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See Article History. Facts Matter. Start Your Free Trial Today. Learn More in these related Britannica articles:. Above absolute zero, thermal motions begin to disorder the magnetic moments.
At a temperature called the Curie temperature, which varies from material to material, the thermally induced disorder overcomes the alignment, and the ferromagnetic properties of the…. In practical terms, this theorem implies the impossibility of attaining absolute zero, since as a system approaches absolute zero, the further extraction of energy from that system becomes more and more difficult. Modern science has attained temperatures less…. The standard measure of temperature in the International System of Units is the Kelvin K scale, on which the only point established by arbitrary definition is the unique temperature at which the liquid, solid,….
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History at your fingertips. Sign up here to see what happened On This Day , every day in your inbox! Besides achieving a weird temperature state, the new work replicates a peculiar feature of the universe. Negative temperature systems also possess negative pressure, which on cosmic scales is causing the universe to expand faster and faster.
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