Melting of magnetic correlations in charge-orbital orderedLa1/2Sr3/2MnO4: Competition of ferromagnetic and antiferromagnetic states
| Autor: | Thomas Lorenz, M. Benomar, O. Schumann, K. Habicht, Markus Braden, Markus Kriener, Yvan Sidis, D. Senff, P. Link |
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| Rok vydání: | 2008 |
| Předmět: |
Materials science
Condensed matter physics Magnetic structure Magnon Order (ring theory) Condensed Matter Physics Manganite Inelastic neutron scattering Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Ferromagnetism Spin wave Antiferromagnetism Condensed Matter::Strongly Correlated Electrons |
| Zdroj: | Physical Review B. 77 |
| ISSN: | 1550-235X 1098-0121 |
| DOI: | 10.1103/physrevb.77.184413 |
| Popis: | The magnetic correlations in the charge and orbital ordered manganite ${\text{La}}_{1/2}{\text{Sr}}_{3/2}{\text{MnO}}_{4}$ have been studied by elastic and inelastic neutron scattering techniques. Out of the well-defined charge exchange (CE)-type magnetic structure with the corresponding magnons, a competition between CE-type and ferromagnetic fluctuations develops. Whereas ferromagnetic correlations are fully suppressed by the static CE-type order at low temperature, elastic and inelastic CE-type correlations disappear with the melting of the charge-orbital order at high temperature. In its charge-orbital disordered phase, ${\text{La}}_{1/2}{\text{Sr}}_{3/2}{\text{MnO}}_{4}$ exhibits a dispersion of ferromagnetic correlations, which remarkably resembles the magnon dispersion in ferromagnetically ordered metallic perovskite manganites. |
| Databáze: | OpenAIRE |
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