This property is key when choosing the storage medium for magneto-optical devices - too high and it will be too difficult to 
This property is key when choosing the storage medium for magneto-optical devices - too high and it will be too difficult to get the medium that hot, but too low and other portions of the disk might become demagnetized. For ten points, name this characteristic, which is 200 degrees Celsius for the materials inside magneto-optical disks, but is 750 degrees for iron, above which a magnetic material loses its magnetization.
This property is key when choosing the storage medium for magneto-optical devices - too high and it will be too difficult to get the medium that hot, but too low and other portions of the disk might become demagnetized.
{Curie temperature}