التفاصيل البيبلوغرافية
| العنوان: |
Phase formation, crystal structures and magnetic properties of perovskite-type phases in the system La 2 Co 1+ z (Mg x Ti 1- x ) 1- z O 6 |
| المؤلفون: |
Shafeie, S., Grins, J., Istomin, S.Ya., Karvonen, L., Chen, S.A., Chen, T.H., Weidenkaff, A., Karppinen, M., Sirtl, T., Svensson, G. |
| بيانات النشر: |
Elsevier |
| سنة النشر: |
2011 |
| مصطلحات موضوعية: |
cobaltates, perovskite, X-ray diffraction, neutron diffraction, magnetic susceptibility, electron diffraction, XANES |
| الوصف: |
Perovskite-type cobaltates in the system La 2 Co 1+ z (Mg x Ti 1− x ) 1− z O 6 were studied for z =0≤ x ≤0.6 and 0≤ x <0.9, using X-ray and neutron powder diffraction, electron diffraction (ED), magnetic susceptibility measurements and X-ray absorption near-edge structure (XANES) spectroscopy. The samples were synthesised using the citrate route in air at 1350 °C. The space group symmetry of the structure changes from P 2 1 / n via Pbnm to R 3¯ c with both increasing Mg content and increasing Co content. The La 2 Co(Mg x Ti 1− x )O 6 ( z =0) compounds show anti-ferromagnetic couplings of the magnetic moments for the Co below 15 K for x =0, 0.1 and 0.2. XANES spectra show for the compositions 0≤ x ≤0.5 a linear decrease in the L 3 /( L 3 + L 2 ) Co– L 2,3 edge branching ratio with x , in agreement with a decrease of the average Co ion spin-state, from a high-spin to a lower-spin-state, with decreasing nominal Co 2+ ion content. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
English |
| تدمد: |
0022-4596 |
| Relation: |
Journal of Solid State Chemistry--J. Solid State Chem.--journals:1786--0022-4596--1095-726X; empa:4663; journal id: journals:1786; e-issn: 1095-726X; ut: 000286774600026; local: 16130; scopus: 2-s2.0-78650849975 |
| DOI: |
10.1016/j.jssc.2010.11.002 |
| الاتاحة: |
https://doi.org/10.1016/j.jssc.2010.11.002 |
| رقم الانضمام: |
edsbas.D0814C56 |
| قاعدة البيانات: |
BASE |