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Effect of Spin State of Ni3+Ions on Electrical Properties of Nd(Cr1−xNix)O3

✍ Scribed by Hideki Taguchi

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
310 KB
Volume
134
Category
Article
ISSN
0022-4596

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✦ Synopsis

Orthorhombic perovskite-type Nd(Cr 1؊x Ni x )O 3 (0.04x40.6) was synthesized in a flow of pure oxygen gas. Magnetic measurement indicates that the 1/ -T curves of Nd(Cr 1؊x Ni x )O 3 are linear and have deflection points (+480 K) in the range 0.24 x40.6. Measurements of the electrical resistivity ( ) and the Seebeck coefficient ( ) indicate that Nd(Cr 1؊x Ni x )O 3 (0.04x4 0.4) is a p-type semiconductor, while Nd(Cr 0.4 Ni 0.6 )O 3 (x ‫)6.0؍‬ is an n-type semiconductor. log -1000/T curves are linear and have the deflection points at +500 K (0.24x40.6). Calculation of the activation energy (E a ) indicates that E a (3004T4 500 K) is slightly lower than E a (5004T4900 K). From these results, it is obvious that the electrical properties are strongly affected by the spin state of the Ni 3؉ ion.

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