Structural and magnetic properties of topotactically reduced YSr2Mn2O7-x (0 < x < 1.5)
Reaction of the n = 2 Ruddlesden-Popper phase YSr2Mn 2O7 with NaH at 225 °C yields the topotactically reduced phase YS2Mn2O5.43(3) (a = 3.62043(4) Å, c = 22.3570(3) A). Combination of this reduced phase with the stoichiometric starting material at 400 °C yields intermediate phases: YSr2-Mn2O6.54(3)...
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| 格式: | Journal article |
| 語言: | English |
| 出版: |
2006
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| _version_ | 1826283808216842240 |
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| author | Hayward, M |
| author_facet | Hayward, M |
| author_sort | Hayward, M |
| collection | OXFORD |
| description | Reaction of the n = 2 Ruddlesden-Popper phase YSr2Mn 2O7 with NaH at 225 °C yields the topotactically reduced phase YS2Mn2O5.43(3) (a = 3.62043(4) Å, c = 22.3570(3) A). Combination of this reduced phase with the stoichiometric starting material at 400 °C yields intermediate phases: YSr2-Mn2O6.54(3) (a = 3.80900(7) Å, c = 20.2691(5) Å) and YSr2Mn2O5.96(3) (a = 3.81071(7) Å, c = 20.5238-(4) Å). The variation in the anion vacancy distribution of these reduced phases as a function of stoichiometry is discussed in relation to the coordination polyhedra of the metal cations. Temperature-dependent magnetization data indicate strong antiferromagnetic coupling interactions in all samples. Long-range magnetic order is suppressed by structural or charge disorder in all samples except YSr2Mn 2O5.5, which adopts a G-type antiferromagnetic ordering scheme with an ordered moment of 4.61(5)μB per manganese, consistent with S = 5/2 Mn(II). © 2006 American Chemical Society. |
| first_indexed | 2024-03-07T01:04:25Z |
| format | Journal article |
| id | oxford-uuid:8ad472db-75f8-4d04-9e4f-9eb8e566c6e1 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T01:04:25Z |
| publishDate | 2006 |
| record_format | dspace |
| spelling | oxford-uuid:8ad472db-75f8-4d04-9e4f-9eb8e566c6e12022-03-26T22:34:08ZStructural and magnetic properties of topotactically reduced YSr2Mn2O7-x (0 < x < 1.5)Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:8ad472db-75f8-4d04-9e4f-9eb8e566c6e1EnglishSymplectic Elements at Oxford2006Hayward, MReaction of the n = 2 Ruddlesden-Popper phase YSr2Mn 2O7 with NaH at 225 °C yields the topotactically reduced phase YS2Mn2O5.43(3) (a = 3.62043(4) Å, c = 22.3570(3) A). Combination of this reduced phase with the stoichiometric starting material at 400 °C yields intermediate phases: YSr2-Mn2O6.54(3) (a = 3.80900(7) Å, c = 20.2691(5) Å) and YSr2Mn2O5.96(3) (a = 3.81071(7) Å, c = 20.5238-(4) Å). The variation in the anion vacancy distribution of these reduced phases as a function of stoichiometry is discussed in relation to the coordination polyhedra of the metal cations. Temperature-dependent magnetization data indicate strong antiferromagnetic coupling interactions in all samples. Long-range magnetic order is suppressed by structural or charge disorder in all samples except YSr2Mn 2O5.5, which adopts a G-type antiferromagnetic ordering scheme with an ordered moment of 4.61(5)μB per manganese, consistent with S = 5/2 Mn(II). © 2006 American Chemical Society. |
| spellingShingle | Hayward, M Structural and magnetic properties of topotactically reduced YSr2Mn2O7-x (0 < x < 1.5) |
| title | Structural and magnetic properties of topotactically reduced YSr2Mn2O7-x (0 < x < 1.5) |
| title_full | Structural and magnetic properties of topotactically reduced YSr2Mn2O7-x (0 < x < 1.5) |
| title_fullStr | Structural and magnetic properties of topotactically reduced YSr2Mn2O7-x (0 < x < 1.5) |
| title_full_unstemmed | Structural and magnetic properties of topotactically reduced YSr2Mn2O7-x (0 < x < 1.5) |
| title_short | Structural and magnetic properties of topotactically reduced YSr2Mn2O7-x (0 < x < 1.5) |
| title_sort | structural and magnetic properties of topotactically reduced ysr2mn2o7 x 0 lt x lt 1 5 |
| work_keys_str_mv | AT haywardm structuralandmagneticpropertiesoftopotacticallyreducedysr2mn2o7x0ltxlt15 |