Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 1992, Vol. 3 ›› Issue (2): 131

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Chen Xinshu (陈新树) and Han Zhiquan (韩志全)   

  1. Southwest Institute of Applied Magnetics, Mianyang 621000, China
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Chen Xinshu (陈新树) and Han Zhiquan (韩志全). ORIGIN OF MAGNETISM STUDY ON SOME COMMERCIAL Fe2O3.Nuclear Science and Techniques, 1992, 3(2): 131

Abstract: Six kinds of typical commercial Fe2O3 were sampled and divided into two groups A and B.according to the magnetic measurement results. The samples of group A are of susceptibility about 10° and the specific saturation magnetization σs 0.2-0.3 A.M2/kg, being consistent with the feature of antiferromagnetic α - Fe2O3 . While the samples of group B display strong magnetism with susceptibility 10-1-10-2 and o, 1.7-12 A.M2[kg. Mössbauer spectra of the samples were investigated at room temperature in an external magnetic field. It is suggested there is the γ- Fe2O3  phase in the group B according to the relative intensities of spectra I(2,5)//(3,4). This was proved by the Mössbauer spectra for the mixed samples A with γ- Fe2O3  at various contents and by measuring the dependence of specific saturation magnetization on temperature for the samples of group B.

Key words: M?ssbauer spectroscopy, Fe2O3, Origin of magnetism