Orbital Properties of Vanadium Ions in Magnetically Ordered V2O3
Vanadium sesquioxide (V2O3) displays a number of electronic, magnetic and structural properties that are challenging to interpret and explain1–7. At room temperature V2O3 has the corundum structure with space group \(R\bar 3c\) , and it is metallic and paramagnetic. On reducing the temperature the corundum structure distorts to a monoclinic structure with space group I2/a. The structural transition in the temperature range 150 – 160K is strongly first-order and ferroelastic. Accompanying the transition are a change from metallic to insulating behaviour and the onset of antiferromagnetic order3. The metal-insulator transition is viewed as a classic Mott transition, in which spin and orbital degrees of freedom are independent.
KeywordsMonoclinic Structure Spatial Symmetry Orbital Moment Orbital Magnetization Trigonal Axis
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