Distributions of the hyperfine interaction parameters in (Erb>1−xb>Smb>xb>)b>2b>Feb>14b>B as seen by Mössbauer spectroscopy

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• 作者：Bara ; J.J. ; Bogacz ; B.F. ; Pedziwiatr ; A.T.
• 关键词：M&ouml ; ssbauer effect ; Hyperfine interactions in (Erb>1&minus ; xb>Smb>xb>)b>2b>Feb>14b>B ; Field distributions in (Erb>1&minus ; xb>Smb>xb>)b>2b>Feb>14b>B
• 刊名：Journal of Alloys and Compounds
• 出版年：2000
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：July 14, 2000
• 卷：307
• 期：1-2
• 页码：17-24
• 文件大小：416 K

摘要

The distributions of the hyperfine interaction parameters, caused by substitution of Sm for Er in the (Erb>1−xb>Smb>xb>)b>2b>Feb>14b>B system, were studied by Mössbauer spectroscopy both at room and liquid nitrogen temperatures. It was proved that the random distribution of the rare earth atoms over their crystal sites and the additive contribution of the Sm atoms to the values of the hyperfine interaction parameters at the iron crystal sites lead to a linear dependence of the average values of the ⁵⁷Fe hyperfine magnetic field, isomer shift and quadrupole interaction on the Sm concentration in the present compounds. From these linear relations, the contributions Δb>Hb>, Δb>ISb> and Δb>QSb> to the values of the hyperfine magnetic field, isomer shift and quadrupole interaction, caused by the presence of the Sm atom in the nearest neighbour shell of the Fe crystal sites, were derived. No distinct correlations were found between the Δb>Hb>, Δb>ISb> and Δb>QSb> values and those of the nearest neighbours and/or their distances from the Fe crystal sites.