Abstract
We have measured both real and imaginary part of magnetic susceptibility of EuS near the Curie temperature T c by means of the high frequency magnetic susceptibility measurement method, in which no demagnetization corrections have been required. Except for the immediate vicinity of T c , the critical relaxation spectra obtained are described by a Debye form of relaxation and the critical index of the relaxation time is determined to be Δ =1.26±0.03. The value of Δ is slightly smaller than that of the static susceptibility, γ=1.41±0.01. For temperatures closer to T c , the critical relaxation spectra become to exhibit a polydispersive character.
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