXFORD |
| description | 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 zero-field 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. |
| first_indexed | 2024-03-06T19:03:44Z |
| format | Journal article |
| id | oxford-uuid:146b351b-250d-4228-a0ec-5b8c845b62de |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T19:03:44Z |
| publishDate | 2018 |
| publisher | IOP Science |
| record_format | dspace |
| spelling | oxford-uuid:146b351b-250d-4228-a0ec-5b8c845b62de2022-03-26T10:19:42ZField-induced canting of magnetic moments in GdCo5 at finite temperature: first-principles calculations and high-field measurementsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:146b351b-250d-4228-a0ec-5b8c845b62deEnglishSymplectic Elements at OxfordIOP Science2018Patrick, CEKumar, SGötze, KPearce, MJSingleton, JRowlands, GBalakrishnan, GLees, MRGoddard, PAStaunton, JBWe 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 zero-field 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. |
| spellingShingle | Patrick, CE Kumar, S Götze, K Pearce, MJ Singleton, J Rowlands, G Balakrishnan, G Lees, MR Goddard, PA Staunton, JB Field-induced canting of magnetic moments in GdCo5 at finite temperature: first-principles calculations and high-field measurements |
| title | Field-induced canting of magnetic moments in GdCo5 at finite temperature: first-principles calculations and high-field measurements |
| title_full | Field-induced canting of magnetic moments in GdCo5 at finite temperature: first-principles calculations and high-field measurements |
| title_fullStr | Field-induced canting of magnetic moments in GdCo5 at finite temperature: first-principles calculations and high-field measurements |
| title_full_unstemmed | Field-induced canting of magnetic moments in GdCo5 at finite temperature: first-principles calculations and high-field measurements |
| title_short | Field-induced canting of magnetic moments in GdCo5 at finite temperature: first-principles calculations and high-field measurements |
| title_sort | field induced canting of magnetic moments in gdco5 at finite temperature first principles calculations and high field measurements |
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