Comparison of the crystal chemistry and electrical properties of La2−xAxNiO4 (A = Ca, Sr, and Ba)
✍ Scribed by J.P. Tang; R.I. Dass; A. Manthiram
- Book ID
- 114065435
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 327 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0025-5408
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The enthalpy of formation of the solid solution series \(\mathrm{La}_{2,}, A_{x} \mathrm{NiO}_{4-y}(A=\mathrm{Ba}, \mathrm{Sr} ; 0 \leq x \leq 0.7\) and \(-0.18 \leq y \leq 0.04\) ) has been measured using high-temperature reaction calorimetry. As barium or strontium is substituted for lanthanum, th
Magnetic properties were investigated for single crystals of La 2Àx Ca x CoO 4 ð0:5pxp0:8Þ and for polycrystalline samples of La 2Àx Ba x CoO 4 ð0:5pxp0:9Þ. In the Ca system, the effective moment m eff decreased with increasing x from 4.0 m B ðx ¼ 0:5Þ to 3.0 m B ðx ¼ 0:720:8Þ, accompanied by a stee