This innovative experiment entails the determination of the Curie point of a ferromagnetic alloy. An alternating current is passed through the alloy, (also used as a heating element in industrial furnaces). The alloy, at room temperature, is attracted towards a strong permanent magnet while the voltage, current and time are constantly monitored. As the alloy heats up, a point reaches where the alloy loses its magnetism and snaps away from the magnet. The Curie temperature is then determined from the current, voltage, time, surface area, length of the alloy and its emissivity. This experiment will be performed in the close supervision of the instructor, who will guide the students through the appropriate safety protocols.
|Hardware Manual||Resistance Heating Alloys and Systems for Industrial Furnaces|
|Version||31 October 2013|
Further Readings and References
- Hysteresis in Light Bulb: Connecting Electricity with Thermodynamics with simple experiments and simulations European Journal of Physics , D.A. Clauss, R.M. Ralich and R.D. Ramsier , 22 385 , (2001).
- Continuous Magnetization Patterns in Amorphous Ribbons IEEE Transactions on Magnetics , S. Rudolf, H. Giselhe , 37 2245 , (2001).
- Simple Experiment to Help Students Understanding Magnetic Phenomena The Physics Teacher , K. Browne, D.P. Jackson , 45 425 , (2007).
- Finding the Curie Temperature for Ferromagnetic Materials The Physics Teacher , K. Czestaw, S. Budzik , and C. Jozef , 45 31 , (2007).
- Measurement of Curie Temperature for Gadolinium: A laboratory Experiment for Students European Journal of Physics , T. Lewowski, K. Wozniak , 18 453 , (1997).
- Determining the Curie Temperature for Iron and Nickel The Physics Teacher , S. Velasco, F.L. Roman , 45 387 , (2007).