Magnetic Phase Transitions of a Ferromagnetic Alloy - PhysLab

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Magnetic Phase Transitions of a Ferromagnetic Alloy

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Student Manual

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
Experiment Code 1.4
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).

Pictorial Procedure

1. Provided apparatus

1. Provided apparatus

2. Connecting a digital volteter to the variac

2. Connecting a digital volteter to the variac

3. Clamping a clamp meter to any one of the variac output lead

3. Clamping a clamp meter to any one of the variac output lead

4. Set the variac at 0V, switch on the mains supply and press green START button

4. Set the variac at 0V, switch on the mains supply and press green START button

5. Checking for current leakage in the control box

5. Checking for current leakage in the control box

6. Current leakage check in the pole

6. Current leakage check in the pole

7. Current leakage test in the variac

7. Current leakage test in the variac

8. Testing the emergency stop button

8. Testing the emergency stop button

9. Circuit breaker check

9. Circuit breaker check

10. Set variac at 22V. The operating voltage range lies between 22-30V

10. Set variac at 22V. The operating voltage range lies between 22-30V

10. Set variac at 22V. The operating voltage range lies between 22-30V

11. Kanthal wire attached to the magnet

Curie_12n

12. Kanthal wire snapped away

Lab 1 | Tags: magnetism
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  • Home
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    • Alumni
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    • Lab-I (ENGG-100/PHY-100/200)
    • Lab-II (PHY 300/500)
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    • Fast Optics
    • Smart Physics
    • Single Photon Quantum Mechanics Lab
    • Chasing Cosmic Ray Muons at Physlab
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    • Research Stories
    • Class Activities
    • Courses Taught
    • Class Demonstrations
    • PhysDiary
    • Health and Safety
    • Lab Safety
    • Workplace Organization
  • Research
    • Research Themes
    • Research Internships
    • Research Stories
    • Physics WorldCup
      • International Young Physicists’ Tournament (IYPT) 2019
      • International Young Physicists’ Tournament (IYPT) 2018
      • International Young Physicists’ Tournament (IYPT) 2016
    • Hunerkada
    • Grants
    • Theses and Reports
    • Scientific Publications
    • Invited Talks (Selected)
  • Outreach
    • Media
      • Lectures, Podcasts and Interviews
      • Videobytes
      • YouTube Channel
      • Visitors
      • Testimonials
    • The Scientific Mind Through the Eyes of a Physics Experimenter
    • National Laboratory Immersion Program
      • First Lahore 2012
      • Second Sukkur 2013
      • Third Lahore 2014
      • Fourth Lahore 2016
    • Labview Workshop 2016
    • Open house
      • 2009-2015
      • Open house 2023
    • Khwarizmi Science Society
    • Helping Pakistan’s Universities
      • National University of Technology (NUTECH) 2019
      • Pakistan Institute of Engineering and Applied Sciences
        (PIEAS) 2019 (Final Phase)
      • Pakistan Institute of Engineering and Applied Sciences
        (PIEAS) 2019 (Phase 2)
      • Pakistan Institute of Engineering and Applied Sciences
        (PIEAS) 2018 (Phase 1)
      • National University of Science & Technology 2016
      • Habib University 2014
      • Preston University 2013
      • Ghulam Ishaque Khan Institute of
        Engineering Sciences and Technology 2011
      • Institute of Space Technology 2010
    • The National STEM School
      • STEM School (2018 – 2019)
      • STEM school (2016 – 2017)
    • Abdus Salam Memorial Lecture Series
  • Facilities
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