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HASANLI, Nijat, SCRIMSHIRE, Alex, BINGHAM, Paul, PALGRAVE, Robert and HAYWARD, Michael (2020). Structure and Magnetism of the Rh4+-containing perovskite oxides La0.5Sr0.5Mn0.5Rh0.5O3 and La0.5Sr0.5Fe0.5Rh0.5O3. Dalton Transactions: an international journal of inorganic chemistry, 49, 11346-11353.
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Abstract
Synchrotron X-ray powder diffraction data indicate that La0.5Sr0.5Mn0.5Rh0.5O3 and La0.5Sr0.5Fe0.5Rh0.5O3 adopt distorted perovskite structures (space group Pnma) with A-site and B-site cation disorder. A combination of XPS and 57Fe Mössbauer data indicate the transition metal cations in the two phases adopt Mn3+/Rh4+ and Fe3+/Rh4+ oxidation state combinations respectively. Transport data indicate both phases are insulating, with ρ vs. T dependences consistent with 3D variable-range hopping. Magnetisation data reveal that La0.5Sr0.5Mn0.5Rh0.5O3 adopts a ferromagnetic state below Tc ∼ 60 K, which is rationalized on the basis of coupling via a dynamic Jahn–Teller distortion mechanism. In contrast, magnetic data reveal La0.5Sr0.5Fe0.5Rh0.5O3 undergoes a transition to a spin-glass state at T ∼ 45 K, attributed to frustration between nearest-neighbour Fe–Rh and next-nearest-neighbour Fe–Fe couplings.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | 0302 Inorganic Chemistry; 0307 Theoretical and Computational Chemistry; 0399 Other Chemical Sciences; Inorganic & Nuclear Chemistry |
| Identification Number: | https://doi.org/10.1039/D0DT02466J |
| Page Range: | 11346-11353 |
| SWORD Depositor: | Symplectic Elements |
| Depositing User: | Symplectic Elements |
| Date Deposited: | 04 Aug 2020 09:16 |
| Last Modified: | 17 Mar 2021 23:32 |
| URI: | https://shura.shu.ac.uk/id/eprint/26857 |
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