ISSN:
1572-9567
Keywords:
entropies of transition in V2O3 alloys
;
metal-insulator transitionin V2O3 alloys
;
V2O3-Cr2O3 and V2O3-Al2O3 alloys
;
phase diagram for V2O3-Al2O3alloys
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Measurements of the entropy change are reported for the high-temperature metal-insulator (MI) transitions in the (V1−xCrx)2O3 and (V1−xAlx)2O3 systems. It is emphasized that the entropy of the I phase exceeds that of the M phase. Evidence is presented to show that the M and I phases coexist over a narrow temperature range. The transformation is attended by enormous hysteresis effects; these indicate that the lattice plays an important role in the transition. The probable role of Cr3+ and Al3+ as a dopant in the V2O3 lattice is briefly discussed. A phase diagram for the dilute V2O3-Al2O3 alloy system is presented.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00504520
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