Ambiguity in B-Site cation ordering: A Case study of the double perovskite Ca$_2$CoNbO$_6$
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2026
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866913155729326080 |
|---|---|
| author | Artiukova, Svetlana A. Yatsyk, Ivan V. Batulin, Ruslan G. Deeva, Yulia A. Chupakhina, Tatiana I. Bazhal, Vladislav V. Balitskiy, Alexandr I. Eremina, Rushana M. Fazlizhanova, Dina I. |
| author_facet | Artiukova, Svetlana A. Yatsyk, Ivan V. Batulin, Ruslan G. Deeva, Yulia A. Chupakhina, Tatiana I. Bazhal, Vladislav V. Balitskiy, Alexandr I. Eremina, Rushana M. Fazlizhanova, Dina I. |
| contents | The ordering of cations in the B sublattice remains a challenging issue in double perovskites. In this work, a combined experimental and theoretical approach was employed to investigate the Co/Nb distribution in Ca$_2$CoNbO$_6$ and its influence on magnetic and transport properties. The density functional theory, supported by magnetic susceptibility measurements, indicates that Co adopts a high-spin Co$^{3+}$ state. No long-range magnetic ordering was observed down to low temperatures; however, the presence of short-range correlations points to the partial disorder in the Co/Nb sublattice. This interpretation is further supported by electron paramagnetic resonance, which also reveals slight oxygen nonstoichiometry. Electrical transport follows a small-polaron hopping mechanism with an activation energy of 0.25 eV. The Seebeck coefficient reaches 0.4 mV/K at 600 K. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_23558 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Ambiguity in B-Site cation ordering: A Case study of the double perovskite Ca$_2$CoNbO$_6$ Artiukova, Svetlana A. Yatsyk, Ivan V. Batulin, Ruslan G. Deeva, Yulia A. Chupakhina, Tatiana I. Bazhal, Vladislav V. Balitskiy, Alexandr I. Eremina, Rushana M. Fazlizhanova, Dina I. Materials Science The ordering of cations in the B sublattice remains a challenging issue in double perovskites. In this work, a combined experimental and theoretical approach was employed to investigate the Co/Nb distribution in Ca$_2$CoNbO$_6$ and its influence on magnetic and transport properties. The density functional theory, supported by magnetic susceptibility measurements, indicates that Co adopts a high-spin Co$^{3+}$ state. No long-range magnetic ordering was observed down to low temperatures; however, the presence of short-range correlations points to the partial disorder in the Co/Nb sublattice. This interpretation is further supported by electron paramagnetic resonance, which also reveals slight oxygen nonstoichiometry. Electrical transport follows a small-polaron hopping mechanism with an activation energy of 0.25 eV. The Seebeck coefficient reaches 0.4 mV/K at 600 K. |
| title | Ambiguity in B-Site cation ordering: A Case study of the double perovskite Ca$_2$CoNbO$_6$ |
| topic | Materials Science |
| url | https://arxiv.org/abs/2605.23558 |