Abstract
We have studied the magnetic properties of two amorphous alloy ribbons Fe72Cr6Si4Nb5B12Ag1 (FCSNB-Ag) and Fe72Cr6Si4Nb5B12Cu1 (FCSNB-Cu), prepared by using a melt-spinning technique. Magnetization (M) measurements for various temperatures (T) and magnetic fields (H) indicate that ferromagnetic-paramagnetic (FM-PM) phase transitions take place in FCSNB-Ag and FCSNB-Cu at Curie temperatures (T C ) of about 308.3 K and 322.5 K, respectively. Analyses of M - H data at different temperatures in the vicinity of the FM-PM phase transition based on the modified Arrott plot method and scaling hypothesis yielded the exponent values of β = 0.369± 0.005, γ = 1.359± 0.005 and δ = 4.7± 0.1 for FCSNB-Ag, and β = 0.376± 0.002, γ = 1.315 ± 0.006 and δ = 4.5± 0.1 for FCSNB-Cu. Compared with the values from theoretical models, these values are close to those expected for the 3D Heisenberg model, demonstrating the existence of short-range FM order in the amorphous alloy ribbons.
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Thanh, P.Q., Hoa, N.Q., Chau, N. et al. Short-range ferromagnetism in alloy ribbons of Fe-Cr-Si-Nb-(Ag, Cu). Journal of the Korean Physical Society 64, 1016–1021 (2014). https://doi.org/10.3938/jkps.64.1016
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DOI: https://doi.org/10.3938/jkps.64.1016