Curie temperature
• D+35+20
A loop of Nickel Wire is attached to a heavy object by a light string. It is held in mid-air trough attraction to a strong magnet. If the loop is heated with flame from a lighter the internal temperature of the nickel will surpass the Curie temperature of Nickel and the loop will suddenly drop to the ground.

Related Demos
D+35+1
Inverter Magnet D+35+0
Wobbly bar: Magnets in frame balanced by repulsive forces. D+35+2
Making a magnet by electromagnetic induction. D+35+4
Making small magnets by breaking up a larger magnet. D+35+6
Barkhausen effect: Magnet and coil with soft iron core. D+35+7
Barkhausen effect model: Many tiny magnets on pivots on OHP. D+35+9
Para and diamagnetic materials in magnetic field with OHP. D+35+10
Para and diamagnetic materials in magnetic field with arc lamp. D+35+12
Linear motor: An iron core jumps into a solenoid. D+35+14
YBaCuO pellet with magnet in liquid nitrogen on TV camera. D+35+15
Mass Driver D+35+16
Mass driver: One of these balls is not like the other