The phase transition M1→T in V1−xGaxO2

Insulator to correlated metal transition inV1−xMoxO2

“…This appears to be the case for insulating V 1−x Nb x O 2 , where the Nb dopant is 5+, 4d 0 spin 0, and every doped Nb 5+ quantitatively releases one localized spin 1 moment, as a V 4+ -V 4+ spin singlet pair becomes a V 3+ ͑3d 2 , spin 1͒-Nb 5+ pair. 10,[27][28][29]38 Local moments observed in insulating Ga 39 and W 40 doped VO 2 have also been attributed to broken singlets. V 1−x Mo x O 2 , however, is much less straightforward, as the induced magnetic moment is not directly proportional to the Mo concentration and never reaches the local-moment spin 1 2 value.…”

Basic aspects of the metal–insulator transition in vanadium dioxide VO2: a critical review

“…However, the first published phase diagrams were incomplete with regard to the number and of the structure of new phases stabilized between the R and M 1 phases of pure VO 2 . It is now well established that two new insulating M 2 and T phases were found to intercalate for small amount of Cr [37,38], Al [39,43,65], Fe [40,66,67] and Ga [41,68,69]. Note that the triclinic T phase is sometimes still incorrectly named in the literature as the monoclinic M 3 phase, a variant of M 2 , previously suggested in V 1−x Cr x O 2 [35].…”

New three level topology with shared components: Properties, losses, and control strategy

“…12, with this new strategy the losses on components are slightly more evenly distributed. Some Although this control improves the distribution of losses, it does not take into account the rms current and the time of conduction for each component [10].…”

“…One of the most popular is the NPC (Neutral Point Clamp) [3] or the Active-NPC [1]. The advantage of this last topology is to offer several solutions to achieve given level and several control strategies that balance the losses in all components of the topology [4].…”