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I've recently become fascinated with a cryo cooling method known as "magnetic refrigeration". Here is the Wikipedia article. I was wondering if there is a list of magnetocaloric materials.

Specifically, I was wondering if the chemical compound Yittrium Barium Copper Oxide (YBCO), a high-temperature superconductor, is in this list. It would be wonderful to refrigerate this superconductor with magnetism rather than with (disposable) liquid nitrogen. Whereas the liquid nitrogen would be used up, a magnetic refrigeration setup only consumes electricity and is a more permanent solution to refrigerating the superconductor.

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Any material that undergoes a phase transition of its magnetic properties could be used as a magnetic refrigerant. This transition happens at a temperature called "Curie" temperature. This would be analogous to the boiling temperature of a liquid used in conventional vapor-compressor refrigerators.

The transition temperature defines to some extent the hot and cold end temperatures of the refrigerator. This type of refrigeration is apparently very efficient, but needs of a high magnetic field to magnetize intermittently the magnetocaloric material.

There is increasing interest to apply this technology for ambient temperature cooling. Many prototypes have been built using Gadolinium metal. See imugica.com for more details on the mathematical modelling of such machines

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