Two-dimensional magnetism in the pnictide superconductor parent material SrFeAsF probed by muon-spin relaxation
We report muon-spin relaxation measurements on SrFeAsF, which is the parent compound of an iron-arsenic- fluoride based series of superconducting materials. We find that this material has very similar magnetic properties to LaFeAsO, such as separated magnetic and structural transitions (TN =122 K, T...
| Autores principales: | , , , , , |
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| Formato: | Journal article |
| Lenguaje: | English |
| Publicado: |
2009
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| _version_ | 1826303000458559488 |
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| author | Baker, P Franke, I Lancaster, T Blundell, S Kerslake, L Clarke, S |
| author_facet | Baker, P Franke, I Lancaster, T Blundell, S Kerslake, L Clarke, S |
| author_sort | Baker, P |
| collection | OXFORD |
| description | We report muon-spin relaxation measurements on SrFeAsF, which is the parent compound of an iron-arsenic- fluoride based series of superconducting materials. We find that this material has very similar magnetic properties to LaFeAsO, such as separated magnetic and structural transitions (TN =122 K, Ts =175 K), contrasting with SrFe2 As2 where they are coincident. The muon oscillation frequencies fall away very sharply at TN [β=0.22 (3)], which suggests that the magnetic exchange between the layers is weaker than in comparable oxypnictide compounds. Our specific-heat measurements show that a small but distinct feature occurs at Ts. There is no anomaly evident at TN as is typical for quasi-two-dimensional magnets. The magnetic entropy change between 100 and 185 K is ΔS=0.5 J mol-1 K-1. © 2009 The American Physical Society. |
| first_indexed | 2024-03-07T05:55:58Z |
| format | Journal article |
| id | oxford-uuid:ea82d67c-ed57-486a-bea5-7ce17a5c6b3c |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T05:55:58Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | oxford-uuid:ea82d67c-ed57-486a-bea5-7ce17a5c6b3c2022-03-27T11:02:49ZTwo-dimensional magnetism in the pnictide superconductor parent material SrFeAsF probed by muon-spin relaxationJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:ea82d67c-ed57-486a-bea5-7ce17a5c6b3cEnglishSymplectic Elements at Oxford2009Baker, PFranke, ILancaster, TBlundell, SKerslake, LClarke, SWe report muon-spin relaxation measurements on SrFeAsF, which is the parent compound of an iron-arsenic- fluoride based series of superconducting materials. We find that this material has very similar magnetic properties to LaFeAsO, such as separated magnetic and structural transitions (TN =122 K, Ts =175 K), contrasting with SrFe2 As2 where they are coincident. The muon oscillation frequencies fall away very sharply at TN [β=0.22 (3)], which suggests that the magnetic exchange between the layers is weaker than in comparable oxypnictide compounds. Our specific-heat measurements show that a small but distinct feature occurs at Ts. There is no anomaly evident at TN as is typical for quasi-two-dimensional magnets. The magnetic entropy change between 100 and 185 K is ΔS=0.5 J mol-1 K-1. © 2009 The American Physical Society. |
| spellingShingle | Baker, P Franke, I Lancaster, T Blundell, S Kerslake, L Clarke, S Two-dimensional magnetism in the pnictide superconductor parent material SrFeAsF probed by muon-spin relaxation |
| title | Two-dimensional magnetism in the pnictide superconductor parent material SrFeAsF probed by muon-spin relaxation |
| title_full | Two-dimensional magnetism in the pnictide superconductor parent material SrFeAsF probed by muon-spin relaxation |
| title_fullStr | Two-dimensional magnetism in the pnictide superconductor parent material SrFeAsF probed by muon-spin relaxation |
| title_full_unstemmed | Two-dimensional magnetism in the pnictide superconductor parent material SrFeAsF probed by muon-spin relaxation |
| title_short | Two-dimensional magnetism in the pnictide superconductor parent material SrFeAsF probed by muon-spin relaxation |
| title_sort | two dimensional magnetism in the pnictide superconductor parent material srfeasf probed by muon spin relaxation |
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