The role of demagnetization factor in determining the ‘true’ value of the Curie temperature

Journal Article · Fri May 20 00:00:00 EDT 2011 · Journal of Magnetism and Magnetic Materials

DOI:https://doi.org/10.1016/j.jmmm.2011.05.012· OSTI ID:1031636

Zverev, V I; Gimaev, R R; Tishin, A M; Mudryk, Ya; Pecharsky, V K

The Curie temperature, T{sub c}, 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 T{sub c} 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 T{sub c}.

• Research Organization: Ames Lab., Ames, IA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC02-07CH11358
• OSTI ID: 1031636
• Report Number(s): IS-J 7529; JMMMDC; TRN: US201201%%771
• Journal Information: Journal of Magnetism and Magnetic Materials, Vol. 323, Issue 20; ISSN 0304-8853
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
APPROXIMATIONS
CURIE POINT
DEMAGNETIZATION
FERROMAGNETISM
GADOLINIUM
MAGNETIZATION
MONOCRYSTALS