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No.1(pp.1-41)

Home > Issues > Volume 6 (2001) > No.1(pp.1-41)

Magnetic Characteristics of Ancient Plain Coarse Pottery and Pantiles from Cheju Island

Journal of Magnetics, Volume 6, Number 1, 31 Mar 2001, Pages 5-8

Tae Gun Yoon(Department of Physics Cheju National University), Jeong Dae Ko(Department of Physics Cheju National University), Sung Rak Hong(Department of Physics Cheju National University)

Abstract

Cheju island is composed of volcanic tuff. The soil in Cheju island has principally sprung from basalt and partially made up of trachyte, and andesite. Also ancient relics, plain coarse pottery kilns and pantiles kilns are homogeneously distributed all over the Cheju island. In this study samples of plain coarse pottery and pantiles from five regions of Cheju island have been examined through X-ray fluorescence spectrometer and Mossbauer spectroscopy. It is thought that these samples be partially formed from neutral volcanic rock like trachyte and the valence state of iron is almost Fe³⁺. Also the magnetic hyperfine field of goethite contained in these samples is less than synthetic goethite. This result shows the degradation of magnetic order caused by the partial substitution of diamagnetic positive ion Fe³⁺ by Al³⁺ in he goethite lattice.

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