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No.4(pp.111-156)

Home > Issues > Volume 2 (1997) > No.4(pp.111-156)

A Study of Co, Ni, Mn, and Al Containing Goethites by MÖssbauer Spectroscopy

Journal of Magnetics, Volume 2, Number 4, 31 Dec 1997, Pages 116-122

Eng-Chan kim(Department of Physics, Yeungnam University), Hyeun-Gook Hwang(Department of Physics, Yeungnam University), Yong-Soon Hwang(Department of Physics, Yeungnam University), Jung Gi Kim(Department of Physics, Hanyang University), V. I. Nikolaev(General Physics Department, Moscow State University)

Abstract

To determine whether there is an ionic substitution of Ni, Co, Mn, and Al for Fe in synthetic goethites these materials have been studied by MÖssbauer spectroscopy at various temperatures ranging from 77 to 400 K. It is found that the presence of substituting elements in magnetically ordered structure of crystals may change the shape of MÖssbauer spectra of these caterials. The approximate distribution function of the effective magnetic field in the Fe nucleus p(Hn) is obtained from the M ssbauer spectra. It is noted that the mean value of p(Hn) and its integral width can be taken as a measure of substitution in goethites.

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