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학술지 Correlation of Ferromagnetism and Structure in Fe Observed by High Resolution X-Ray Diffraction
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저자
최정용, 이채봉, 김현탁
발행일
201206
출처
Journal of Magnetism and Magnetic Materials, v.324 no.22, pp.3674-3678
ISSN
0304-8853
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.jmmm.2012.05.035
협약과제
12ZF1100, Seed형 기술개발을 위한 창의형 연구사업, 박선희
초록
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.
키워드
Body-centered tetragonal structure, Exchange striction, Ferromagnetism, Magnetostriction, Pseudocubic
KSP 제안 키워드
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