Relaxation of Thermoremanent Magnetization in Different Magnetic Phases Of Fe-rich $\mbox{$γ$}$-FeNiCr Alloys

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dc.creatorSinha, G.
dc.creatorChatterjee, R.
dc.creatorUehara, M.
dc.creatorMajumdar, A. K.
dc.date1995-08-25
dc.date.accessioned2026-07-07T03:07:52Z
dc.date.available2026-07-07T03:07:52Z
dc.descriptionThe time decay of the thermoremanent magnetization(TRM) of the $\mbox{Fe}_{80-\mbox{x}}\mbox{Ni}_{\mbox{x}}\mbox{Cr}_{20}$ ($14\leq \mbox{x} \leq 30$) alloys has been measured for four different magnetic phases within the fcc $\mbox{$γ$}$-phase using a SQUID magnetometer. In the spin-glass phase(SG)(X=19) very distinct ageing effects are observed where M(t) can be described as $M(t)=M_0(t/t_{w})^{-γ}\exp[-(t/τ)^{1-n}]$ for the entire time domain. In the reentrant spin-glass(RSG)(X= 23 and 26), M(t) can be better represented by the stretched exponential with an addition of a constant term which can be well explained by the Gabay-Toulouse(GT) model. We have also measured the linear and non-linear ac susceptibilities for the sample X=23 and confirmed the presence of the ferromagnetic(FM) ordering down to the lowest temperature. In the RSG(X=23), the TRM shows a minimum near T$_{\mbox{c}}$ and a local maximum just above T$_{\mbox{c}}$. In the FM phase (X=30) the popular prediction of the power law decay of the TRM is observed. The latter is indistinguishable from the stretched exponential in the antiferromagnetic(AF) phase (X=14).
dc.descriptionFigures available upon request
dc.identifierhttps://arxiv.org/abs/cond-mat/9508116
dc.identifierhttp://arxiv.org/abs/cond-mat/9508116
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/27334
dc.subjectCondensed Matter
dc.titleRelaxation of Thermoremanent Magnetization in Different Magnetic Phases Of Fe-rich $\mbox{$γ$}$-FeNiCr Alloys
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