Summary
The magnetic properties, magnetic entropy change and hysteresis loss in La(Fe,Si,M)13 (M=Cu, Ga) compounds were investigated. It was found that the LaFe(11.7)[Si(1-x)Cu(x)]1.3 and LaFe(11.5)[Si(1-y)Ga(y)]1.5 compounds retain the cubic NaZn(13) structure when the substitution of Cu for Si or Ga for Si reaches 20 and 15%, respectively. With increasing Cu or Ga content, Curie temperature TC increases, metamagnetic behaviour becomes weaker and magnetic entropy change drops. However, magnetic entropy change of LaFe(11.7)[Si(1-x)Cu(x)]1.3 still remains a large value, about 20 J/kg.K, when Cu content x reaches 0.2. An attractive feature is that both thermal and magnetic hysteresis can be remarkably reduced by introducing Cu or Ga. The maximum hysteresis loss at TC drops from 74.1 J/kg to zero when the substitution of Cu for Si increases from 0 to 20%.
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Details
- Original title: Magnetic entropy change and hysteresis effect in La(Fe,Si,M)13 (M= Cu, Ga) systems.
- Record ID : 2009-1604
- Languages: English
- Source: 3rd International Conference on Magnetic Refrigeration at Room Temperature
- Publication date: 2009/05/11
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Indexing
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Themes:
Refrigerant circulation: piping, control, automation, safety;
Caloric cooling (magnetocaloric, electrocaloric, elastocaloric and barocaloric cooling);
Other refrigerating systems (desiccant cooling, thermoelectrics, thermoacoustics…) - Keywords: Copper; Magnetic refrigerator; Lanthanum; Temperature; Alloy; Silicon; Magnetic property; Material; Gallium; Iron; Curie; Additive
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- Date : 2005/09/27
- Languages : English
- Source: 1st International Conference on Magnetic Refrigeration at Room Temperature
- Formats : PDF
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- Date : 2009/05/11
- Languages : English
- Source: 3rd International Conference on Magnetic Refrigeration at Room Temperature
- Formats : PDF
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- Source: 5th International Conference on Magnetic Refrigeration at Room Temperature (Thermag V). Proceedings: Grenoble, France, September 17-20, 2012.
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- Languages : English
- Source: 3rd International Conference on Magnetic Refrigeration at Room Temperature
- Formats : PDF
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- Date : 2009/05/11
- Languages : English
- Source: 3rd International Conference on Magnetic Refrigeration at Room Temperature
- Formats : PDF
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