Despite the inaccessibility of a temperature at exactly absolute zero, scientists have been able to get very close. The Low Temperature Laboratory at Aalto University cooled a piece of rhodium metal to 0.0000000001 K using a nuclear demagnetization refrigerator.
A nuclear demagnetization refrigerator cools a material by aligning the spin of nuclei using a strong magnetic field.
Info by Dr. Christopher S. Baird
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