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Relationship between Crystal Structure and Electrical Properties of Nd(Cr1−xFex)O3

✍ Scribed by Hideki Taguchi

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
323 KB
Volume
131
Category
Article
ISSN
0022-4596

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✦ Synopsis

Perovskite-type Nd(Cr 1؊x Fe x )O 3 was synthesized in the range 0.04x41.0, and has the orthorhombic GdFeO 3 -type structure with space group Pnma. The increase of the (Cr, Fe)-O distance and the effective magnetic moment ( eff ) indicates that the Fe 3> ion is in the high-spin state with the (d ) 3 (d ) 2 electronic configuration. Rietveld analysis indicates that the increase of the (Cr, Fe)-O distance and the decrease of the angles for (Cr, Fe)-O(1 and 2)-(Cr, Fe) make -bonding decrease. From the electrical resistivity ( ) measurement, Nd(Cr 1؊x Fe x )O 3 is a semiconductor with activation energy (E a )+0.16-+0.89 eV. The temperature independence of the Seebeck coefficient ( ) indicates that the mobility ( ) decreases with increasing x.

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