Magnetic refrigeration is a cooling technology that uses the magnetocaloric effect to attain low and refrigerator temperatures. It was discovered in the 1930s by Weiss, Piccard, Debye, and Giaque through the observation that applying or removing a magnetic field to certain materials causes a temperature change. The magnetocaloric effect is a magneto-thermodynamic phenomenon in which the temperature of a suitable material changes with exposure to a changing magnetic field. Gadolinium alloys are commonly used as they heat up in a magnetic field.

1. PREPARED BY
FOUZIYA K

2. PRESENTED BY,
FOUSIYA K
2nd MSc.PHYSICS

4. •It is a cooling technology based on
magnetic caloric effect
•Used to attain extremely low
temperature as well as the ranges
used in common refrigerators

6. •Descovered by: P.Weiss & A.Piccard
• Fundamental principle suggested:P
Debye & W Giaque
•First working magnetic refrigerators
were constructed by several groups
beginning in 1933

7. •Magneto thermodynamic
phenomenon
•In which temperature change of a
suitable material is caused by
exposing the material to a changing
magnetic field.

10. GADOLINIUM ALLOY HEATS UP INSIDE A MAGNETIC FIELD

11. MCE can be quantified with the equation
∆Tad=-∫((T/C(T,H))H((∂M(T,H)/∂T))H dH

27. •“WHO DISCOVERED MCE”-Journal of magnetism by Pecharsky V
K
•Wikipedia