Computer-controlled experiments are described for observing hysteresis loops of a ferromagnet over a wide temperature range, including its Curie point, and for determining the temperature dependence of the spontaneous magnetization. A nickel-based alloy, Monel 400, is used as the sample.
REFERENCES
1.
P.
Heller
, “Experimental investigations of critical phenomena
,” Rep. Prog. Phys.
30
, 731
–826
(1967
).2.
S.
Arajs
, B. L.
Tehan
, E. E.
Anderson
, and A. A.
Stelmach
, “Critical magnetic behavior of nickel near the Curie point
,” Phys. Status Solidi
41
, 639
–648
(1970
).3.
B. K.
Tanner
, “Magneto-optical experiments on rare earth garnet films
,” Am. J. Phys.
48
, 59
–63
(1980
).4.
Y.
Kraftmakher
, “Student experiments on superconductivity
,” Eur. J. Phys.
20
, 161
–166
(1999
).5.
H. F.
Meiners
, W.
Eppenstein
, R. A.
Oliva
, and T.
Shannon
, Laboratory Physics
, 2nd ed. (Wiley
, New York, 1987
), experiment 11-6.6.
Yunchi
Meng
and Zhujian
Liang
, “Improvements in the demonstration of the hysteresis loops of ferromagnetic materials
,” Am. J. Phys.
55
, 933
–937
(1987
).7.
Y.
Kraftmakher
, “Curie point of ferromagnets
,” Eur. J. Phys.
18
, 448
–452
(1997
).8.
9.
10.
© 2005 American Association of Physics Teachers.
2005
American Association of Physics Teachers
AAPT members receive access to the American Journal of Physics and The Physics Teacher as a member benefit. To learn more about this member benefit and becoming an AAPT member, visit the Joining AAPT page.
