Local electronic structure and magnetic properties of LaMn 0.5 Co 0.5 O 3 studied by x-ray absorption and magnetic circular dichroism spectroscopy
We have studied the local electronic structure of LaMn0.5Co0.5O3 using soft-x-ray absorption spectroscopy at the Co−L3,2 and Mn−L3,2 edges. We found a high-spin Co2+−Mn4+ valence state for samples with the optimal Curie temperature. We discovered that samples with lower Curie temperatures contain lo...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article (Journal) |
| Language: | English |
| Published: |
17 March 2008
|
| In: |
Physical review. B, Condensed matter and materials physics
Year: 2008, Volume: 77, Issue: 12, Pages: 125124 |
| ISSN: | 1550-235X |
| DOI: | 10.1103/PhysRevB.77.125124 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevB.77.125124 Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevB.77.125124 
|
| Author Notes: | T. Burnus, Z. Hu, H.H. Hsieh, V.L.J. Joly, P.A. Joy, M.W. Haverkort, Hua Wu, A. Tanaka, H.-J. Lin, C.T. Chen, and L.H. Tjeng |
| Summary: | We have studied the local electronic structure of LaMn0.5Co0.5O3 using soft-x-ray absorption spectroscopy at the Co−L3,2 and Mn−L3,2 edges. We found a high-spin Co2+−Mn4+ valence state for samples with the optimal Curie temperature. We discovered that samples with lower Curie temperatures contain low-spin nonmagnetic Co3+ ions. Using soft-x-ray magnetic circular dichroism, we established that the Co2+ and Mn4+ ions are ferromagnetically aligned. We also revealed that the Co2+ ions have a large orbital moment: morb/mspin≈0.47. Together with model calculations, this suggests the presence of a large magnetocrystalline anisotropy in the material and predicts a nontrivial temperature dependence for the magnetic susceptibility. |
|---|---|
| Item Description: | Die Gruppen "0.5" und die Ziffer "3" im Titel sind tiefgestellt Gesehen am 07.11.2017 |
| Physical Description: | Online Resource |
| ISSN: | 1550-235X |
| DOI: | 10.1103/PhysRevB.77.125124 |