<sup>57</sup>Fe Mossbauer effect in the compound Er<sub>2</sub>Fe<sub>17</sub>C<sub>2.5</sub> prepared by melt spinning
Lin-shu Kong; Bao-gen Shen; Lei Cao; Hua-yang Gong; Yi-long Chen; Lin-shu Kong; State Key Lab. of Magnetism, Inst. of Phys., Chinese Acad. of Sci., Beijing, China; Bao-gen Shen; State Key Lab. of Magnetism, Inst. of Phys., Chinese Acad. of Sci., Beijing, China; Lei Cao; State Key Lab. of Magnetism, Inst. of Phys., Chinese Acad. of Sci., Beijing, China; Hua-yang Gong; State Key Lab. of Magnetism, Inst. of Phys., Chinese Acad. of Sci., Beijing, China; Yi-long Chen; State Key Lab. of Magnetism, Inst. of Phys., Chinese Acad. of Sci., Beijing, China
Журнал:
Journal of Physics: Condensed Matter
Дата:
1993-04-12
Аннотация:
The compound Er<sub>2</sub>Fe<sub>17</sub>C<sub>2.5</sub> formed by melt spinning has the rhombohedral Th<sub>2</sub>Zn<sub>17</sub>-type structure. The spin reorientation transition occurs at about 136 K. The <sup>57</sup>Fe Mossbauer effect was measured in the temperature range 12-300 K. From the acceptable fit the authors' find that the effective hyperfine fields of various sites decrease in the order 6c>18f>18h>9d. The anisotropy of the effective hyperfine field is observed to be different for different sites. The temperature dependence of the quadrupole splitting shows a large increase at around T<sub>sr</sub> with increasing temperature.
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