Synthesis, Structure and Magnetic Properties of Sm<sub>6−<i>x</i></sub>La<i><sub>x</sub></i>Mn<sub>23</sub> (0.5 ≤ <i>x</i> ≤ 4) Alloys
The structure and magnetic properties of Sm<sub>6−<i>x</i></sub>La<i><sub>x</sub></i>Mn<sub>23</sub> (<i>x</i> = 0.5, 1, 2, 3 and 4) alloys have been studied systematically. We found that the Th<sub>6</sub>Mn<sub&...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-05-01
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| Series: | Magnetochemistry |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2312-7481/11/5/45 |
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| Summary: | The structure and magnetic properties of Sm<sub>6−<i>x</i></sub>La<i><sub>x</sub></i>Mn<sub>23</sub> (<i>x</i> = 0.5, 1, 2, 3 and 4) alloys have been studied systematically. We found that the Th<sub>6</sub>Mn<sub>23</sub>-type Sm<sub>6−<i>x</i></sub>La<i><sub>x</sub></i>Mn<sub>23</sub> alloys become less stable with increasing La content, and α-Mn becomes the dominant phase at <i>x</i> = 4. More impurities were found to present in Sm<sub>5</sub>LaMn<sub>23</sub> samples prepared by a rapid solidification process than those present in the as-cast ingots. The coercivity of Sm<sub>4</sub>La<sub>2</sub>Mn<sub>23</sub> induction-melted ingots and Sm<sub>5</sub>LaMn<sub>23</sub> melt-spun ribbons reached up to 0.47 T and 0.53 T, respectively, indicating potential applications of this alloy in hard magnetic materials. The Curie temperature of Sm<sub>6−<i>x</i></sub>La<i><sub>x</sub></i>Mn<sub>23</sub> falls in the range of 398 K for <i>x</i> = 1 to 438 K for <i>x</i> = 3. The La-substitution results in a reduced saturation magnetization of Sm<sub>6−<i>x</i></sub>La<i><sub>x</sub></i>Mn<sub>23</sub>, owing to a reduced total-magnetic-moment contribution of the Sm-sublattices. This work provides us a deeper understanding of the effect of La-substitution on the structure and magnetic properties of the ternary La-Sm-Mn alloys. |
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| ISSN: | 2312-7481 |