Demonstrations

Curie Point of Permanent Magnets

Code Number :	5G50.10
Disclaimer:	*Disclaimer* These demonstrations are provided only for illustrative use by persons affiliated with The University of Iowa and only under the direction of a trained instructor or physicist. The University of Iowa is not responsible for demonstrations performed by those using their own equipment or who choose to use this reference material for their own purpose. The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources. Performing all or any portion of any of these demonstrations, with or without revisions not depicted here entails inherent risks. These risks include, without limitation, bodily injury (and possibly death), including risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition; and property loss or damage. Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.
Condition :	Good
Principle :	Loss of Magnetic Properties
Area of Study :	Electricity & Magnetism
Equipment :	Point on Flexible Rod, Bunsen Burner.
Procedure :	Arrange the magnet and flexible rod so that the magnet just barely holds the rod to it. Heat the junction of the magnet and the rod with the Bunsen burner and observe the loss of magnetic attraction due to heat (Curie Point).

Web Sites

"Chapter 1: Magnetism: Building a Magnetic Heat Engine", www.scitoys.com

References

S. Velasco, F. L. Roman, "Determining the Curie Temperature of Iron and Nickel", TPT, Vol. 45, # 6, Sept. 2007, p. 387.

Czeslaw Kizowski, Sylwia Budzik, Jozef Cebulski, "Finding the Curie Temperature for Ferromagnetic Materials", TPT, Vol. 45, # 1, Jan. 2007, p. 31.

Davod E. Wilson, "Curie Point, Again", TPT, Vol. 27, # 5, May 1989, p. 374.

George Barnes, "Demonstrating the Curie Point in Nickel", TPT, Vol. 24, # 2, Feb. 1986, p. 87.

George Barnes, "Rotary Curie-Point Heat Engine", TPT, Vol. 24, # 4, Apr. 1986, p. 205.

F. A. Levi, E. Bilancia, "Curie Point Experiment", TPT, Vol. 24, # 4, Apr. 1986, p. 201.

Yaakov Kraftmakher, "Spontaneous Magnetization of Ferromagnets", AJP, Vol. 73, # 12, Dec. 2005, p. 1191.

Hans Toftlund, "A Rotary Curie Point Magnetic Engine: A Simple Demonstration of a Carnot-Cycle Device", AJP, Vol. 55, # 1, Jan. 1987, p. 48.

E. V. Smith, "An AC Bridge Method for the Measurement of Curie Points", AJP, Vol. 33, # 2, Feb. 1965, p. 167.

Es-6, 8: Freier and Anderson, A Demonstration Handbook for Physics.

B-390: "Canadian Quarters & Dimes", DICK and RAE Physics Demo Notebook.

E-10a: Wallace A. Hilton, Physics Demonstration Experiments.

Yaakov Kraftmakher, "7.15, Curie Point", Experiments and Demonstrations in Physics, ISBN 981-256-602-3, p. 483.

Yaakov Kraftmakher, "5.6, Curie Point", Experiments and Demonstrations in Physics, ISBN 981-256-602-3, p. 331.

Yaakov Kraftmakher, "3.3, Skin Effect", Experiments and Demonstrations in Physics, ISBN 981-256-602-3, p. 161.

Arthur B. Ellis, Margret J. Geselbracht, Brian J. Johnson, George C. Lisensky, William R. Robinson, "The Curie Point of Nickel", Teaching General Chemistry - A Materials Science Companion, p. 34.

"Curie Point", Science Snackbook, 34.1 - 34.2.

Ron Hipschman, "Curie Point", Exploratorium Cookbook III, 181.1 - 181.4.

Mail questions or comments about this site to: Dale Stille