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The role of demagnetization factor in determining the ‘true’ value of the Curie temperature |
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| Authors: | V.I. Zverev R.R. Gimaev A.M. Tishin Ya. MudrykK.A. Gschneidner Jr. V.K. Pecharsky |
| Affiliation: | a Faculty of Physics, M.V. Lomonosov Moscow State University, 119991 Moscow, Russia b Advanced Magnetic Technologies and Consulting LLC, 142190, Troitsk Russia c The Ames Laboratory U.S. Department of Energy, Iowa State University, Ames, IA 50011-3020, USA d Department of Materials Science and Engineering, Iowa State University, Ames, IA 50011-2300, USA |
| Abstract: | The Curie temperature, TC, is the temperature above which a material loses its long-range ferromagnetic order. Considering the equation of state of a ferromagnet in the mean-field approximation it has been shown theoretically that the value of the demagnetization factor N has a significant influence on the perceived location of TC on the temperature scale. A series of precise measurements of magnetization using two differently shaped single crystals of high-purity gadolinium was carried out to prove this result experimentally and develop a procedure leading to the ‘true’ value of TC. |
| Keywords: | Ferromagnetism Curie temperature Demagnetization effect |
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