Many physical substances undergo phase transitions when subject to changes in environmental parameters. The transition of ice into water and water into steam are familiar examples. Similarly, chromium undergoes a phase transition at a specific temperature, called the N´eel temperature changing its magnetic order from the anti-ferromagnetic to the para-magnet state. This magnetic reordering is accompanied by a change in volume. In other words, the phase transition is a magneto-elastic phenomenon. In this experiment, we study the phase transition of chromium by directly measuring the volume change. Several important thermodynamical concepts will also be navigated.
|Sample Results||Voltage Vs TemperatureVoltage Vs No. of samples|
|Hardware Manual||Precision Instrumentation Amplifier AD624|
|Version||15 Aug 2011|
Further Readings and References
- Mathematical Methods , Zeemansky and Dittman
- Investigation of thermal hysteresis near the Neel transition in chromium Journal of Physics. F. Metal physics , I.S. Williams, R. Street 2551 , (1980).
- Thermal Expansion of Chromium Single Crystals at the Néel Temperature The Physics Society of Japan , Takehiko Matsumoto, Tadayasu Mitsui , (1969).
- Calorimetric studies of the order of magnetic phase transitions in Cr and some Cr alloys at the Neel point Journal of Physics.F Metal physics , G Benediktssont, H U Astromt, K V Rao , 5 , (1975).