source:physicsworldA new type of fractal has appeared unexpectedly in a class of magnets known as spin ices. The new fractals, which were observed in clean three-dimensional crystals of dysprosium titanate (Dy2Ti2O7), appear to come from excitations of magnetic monopoles in the material, and could have applications in magnetocalorics, spintronics, information storage and quantum computing.Fractals are ubiquitous in nature and exist at many scales, from the macro to the nano. Everyday examples include snowflakes, networks of blood vessels, mountain landscapes and coastlines. To qualify as a fra...
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2023
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source:umaineIn his career as a University of Maine geologist, Martin Yates has been recruited to help investigate geologic anomalies, but none like the one found last year on Pennington Mountain in Aroostook County. His work contributed to a major discovery of critical mineral resources of rare earth elements and trace metals that was the first of its kind in the eastern half of the U.S. Chunzeng Wang, a professor at the University of Maine at Presque Isle, and John Slack, a U.S. Geological Survey scientist emeritus from Farmington, met with Yates at his microprobe lab in the Bryand Glob...
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2023
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source：learningenglishA recent study says there are enough rare earth metals on Earth for new “low-carbon electricity generation” technologies.Rare earth metals come from minerals found in countries around the world.The researchers said more mining is needed to make more of the valuable metals available to industry. Rare earth metals are in demand for products such as magnets, wind turbines, solar panels and computers. All are part of the “green energy” push to remove carbon gases from electricity generation.The researchers said the amount of minerals available is enough to supply a switch to ...
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2023
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source：newscenterLithium-ion batteries have revolutionized electronics and enabled an accelerating shift toward clean energy. These batteries have become an integral part of 21st century life, but we’re at risk of running out before 2050. The main elements used in each battery – lithium, nickel, and cobalt metals as well as graphite – are increasingly scarce and expensive, and there is little environmental or fair-labor oversight of some of the remaining international supply chains.There is a pressing need to start reusing the materials we’ve already dug up and to make the battery production p...
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2023
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