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Structural and magnetic aspects of La4(Co1-xNix)3O10+δ (0 ≤ x ≤ 1).
- Source :
-
Phase Transitions . Oct2015, Vol. 88 Issue 10, p979-990. 12p. - Publication Year :
- 2015
-
Abstract
- The Ruddlesden-Popper (RP3) type oxides, La4Co3O10+δ and La4Ni3O10+δ, form a complete solid solution. Powder X-ray and neutron diffraction data show that La4(Co1-xNix)3O10+δ is isostructural to the monoclinic La4Co3O10+δ structure (P21/a) described for all compositions without any further structural distortions as suggested in the literature. A slight elongation of the Co/Ni-O bonds facing the rock salt interlayer occurs for Ni-rich compositions. The magnetic properties of the solid solution series are mapped in the temperature range from 4 to 300 K, and the results are presented in a magnetic phase diagram. Three regimes with antiferromagnetic order (AF) exist at low temperatures, TN < 10 - 30 K. For x = 0.00, the AF is ascribed to Co(II), whereas a broader AF regime around x = 0.50 is ascribed mainly to Ni(II). Pauli paramagnetism is observed close to metallic La4Ni3O10+δ, x > 0.80. The possibility to tune the oxidation state of the transition metal atoms is demonstrated for La4Co3O10+δ, and exemplified by weakening of a temperatureinduced spin transition at around 480 K. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01411594
- Volume :
- 88
- Issue :
- 10
- Database :
- Academic Search Index
- Journal :
- Phase Transitions
- Publication Type :
- Academic Journal
- Accession number :
- 112685947
- Full Text :
- https://doi.org/10.1080/01411594.2015.1007374