Anisotropic magnetic structures of the MnRMnSbO6 high pressure double double perovskites
A new type of doubly ordered perovskite (also reported as double double perovskite, DDPv) structure combining columnar and rock-salt orders of the cations at the A and B sites, respectively, was recently found at high pressure for MnRMnSbO6 (R = La–Sm). Here we report further magnetic structures of...
| Autores: | , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2018 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/92960 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/92960 |
| Access Level: | acceso abierto |
| Palabra clave: | 546 High pressure Neutron diffraction Magnetic properties Spin reorientation Double double perovskite Química inorgánica (Química) Materiales 2303.29 Elementos de Transición 2303.24 Tierras Raras 2211.17 Propiedades Magnéticas |
| Sumario: | A new type of doubly ordered perovskite (also reported as double double perovskite, DDPv) structure combining columnar and rock-salt orders of the cations at the A and B sites, respectively, was recently found at high pressure for MnRMnSbO6 (R = La–Sm). Here we report further magnetic structures of these compounds. Mn2+ spins align into antiparallel ferromagnetic sublattices along the x axis for MnLaMnSbO6, while the magnetic anisotropy of Pr3+ magnetic moments induces their preferential order along the z direction for MnPrMnSbO6. The magnetic structure of MnNdMnSbO6 was reported to show a spin-reorientation transition of Mn2+ spins from the z axis towards the x axis driven by the ordering of Nd3+ magnetic moments. The crystal-field parameters for Pr3+ and Nd3+ at the 4e C2 site of their DDPv structure have been semiempirically estimated and used to derive their energy levels and associated wave functions. The results demonstrate that the spin-reorientation transition in MnNdMnSbO6 arises as a consequence of the crystal-field-induced magnetic anisotropy of Nd3+. |
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