Temperature and Magnetism Concept

Demonstrations in Temperature and Magnetism

Vertical metal stand on black tripod base with torsion wire hanging from top clamp, permanent magnet and burner assembly on middle clamps, rubber tube connecting to blue propane cylinder at right
Safety

Curie Temperature

Demonstrates the Curie temperature phase transition: an iron rod held against a permanent magnet by ferromagnetic attraction is heated until it loses its magnetism and swings away, then cools and …
Magnetic disk heat motor: a permalloy disk mounted horizontally on a pivot next to a horseshoe magnet, with a Bernzomatic propane torch positioned to heat the disk rim
Safety

Magnetic Disk Heat Motor

A permalloy disk rotates continuously when heated by a propane torch near a horseshoe magnet. Students observe the Curie temperature transition: heated sections lose ferromagnetism and are no longer attracted, …
Apparatus showing glass dish with watch glass and heat pad on left, stacked hard drive magnets on aluminum plate with blue lead brick on lab jack at right
Safety

Dysprosium in Liquid Nitrogen

Demonstrates temperature-dependent magnetic phase transitions. Dysprosium pellets cooled in liquid nitrogen (77 K) become ferromagnetic and stick to a magnet. As they warm, they pass through a helimagnetic phase and …
Black superconducting levitator with logo hovering above a clear acrylic plate holding a 2x3 array of silver cube magnets
Safety

Superconductor

YBCO superconductors cooled with liquid nitrogen levitate above (or below) permanent magnets, demonstrating the Meissner effect and flux pinning. Students observe stable levitation, frictionless motion on a magnetic track, and …