Comparative study of heterogeneous magnetic state above TC in La0.82Sr0.18CoO3 cobaltite and La0.83Sr0.17MnO3 manganite
| Autor: | A. V. Lazuta, P.L. Molkanov, V. A. Ryzhov, V. P. Khavronin, Ya. M. Mukovskii, A. Pestun, V. V. Runov, A.I. Kurbakov, R.V. Privezentsev |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Phase transition
Materials science Spin states Condensed matter physics Condensed Matter Physics Manganite Electronic Optical and Magnetic Materials Cobaltite Condensed Matter::Materials Science Paramagnetism chemistry.chemical_compound Transition metal chemistry Ferromagnetism Condensed Matter::Strongly Correlated Electrons Ground state |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 324:3432-3436 |
| ISSN: | 0304-8853 |
| Popis: | The magnetic, transport and structural properties are studied for La 0.83 Sr 0.17 MnO 3 and La 0.82 Sr 0.18 CoO 3 single crystals with nearly the same doping and the metallic ground state. Their comparisons have shown that ferromagnetic clusters originate in the paramagnetic matrix below Т ⁎ >T C in both samples and exhibit similar properties. This suggests the possible universality of such phenomena in doped mixed-valence oxides of transition metals with the perovskite-type structure. The cluster density increases on cooling and plays an important role on the physical properties of these systems. The differences in cluster evolutions and scenarios of their insulator–metal transitions are related to different magnetic behaviors of the matrixes in these crystals that is mainly due to distinct spin states of the Mn 3+ and Co 3+ ions. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect