Abstract
Four perovskite compounds with nominal compositions of (Gd 0.5Th0.5)NiO3, (Gd0.5Ce 0.5)NiO3, (Yb0.5Th0.5)NiO 3 and (Yb0.5Ce0.5)NiO3 were prepared by a polymeric citrate precursor method. They were either slow-cooled in the furnace or quenched to room temperature. All of them have monoclinic symmetry. Quenched samples have a slightly bigger unit cell volume and longer Ni-O bond length, and a smaller grain size than that of the furnace-cooled compounds. All samples are paramagnetic insulators in the range of 2 K to 300 K. The Th containing compounds have larger tolerance factor and Ni(1)-O(1)-Ni(2) bond angle than that of the Ce containing compounds. No mixed valence of Ce, Th and Ni is observed in these samples.
| Original language | English |
|---|---|
| Pages (from-to) | 3443-3447 |
| Number of pages | 5 |
| Journal | International Journal of Modern Physics B |
| Volume | 21 |
| Issue number | 18-19 |
| Publication status | Published - 2007 Jul 30 |
All Science Journal Classification (ASJC) codes
- Statistical and Nonlinear Physics
- Condensed Matter Physics
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Chen, J. W., Liu, H. M., Kao, H. C. I., Sheu, H. S., Lee, J. F., Ling, D. C., Pong, W. F., & Horng, L. (2007). Structural and magnetic properties of (Ro0.5A 0.5)NIO3 perovskites (R = GD, YB and A = CE, TH). International Journal of Modern Physics B, 21(18-19), 3443-3447.