In the past few years, considerable research work has been carried out in order to understand the origin of ferromagnetism in un-doped oxide semiconductors. The debate is still open, but… Click to show full abstract
In the past few years, considerable research work has been carried out in order to understand the origin of ferromagnetism in un-doped oxide semiconductors. The debate is still open, but most of the experimental and theoretical studies suggested that defects may induce room-temperature ferromagnetic order. This brief review will focus on some very recent works based on the use of mechanical milling as a processing approach in order to induce defects and transform the initial diamagnetic or paramagnetic powders to ferromagnetic order.
               
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