Magnetic properties of gas-phase prepared R<sub>2</sub>Fe<sub>15</sub>Si<sub>2</sub>C<sub>x</sub> (R=Sm and Er) compounds
Z W Li; X Z Zhou; A H Morrish; Z W Li; Dept. of Phys., Manitoba Univ., Winnipeg, Man., Canada; X Z Zhou; Dept. of Phys., Manitoba Univ., Winnipeg, Man., Canada; A H Morrish; Dept. of Phys., Manitoba Univ., Winnipeg, Man., Canada
Журнал:
Journal of Physics: Condensed Matter
Дата:
1994-05-16
Аннотация:
We have discovered that Si is able to stabilize the structure of the 2:17-type carbides. The carbides, R<sub>2</sub>Fe<sub>15</sub>Si<sub>2</sub>C<sub>x</sub> (R=Sm and Er), were made by heating powders of R<sub>2</sub>Fe<sub>15</sub>Si<sub>2</sub> in CH<sub>4</sub> at 700 degrees C. For Sm<sub>2</sub>Fe<sub>15</sub>Si<sub>2</sub>C<sub>2.3</sub>, the Curie temperature is 630 K and the anisotropy field is estimated to be over 70 kOe at room temperature; however, the saturation magnetization is relatively low, only about 88 emu g<sup>-1</sup>, also at room temperature.
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