Restoration of the third law in spin ice thin films
A characteristic feature of spin ice is its apparent violation of the third law of thermodynamics. This leads to a number of interesting properties including the emergence of an effective vacuum for magnetic monopoles and their currents – magnetricity. Here we add a new dimension to the experimental...
| Main Authors: | , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Springer Nature
2014
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| _version_ | 1797050636206866432 |
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| author | Bovo, L Moya, X Prabhakaran, D Soh, Y Boothroyd, A Mathur, N Aeppli, G Bramwell, S |
| author_facet | Bovo, L Moya, X Prabhakaran, D Soh, Y Boothroyd, A Mathur, N Aeppli, G Bramwell, S |
| author_sort | Bovo, L |
| collection | OXFORD |
| description | A characteristic feature of spin ice is its apparent violation of the third law of thermodynamics. This leads to a number of interesting properties including the emergence of an effective vacuum for magnetic monopoles and their currents – magnetricity. Here we add a new dimension to the experimental study of spin ice by fabricating thin epitaxial films of Dy2Ti2O7, varying between 5 and 60 monolayers on an inert substrate. The films show the distinctive characteristics of spin ice at temperatures >2 K, but at lower temperature we find evidence of a zero entropy state. This restoration of the third law in spin ice thin films is consistent with a predicted strain-induced ordering of a very unusual type, previously discussed for analogous electrical systems. Our results show how the physics of frustrated pyrochlore magnets such as spin ice may be significantly modified in thin-film samples. |
| first_indexed | 2024-03-06T18:08:06Z |
| format | Journal article |
| id | oxford-uuid:021f3a0a-cfd6-4228-bcab-d59a85c36cf2 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T18:08:06Z |
| publishDate | 2014 |
| publisher | Springer Nature |
| record_format | dspace |
| spelling | oxford-uuid:021f3a0a-cfd6-4228-bcab-d59a85c36cf22022-03-26T08:38:48ZRestoration of the third law in spin ice thin filmsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:021f3a0a-cfd6-4228-bcab-d59a85c36cf2EnglishSymplectic Elements at OxfordSpringer Nature2014Bovo, LMoya, XPrabhakaran, DSoh, YBoothroyd, AMathur, NAeppli, GBramwell, SA characteristic feature of spin ice is its apparent violation of the third law of thermodynamics. This leads to a number of interesting properties including the emergence of an effective vacuum for magnetic monopoles and their currents – magnetricity. Here we add a new dimension to the experimental study of spin ice by fabricating thin epitaxial films of Dy2Ti2O7, varying between 5 and 60 monolayers on an inert substrate. The films show the distinctive characteristics of spin ice at temperatures >2 K, but at lower temperature we find evidence of a zero entropy state. This restoration of the third law in spin ice thin films is consistent with a predicted strain-induced ordering of a very unusual type, previously discussed for analogous electrical systems. Our results show how the physics of frustrated pyrochlore magnets such as spin ice may be significantly modified in thin-film samples. |
| spellingShingle | Bovo, L Moya, X Prabhakaran, D Soh, Y Boothroyd, A Mathur, N Aeppli, G Bramwell, S Restoration of the third law in spin ice thin films |
| title | Restoration of the third law in spin ice thin films |
| title_full | Restoration of the third law in spin ice thin films |
| title_fullStr | Restoration of the third law in spin ice thin films |
| title_full_unstemmed | Restoration of the third law in spin ice thin films |
| title_short | Restoration of the third law in spin ice thin films |
| title_sort | restoration of the third law in spin ice thin films |
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