| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1800305 | Journal of Magnetism and Magnetic Materials | 2013 | 6 Pages |
Using dc magnetic susceptibility, electron spin resonance (ESR) and dielectric spectroscopy techniques, we investigate the magnetic and dielectric properties of Sr7Mn4O15, which has a layered structure with pairs of face-sharing octahedra Mn2O9. Magnetic susceptibility reveals the Néel temperature TN∼70.5 K, above which Sr7Mn4O15 manifests intense short range order. ESR spectra indicate the existence of a transition at about 370 K, confirming the suggested spin pairing in the Mn2O9 units. In the dielectric spectra, a sudden drop of permittivity is observed at TN, revealing the existence of strong spin–lattice coupling in Sr7Mn4O15.
► Sr7Mn4O15 was synthesized through organic polymeric gel route. ► Direct evidence for the Mn spin pairing in Mn2O9 units was obtained from ESR analysis. ► Dielectric spectra revealed Sr7Mn4O15 to be a system with strong spin–lattice coupling.
