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The crystal and magnetic structure of Ti-substituted LaCrO3 |
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| Authors: | A. Martinelli M. Ferretti M.R. Cimberle |
| Affiliation: | a CNR-SPIN, C.so Perrone 24, 16152 Genova, Italy b Dipartimento di Chimica e Chimica Industriale, Università di Genova, Via Dodecaneso 31, 16146 Genova, Italy c CNR-IMEM, Via Dodecaneso 33, 16146, Genova, Italy d Institute Laue - Langevin, 6 rue Jules Horowitz, 38042 Grenoble Cedex 9, France |
| Abstract: | The crystal and magnetic structures of LaCrO3 and La(Cr0.90Ti0.10)O3 have been investigated between 5 and 350 K by means of neutron powder diffraction and DC magnetic measurements. Both compounds are characterized by an antiferromagnetic Gx-type ordering at low temperature. Structural features suggest the occurrence of Ti in the tetra-valent state. Despite the mixed valence induced by Ti-substitution leading to the occurrence of the Jahn-Teller species Cr2+, no evidence for long range ferromagnetism can be detected. On account of a miscibility gap, a higher degree of Ti-substitution at the Cr site cannot be achieved; as a consequence the solid state solubility of Ti in LaCrO3 at 1573 K has been ascertained. |
| Keywords: | A. Oxides. A. Magnetic materials C. Neutron scattering D. Crystal structure D. Magnetic properties |
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