STRUCTURAL AND MAGNETIC PROPERTIES OF (R0.5A0.5)NIO3 PEROVSKITES (R = GD, YB AND A = CE, TH)
2007 ◽
Vol 21
(18n19)
◽
pp. 3443-3447
Keyword(s):
Four perovskite compounds with nominal compositions of ( Gd 0.5 Th 0.5) NiO 3, ( Gd 0.5 Ce 0.5) NiO 3, ( Yb 0.5 Th 0.5) NiO 3 and ( Yb 0.5 Ce 0.5) NiO 3 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.
2014 ◽
Vol 146
(3)
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pp. 224-229
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2015 ◽
Vol 647
◽
pp. 419-426
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2013 ◽
Vol 337-338
◽
pp. 58-64
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2013 ◽
Vol 326
◽
pp. 35-40
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2008 ◽
Vol 22
(16)
◽
pp. 2537-2544
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2002 ◽
Vol 8
(2)
◽
pp. 215-219
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2011 ◽
Vol 2
(8)
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1996 ◽
Vol 153
(3)
◽
pp. 337-346
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