Para and Diamagnetism
[L | t+ | ★★★]
Testing a selection of compounds for magnetic susceptibility, by suspending them between the poles of an electromagnet.
[In-Depth Description]
Diamagnetic Levitation
[S | t+ | ★★★]
Stable levitation of one magnet by another is usually prohibited by Earnshaw's Theorem, but the introduction of diamagnetic material at special locations can stabilize such levitation.
[In-Depth Description]
Paramagnetism of Oxygen
[S/M | t++ | —]
Liquid O2 is attracted to the poles of a permanent magnet.
[In-depth description]
Image Current
[L | t+ | ★★★]
An image current is created in a ferromagnetic material in the presence of a real current.
[In-depth description]
Hysteresis
[M/L | t+ | —]
Hysteresis loops of iron and ferrite are displayed on CRO.
The Barkhausen Effect
[M | t+ | ★★★]
Hear the sound of magnetic domains aligning as a bar magnet is brought towards iron sample.
[In-Depth Description]
Magnetic Bubbles
[S | t+ | ★★]
Wafer thin magnetic garnet under microscope reveals direction of magnetic domain alignment as light and dark pattern.
[In-Depth Description]
Bar Magnet Domains
[S | t | —]
Magnetic domains are modeled on the OHP.
Curie Point
[M | t+ | —]
Iron wire is not attracted to a magnet when its temperature is raised above 770 deg. C.
Hall Effect
[s | t++ | ★★★]
The Hall voltage of a semiconductor is measured as a function of applied magnetic field.
[In-Depth Description]
Contact Us
Mailing Address: Lecture Demonstration Services, Science Center, Rm B-08A, 1 Oxford Street, Cambridge, MA 02138
Campus Location: Science Center B-08A | Tel: (617) 495-5824 | Email: scidemos-at-fas.harvard.edu