Magnetic structure of critical Fe-Ni alloys as derived from Arrott plots and Mössbauer spectra |
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| Authors: | J Weissman L Levin |
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| Institution: | Armament Development Authority, Dep. 23, P.O. Box 2250, 31021 Haifa, Israel;Technion, Israel Institute of Technology, Materials Eng. Dep., Haifa, Israel |
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| Abstract: | New evidence of magnetic phase transition brought about by an external magnetic field acting on critical composition bulk Fe-Ni alloys was found by using iron-nickel alloys containing 30 wt% Ni and 31.3 wt% Ni, respectively (balance Fe). The split in the central peak of Mössbauer spectrum of the Fe-Ni alloy containing 29.7 wt% Ni, at its Curie temperature in a weak external magnetic field of 3100 Oe, is a conclusive evidence of its superparamagnetic structure. |
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