Abstract
The electronic structure and magnetic properties of SrMn0.5Fe0.5O3 powder and films grown on (1 0 0)-SrTiO3 (STO) and (1 0 0)-LaAlO3 (Lao) substrates by pulsed laser deposition (PLD) were investigated by temperature dependent magnetization and soft x-ray absorption. The results exhibit characteristics of 3d 5 Fe3+, and 3d3 + 3d 4 Mn4+ at room temperature in all samples. However, the features of 3d 5 Fe3+ and 3d 3 Mn4+ increased significantly for SMFO/Lao at 35 K, which also displayed substantial competition between antiferromagnetic and ferromagnetic order well-above the Néel temperature of SrFeO3 (T N ∼ 134 K). We attributed this to being caused by charge disproportionation resulting from ligand-hole localization, which is more favorable to take place when the sample is under compressive strain.
Original language | English |
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Article number | 345501 |
Journal | Journal of Physics Condensed Matter |
Volume | 28 |
Issue number | 34 |
DOIs | |
State | Published - 29 Jun 2016 |
Keywords
- charge disproportionation
- spin-glass
- strain effect
- strongly correlated system
- x-ray absorption spectroscopy