Neutron depolarization study of the magnetic phase transition in a disordered system

The ferromagnetic phase transition in the invar alloy Fe 70Ni 30 (0.7 at% C) with fully FCC structure was investigated by means of 3-D neutron depolarization analysis. The mean magnetic induction, magnetic anisotropy parameter and neutron depolarization were measured as a function of temperature and...

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Bibliographic Details
Published inPhysica. B, Condensed matter Vol. 267; pp. 84 - 87
Main Authors Grigoriev, S.V., Klimko, S.A., Kraan, W.H., Rekveldt, M.Th, Okorokov, A.I., Runov, V.V.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.06.1999
Subjects
Fluctuations of the Curie temperature
Neutron depolarization
Phase transition
Neutron depolarization
Fluctuations of the Curie temperature
Phase transition
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Summary:The ferromagnetic phase transition in the invar alloy Fe 70Ni 30 (0.7 at% C) with fully FCC structure was investigated by means of 3-D neutron depolarization analysis. The mean magnetic induction, magnetic anisotropy parameter and neutron depolarization were measured as a function of temperature and external magnetic field. Our experiments show the appearance of large magnetic inhomogeneities with size about 10 3–10 4 Å in the paramagnetic temperature range. The data were interpreted using the concept of a probability function ρ( T C) which describes the variations of the Curie temperatures over the system.
ISSN:0921-4526
1873-2135
DOI:10.1016/S0921-4526(99)00006-X