Abstract
We report investigations on polycrystalline LaCo1−xAlxO3 (x = 0–0.9) bulk samples. The solid state synthesized samples showed a coexistence of rhombohedral and monoclinic phases in the intermediate concentrations (0.2 ≤ x ≤ 0.5) and pure rhombohedral phase otherwise. The observed effect of Al doping on dc transport has been analysed on the basis of small polaron hopping mechanism. The magnetisation results presented give evidence of weak ferromagnetism and anomalous temperature dependence of coercivity which we associate to the canting of the localised high-spin Co(III) and anti-symmetric exchange interactions at low temperatures.
| Original language | English |
|---|---|
| Pages (from-to) | 366-373 |
| Number of pages | 8 |
| Journal | Journal of Materials Science |
| Volume | 50 |
| Issue number | 1 |
| State | Published - Jan 2015 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2014, Springer Science+Business Media New York.
Funding
The authors thank Prof. R.C. Budhani, DNPL for his encouragement and support. The authors greatly acknowledge Mr. Naval, Mr. Jai Tawale for the P-XRD and SEM micrographs, respectively. Aswin acknowledges CSIR for the financial support. AD acknowledges IFCPAR (4704-1) for the funding.
| Funders | Funder number |
|---|---|
| Council of Scientific and Industrial Research, India | |
| Indo-French Centre for the Promotion of Advanced Research | 4704-1 |