A Mossbauer Study of the Internal Field at Fe^<57> in α-Fe_2O_3

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概要

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• Mossbauer absorption by Fe^<57> in α-Fe_2O_3 has been measured as a function of temperature from 100°K to 1050°K. In the hyperfine spectra, a steep change of the energy shift ε due to quadrupole interaction was found at about 26°K. The ratio of ε at 100°K to that at 300°K is -2.0±0.4. This value corresponds to the ratio of (3 cos^2θ-1) below and above the transition temperature, if we assume that the direction of the principal axis of the electric field gradient at the iron nucleus is parallel to the c axis. A careful observation of the shape of the absorption line near the transition temperature showed that each line consisted of doublet respectively. This fact reveals that the transition temperature of α-Fe_2O_3 used in the present experiment varies locally from 220°K to 270°K.

• 社団法人日本物理学会の論文
• 1962-06-05

著者

• Ono Kazuo

  Institute For Solid State Physics The University Of Tokyo

• Ono Kazuo

  Institute For Solid State Physics Univ. Of Tokyo

• Ito Atsuko

  Institute For Solid State Physics Univ. Of Tokyo

• ONO K.

  Institute of Science and Technology, University of Tokyo

• Ono K.

  Institute for Solid State Physics, University of Tokyo

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