- M?ssbauer Study of Ti1-x-yCoxFeyO2
- ㆍ 저자명
- Kim. Eng-Chan,Lee. S.R.,Kim. T.H.,Ryu. Y.S.,Cho. J.H.,Joh. Y.G.,Kim. D.H.
- ㆍ 간행물명
- 韓國磁氣學會誌
- ㆍ 권/호정보
- 2006년|16권 1호|pp.11-13 (3 pages)
- ㆍ 발행정보
- 한국자기학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
[ $M"{o}ssbauer$ ] spectra of $Ti_{1-x-y}Co_xFe_yO_2(0.01{leq}x,;y{leq}0.05)$ prepared with $^{57}Fe$ enriched iron have been taken at various temperatures ranging from 80 to 300K. The Mossbauer spectrum of $Ti0.94Co_{0.03}Fe_{0.03}O_2$ consists of a ferromagnetic (six-Lorentzian), a paramagnetic phase (doublet) and armorphous phase over all temperature ranges. Isomer shifts indicate $Fe^{3+}$ for the ferromagnetic phase and the paramagneic phase of $Ti_{1-x-y}Co_xFe_yO_2$ samples. It is noted that the magnetic hyperfine field of ferromagnetic phase had the value about 1.5 times as large as that of u-fe. The XRB data for $Ti_{1-x-y}Co_xFe_yO_2$ showed mainly rutile phase with tetragonal structures without any segregation of Co and Fe into particulates within the instrumental resolution limit. The magnetic moment per (Co+Fe) atom in $Ti0.94Co_{0.03}Fe_{0.03}O_2$, under the applied field of 1T was estimated to be about $0.332{mu}_B$ which is ten times as large as that of $Ti0.97Co_{0.03}Fe_{0.03}O_2,;0.024{mu}_B$ per Co atom, suggesting a high spin configuration of Co and fe ions.