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Long known in physics are the electron “spin waves” that behave like pond ripples but through a magnet. But recently, a group of researchers looked into something brand-new known as “spin excitons,” which they present in a fresh study that was just published in Nature Communications. Although these new waves also reverberate through a magnet, they do so as a coherent wave.Nickel molybdate crystals comprised of two parts nickel, three parts molybdenum and eight parts oxygen (left) and an image of crystal electric field spin excitons from tetrahedral sites in nickel molybdate crystals (right). For the study, the researchers examined a layered magnetic crystal known as nickel molybdate and found it exhibited unusual properties.

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