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Correlation of Ferromagnetism and Structure in Fe Observed by High Resolution X-Ray Diffraction
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- Authors
- Jeongyong Choi, Chai-Bong Lee, Hyun-Tak Kim
- Issue Date
- 2012-06
- Citation
- Journal of Magnetism and Magnetic Materials, v.324, no.22, pp.3674-3678
- ISSN
- 0304-8853
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Abstract
- In order to find evidence of the ferromagnetic interaction, the crystal structure and the magnetic property of pure Fe are investigated from room temperature to 950 °C by measuring X-ray diffraction patterns and magnetizations. The ferro-paramagnetic transition occurs near 770 °C with large stretch and contraction of lattice constants, which is an evidence of correlation of ferromagnetism and crystal structure. The structural phase transition between 慣-bcc and 款-fcc is observed above 850 °C. The d-spaces between (011) and (101) planes, observed with a high resolution triple-axis X-ray diffractometer, differ at RT; ?봡?돘d 101-d 011≈0.45%. The structure of Fe is pseudocubic, showing a body-centered tetragonal structure of c/a<1 generated by magnetostriction (exchange striction) induced by spontaneous magnetization. © 2012 Elsevier B.V.
- KSP Keywords
- Ferro-paramagnetic transition, Ferromagnetic interaction, High-resolution X-ray diffraction, Lattice constants, Pure Fe, Room-temperature, Spontaneous magnetization, Tetragonal structure, Triple-axis, X-ray diffraction pattern, crystal structure