Premium
Critical Magnetic Behavior of Nickel near the Curie Point
Author(s) -
Arajs S.,
Tehan B. L.,
Anderson E. E.,
Stelmach A. A.
Publication year - 1970
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19700410219
Subject(s) - magnetization , condensed matter physics , curie temperature , nickel , magnetometer , curie–weiss law , magnetic field , crystallite , materials science , spheres , physics , nuclear magnetic resonance , ferromagnetism , metallurgy , quantum mechanics , astronomy
Static magnetization of polycrystalline nickel spheres (diameter about 0.3 cm) has been studied in detail as a function of the magnetic field above and below the Curie point, T c , using a vibrating sample magnetometer. Above T c the initial magnetic susceptibility is proportional to ϵ −γ , where ϵ = ∣1 − ( T/T c )∣ and γ = 1.33 ± 0.01, T being the absolute temperature. The spontaneous magnetization, determined by the kink method, is proportional to ϵ β , where β = 0.50 ± 0.02 for ϵ < 5 × 10 −3 and β = 0.34 ± 0.02 for ϵ > 5 × 10 −3 . The magnetization at T c is proportional to H i 1/18 , where H i is the internal magnetic field and δ = 4.17 ± 0.05. These results are compared with the power values obtained by other investigators and are discussed from the viewpoint of various theoretical models.