Magnetic refrigeration
Overview
Temperature
Temperature is a physical property of matter that quantitatively expresses the common notions of hot and cold. Objects of low temperature are cold, while various degrees of higher temperatures are referred to as warm or hot...
s (well below 1 K
Kelvin
The kelvin is a unit of measurement for temperature. It is one of the seven base units in the International System of Units and is assigned the unit symbol K. The Kelvin scale is an absolute, thermodynamic temperature scale using as its null point absolute zero, the temperature at which all...
), as well as the ranges used in common refrigerator
Refrigerator
A refrigerator is a common household appliance that consists of a thermally insulated compartment and a heat pump that transfers heat from the inside of the fridge to its external environment so that the inside of the fridge is cooled to a temperature below the ambient temperature of the room...
s, depending on the design of the system.
The effect was first observed by the German physicist Emil Warburg
Emil Warburg
Emil Gabriel Warburg was a German Jewish physicist who during his career was professor of physics at the Universities of Strassburg, Freiburg and Berlin. He was president of the Deutsche Physikalische Gesellschaft 1899-1905. He was a friend of Albert EinsteinHe was a member of the Warburg family...
(1880) and the fundamental principle was suggested by Debye
Peter Debye
Peter Joseph William Debye FRS was a Dutch physicist and physical chemist, and Nobel laureate in Chemistry.-Early life:...
(1926) and Giauque
William Giauque
William Francis Giauque was an American chemist and Nobel laureate recognised in 1949 for his studies in the properties of matter at temperatures close to absolute zero...
(1927).
