Structure and magnetism of the Rh4+-containing perovskite oxides La0.5Sr0.5Mn0.5Rh0.5O3 and La0.5Sr0.5Fe0.5Rh0.5O3.
<p>Synchrotron X-ray powder diffraction data indicate that La<small><sub>0.5</sub></small>Sr<small><sub>0.5</sub></small>Mn<small><sub>0.5</sub></small>Rh<small><sub>0.5</sub></small>O<small>&...
| Main Authors: | , , , , |
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| 格式: | Journal article |
| 语言: | English |
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Royal Society of Chemistry
2020
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| _version_ | 1826263068338814976 |
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| author | Hasanli, N Scrimshire, A Bingham, PA Palgrave, RG Hayward, MA |
| author_facet | Hasanli, N Scrimshire, A Bingham, PA Palgrave, RG Hayward, MA |
| author_sort | Hasanli, N |
| collection | OXFORD |
| description | <p>Synchrotron X-ray powder diffraction data indicate that La<small><sub>0.5</sub></small>Sr<small><sub>0.5</sub></small>Mn<small><sub>0.5</sub></small>Rh<small><sub>0.5</sub></small>O<small><sub>3</sub></small> and La<small><sub>0.5</sub></small>Sr<small><sub>0.5</sub></small>Fe<small><sub>0.5</sub></small>Rh<small><sub>0.5</sub></small>O<small><sub>3</sub></small> adopt distorted perovskite structures (space group <em>Pnma</em>) with <em>A</em>-site and <em>B</em>-site cation disorder. A combination of XPS and <small><sup>57</sup></small>Fe Mössbauer data indicate the transition metal cations in the two phases adopt Mn<small><sup>3+</sup></small>/Rh<small><sup>4+</sup></small> and Fe<small><sup>3+</sup></small>/Rh<small><sup>4+</sup></small> oxidation state combinations respectively. Transport data indicate both phases are insulating, with <em>ρ vs</em>. <em>T</em> dependences consistent with 3D variable-range hopping. Magnetisation data reveal that La<small><sub>0.5</sub></small>Sr<small><sub>0.5</sub></small>Mn<small><sub>0.5</sub></small>Rh<small><sub>0.5</sub></small>O<small><sub>3</sub></small> adopts a ferromagnetic state below <em>T</em><small><sub>c</sub></small> ∼ 60 K, which is rationalized on the basis of coupling <em>via</em> a dynamic Jahn–Teller distortion mechanism. In contrast, magnetic data reveal La<small><sub>0.5</sub></small>Sr<small><sub>0.5</sub></small>Fe<small><sub>0.5</sub></small>Rh<small><sub>0.5</sub></small>O<small><sub>3</sub></small> undergoes a transition to a spin-glass state at <em>T</em> ∼ 45 K, attributed to frustration between nearest-neighbour Fe–Rh and next-nearest-neighbour Fe–Fe couplings.</p> |
| first_indexed | 2024-03-06T19:45:49Z |
| format | Journal article |
| id | oxford-uuid:22434a99-8edb-4f3e-aa4d-71b730f771cf |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T19:45:49Z |
| publishDate | 2020 |
| publisher | Royal Society of Chemistry |
| record_format | dspace |
| spelling | oxford-uuid:22434a99-8edb-4f3e-aa4d-71b730f771cf2022-03-26T11:37:52ZStructure and magnetism of the Rh4+-containing perovskite oxides La0.5Sr0.5Mn0.5Rh0.5O3 and La0.5Sr0.5Fe0.5Rh0.5O3.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:22434a99-8edb-4f3e-aa4d-71b730f771cfEnglishSymplectic ElementsRoyal Society of Chemistry2020Hasanli, NScrimshire, ABingham, PAPalgrave, RGHayward, MA<p>Synchrotron X-ray powder diffraction data indicate that La<small><sub>0.5</sub></small>Sr<small><sub>0.5</sub></small>Mn<small><sub>0.5</sub></small>Rh<small><sub>0.5</sub></small>O<small><sub>3</sub></small> and La<small><sub>0.5</sub></small>Sr<small><sub>0.5</sub></small>Fe<small><sub>0.5</sub></small>Rh<small><sub>0.5</sub></small>O<small><sub>3</sub></small> adopt distorted perovskite structures (space group <em>Pnma</em>) with <em>A</em>-site and <em>B</em>-site cation disorder. A combination of XPS and <small><sup>57</sup></small>Fe Mössbauer data indicate the transition metal cations in the two phases adopt Mn<small><sup>3+</sup></small>/Rh<small><sup>4+</sup></small> and Fe<small><sup>3+</sup></small>/Rh<small><sup>4+</sup></small> oxidation state combinations respectively. Transport data indicate both phases are insulating, with <em>ρ vs</em>. <em>T</em> dependences consistent with 3D variable-range hopping. Magnetisation data reveal that La<small><sub>0.5</sub></small>Sr<small><sub>0.5</sub></small>Mn<small><sub>0.5</sub></small>Rh<small><sub>0.5</sub></small>O<small><sub>3</sub></small> adopts a ferromagnetic state below <em>T</em><small><sub>c</sub></small> ∼ 60 K, which is rationalized on the basis of coupling <em>via</em> a dynamic Jahn–Teller distortion mechanism. In contrast, magnetic data reveal La<small><sub>0.5</sub></small>Sr<small><sub>0.5</sub></small>Fe<small><sub>0.5</sub></small>Rh<small><sub>0.5</sub></small>O<small><sub>3</sub></small> undergoes a transition to a spin-glass state at <em>T</em> ∼ 45 K, attributed to frustration between nearest-neighbour Fe–Rh and next-nearest-neighbour Fe–Fe couplings.</p> |
| spellingShingle | Hasanli, N Scrimshire, A Bingham, PA Palgrave, RG Hayward, MA Structure and magnetism of the Rh4+-containing perovskite oxides La0.5Sr0.5Mn0.5Rh0.5O3 and La0.5Sr0.5Fe0.5Rh0.5O3. |
| title | Structure and magnetism of the Rh4+-containing perovskite oxides La0.5Sr0.5Mn0.5Rh0.5O3 and La0.5Sr0.5Fe0.5Rh0.5O3. |
| title_full | Structure and magnetism of the Rh4+-containing perovskite oxides La0.5Sr0.5Mn0.5Rh0.5O3 and La0.5Sr0.5Fe0.5Rh0.5O3. |
| title_fullStr | Structure and magnetism of the Rh4+-containing perovskite oxides La0.5Sr0.5Mn0.5Rh0.5O3 and La0.5Sr0.5Fe0.5Rh0.5O3. |
| title_full_unstemmed | Structure and magnetism of the Rh4+-containing perovskite oxides La0.5Sr0.5Mn0.5Rh0.5O3 and La0.5Sr0.5Fe0.5Rh0.5O3. |
| title_short | Structure and magnetism of the Rh4+-containing perovskite oxides La0.5Sr0.5Mn0.5Rh0.5O3 and La0.5Sr0.5Fe0.5Rh0.5O3. |
| title_sort | structure and magnetism of the rh4 containing perovskite oxides la0 5sr0 5mn0 5rh0 5o3 and la0 5sr0 5fe0 5rh0 5o3 |
| work_keys_str_mv | AT hasanlin structureandmagnetismoftherh4containingperovskiteoxidesla05sr05mn05rh05o3andla05sr05fe05rh05o3 AT scrimshirea structureandmagnetismoftherh4containingperovskiteoxidesla05sr05mn05rh05o3andla05sr05fe05rh05o3 AT binghampa structureandmagnetismoftherh4containingperovskiteoxidesla05sr05mn05rh05o3andla05sr05fe05rh05o3 AT palgraverg structureandmagnetismoftherh4containingperovskiteoxidesla05sr05mn05rh05o3andla05sr05fe05rh05o3 AT haywardma structureandmagnetismoftherh4containingperovskiteoxidesla05sr05mn05rh05o3andla05sr05fe05rh05o3 |