- M?ssbauer Study of Ti0.9957Fe0.01O2
- ㆍ 저자명
- Kim. Eng-Chan,Moon. S.H.,Woo. S.I.,Kim. H.D.,Kim. B.Y.,Cho. J.H.,Joh. Y.G.,Kim. D.H.
- ㆍ 간행물명
- 韓國磁氣學會誌
- ㆍ 권/호정보
- 2005년|15권 2호|pp.106-108 (3 pages)
- ㆍ 발행정보
- 한국자기학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
The rutile polycrystal $Ti_{0.99};^{57}Fe_{0.01}O_2$ prepared with $^{57}Fe$ enriched iron have been studied by $Mddot{o}ssbauer$ spectroscopy, X-ray diffraction and VSM. The $Mddot{o}ssbauer$ spectrum of $Ti_{0.99};^{57}Fe_{0.01}O_2$ consists of a ferromagnetic and a paramagnetic phase over all temperature ranging from 4 to 300 K. Isomer shifts indicate $Fe^{2+}$ for the ferromagnetic phase, but $Fe^{3+}$ for the paramagneic phase of $Ti_{0.99};^{57}Fe_{0.01}O_2$ sample. It is noted that the magnetic hyperfine field of ferromagnetic phase had the value about 1.48 times as large as that of $alpha$-Fe. The XRD data for $Ti_{0.99};^{57}Fe_{0.01}O_2$ showed a pure rutile phase with tetragonal structures without any segregation of Fe into particulates within the instrumental resolution limit The magnetic hysteresis (M-H) curve at room temperature showed an obvious ferromagnetic behavior and the magnetic moment per Fe atom under the applied field of 1 T was estimated to be about $0.71{mu}_B$, suggesting a low spin configuration of Fe ions.