scholarly journals Solid-state chemistry of early transition-metal oxides containing d0 and d1 cations

1997 ◽  
Vol 7 (12) ◽  
pp. 2297-2306 ◽  
Author(s):  
Nattamai S. P. Bhuvanesh ◽  
Jagannatha Gopalakrishnan
Keyword(s):  
Solid State ◽  
Transition Metal ◽  
Metal Oxides ◽  
Transition Metal Oxides ◽  
Solid State Chemistry ◽  
Early Transition Metal ◽  
Early Transition

New Possibilities for Ferromagnetic Semiconductors

MRS Bulletin ◽  
2003 ◽  
Vol 28 (10) ◽  
pp. 729-733 ◽  
Author(s):  
Scott A. Chambers ◽  
Robin F.C. Farrow
Keyword(s):  
Solid State ◽  
Transition Metal ◽  
Metal Oxides ◽  
Transition Metal Oxides ◽  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Solid State Chemistry ◽  
Ferromagnetic Semiconductors ◽  
Magnetic Impurities ◽  
Critical Question

AbstractNew candidate ferromagnetic semiconductors have recently been grown by doping semiconducting transition-metal oxides with magnetic impurities. Some of these exhibit ferromagnetism at and above room temperature. The critical question is why? In many cases, complex solid-state chemistry is involved in the synthesis and drives the resulting properties. The observation of room-temperature ferromagnetism in these materials must be accompanied by a careful identification of the phases and structures present in order to accurately identify the origin of the magnetism.

Early Transition Metal Oxides and a Pinch of Salt: New Synthetic Routes to Titanates and Niobates

1996 ◽  
Vol 453 ◽  
Author(s):  
M. J. Geselbracht ◽  
R. J. Scarola ◽  
D. Ingram ◽  
C. Green ◽  
J. H. Caldwell
Keyword(s):  
Transition Metal ◽  
Metal Oxides ◽  
Transition Metal Oxides ◽  
Molten Salts ◽  
Calcium Titanate ◽  
Mixed Metal Oxides ◽  
Mixed Metal ◽  
Early Transition Metal ◽  
Synthetic Routes ◽  
Early Transition

AbstractMolten salts have traditionally been used as recrystallizing solvents for the crystal growth of mixed metal oxides. In recent years, many examples of the direct preparation of mixed metal oxides from molten salt solutions have been reported. We have been exploring the use of chloride melts as a reaction media to prepare complex early transition metal oxides. Specific examples of new synthetic routes to interesting titanates and niobates will be presented. In one case, we have prepared a series of layered niobate perovskite solid acids from molten salts at temperatures well below those traditionally used in solid state syntheses. In the second case, we have discovered a new synthetic route to a poorly characterized reduced calcium titanate that is otherwise very difficult to make. The synthesis and characterization of these two classes of compounds will be described.

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