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Effects of Ga Substitution in LaFe1-xGaxO3 (χ= 0, 0.1, 0.3, 0.5, and 0.7)
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  • Effects of Ga Substitution in LaFe1-xGaxO3 (χ= 0, 0.1, 0.3, 0.5, and 0.7)
저자명
Yoon. Sung-Hyun,Park. Seung-Jin,Cha. Deok-Joon,Min. Byung-Ki,Kim. Chul-Sung
간행물명
Journal of magnetics
권/호정보
2002년|7권 2호|pp.40-44 (5 pages)
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한국자기학회
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

Crystallographic and magnetic properties of ;$LaFe_{1-x}Ga_xO_3$($chi$= 0, 0.1, 0.3, 0.5, and 0.7) were studied using XRD and Mossbauer spectroscopy. The crystal structures were found to be orthorhombic and the lattice parameters $alpha$, b, and c were found to decrease with increasing Ga substitution. M$ddot{o}$ssbauer spectra were obtained at various absorber temperatures ranging from 20 K to 750 K. The M$ddot{o}$ssbauer spectra were all sextets below $T_N$ and were all singlets above $T_N$. Asymmetric broadening of the M$ddot{o}$ssbauer spectral lines at 20 K was explained by the multitude of possible environments for an iron nucleus. As the temperature increases to $T_N$, a systematic line broadening in M$ddot{o}$ssbauer spectra was observed and interpreted to originate from different temperature dependencies of the magnetic hyperfine fields at various iron sites.