Valence and spin states, and the metal-insulator transition in ferromagnetic La2-xSrxMnNiO6 (x=0,0.2)
SCIE
SCOPUS
- Title
- Valence and spin states, and the metal-insulator transition in ferromagnetic La2-xSrxMnNiO6 (x=0,0.2)
- Authors
- Kang, JS; Lee, HJ; Kim, DH; Kolesnik, S; Dabrowski, B; Swierczek, K; Lee, J; Kim, B; Min, BI
- Date Issued
- 2009-07
- Publisher
- AMER PHYSICAL SOC
- Abstract
- Electronic structures of a ferromagnetic insulator La2MnNiO6 and Sr-doped La1.8Sr0.2MnNiO6 have been investigated by employing soft x-ray synchrotron-radiation spectroscopies, first-principles band-structure calculations, and ligand-field multiplet calculations. Our study provides evidence that La2MnNiO6 has the [high-spin (HS) Mn4+-(3)A(2) Ni2+] configuration while La1.8Sr0.2MnNiO6 has [HS Mn4+-(3)A(2) Ni2+ low-spin Ni3+]. It is directly observed that the spin moments of Mn and Ni ions are coupled ferromagnetically. The metallic spectral weight is observed for x=0.2 in O 1s x-ray absorption spectroscopy, which is consistent with the half-metallic ground state predicted by band-structure calculations.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/12205
- DOI
- 10.1103/PHYSREVB.80.045115
- ISSN
- 1098-0121
- Article Type
- Article
- Citation
- PHYSICAL REVIEW B, vol. 80, no. 4, 2009-07
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