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Interest in oxide-based semiconductor electronics has exploded in recent years, fueled largely by the ability to grow atomically precise layers of various oxide materials.
One of the most important materials in this burgeoning field is strontium titanate (SrTiO3), a nominally nonmagnetic wide-bandgap semiconductor, and researchers at Los Alamos National Laboratory have found a way to magnetize this material using light, an effect that persists for hours at a time.
“One doesn’t normally think of this material as being able to support magnetism. It’s supposed to be useful — but magnetically uninteresting — stuff. So when we started shining light on it and saw what appeared to be extremely long-lived magnetic signals — that persisted for hours even after we turned the light off — it came as quite a surprise,” said Scott Crooker, lead scientist on the project at Los Alamos.
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