TY - JOUR
T1 - Magnetic properties and magnetic entropy change of LaFe11.5Si1.5 and melt-spun La1-xNdxFe11.5Si1.5 compounds
AU - Lu, Weipeng
AU - Xie, Kun
AU - Yang, Sen
AU - Song, Xiaoping
PY - 2006/1
Y1 - 2006/1
N2 - The structure and magnetic properties of annealed (950°C, 100 h) LaFe11.5Si1.5 ingots and annealed (1000°C, 5 h) melt-spun La1-xNdxFe11.5Si1.5 (x=0, 0.3, 0.5) ribbons were investigated by means of X-ray diffraction (XRD) and vibrating sample magnetometer (VSM). All ribbons are in the NaZn13-type structure and no 1:13 phase is observed in ingots though their annealing time is longer than that of ribbons, which suggests that the NaZn13-type compounds with large magnetic entropy change (|ΔS|) can be produced by melt spinning. Therefore, the production cost will be cut significantly because of short annealing time. Curie temperature (Tc) is slightly improved and the effective refrigeration temperature range is slightly broadened with the Nd content increasing in La1-xNdxFe11.5Si1.5 (x=0, 0.3, 0.5) ribbons. In summary, La1-xNdxFe11.5Si1.5 ribbons with x=0.3 have the best refrigeration efficiency and they are promising to become low-cost, high efficiency magnetism refrigeration materials near room temperature.
AB - The structure and magnetic properties of annealed (950°C, 100 h) LaFe11.5Si1.5 ingots and annealed (1000°C, 5 h) melt-spun La1-xNdxFe11.5Si1.5 (x=0, 0.3, 0.5) ribbons were investigated by means of X-ray diffraction (XRD) and vibrating sample magnetometer (VSM). All ribbons are in the NaZn13-type structure and no 1:13 phase is observed in ingots though their annealing time is longer than that of ribbons, which suggests that the NaZn13-type compounds with large magnetic entropy change (|ΔS|) can be produced by melt spinning. Therefore, the production cost will be cut significantly because of short annealing time. Curie temperature (Tc) is slightly improved and the effective refrigeration temperature range is slightly broadened with the Nd content increasing in La1-xNdxFe11.5Si1.5 (x=0, 0.3, 0.5) ribbons. In summary, La1-xNdxFe11.5Si1.5 ribbons with x=0.3 have the best refrigeration efficiency and they are promising to become low-cost, high efficiency magnetism refrigeration materials near room temperature.
KW - LaNd FeSi ribbons
KW - Magnetic entropy changes
KW - Magnetism. refrigeration
KW - Melt-spun
UR - https://www.scopus.com/pages/publications/33644649599
M3 - 文章
AN - SCOPUS:33644649599
SN - 1002-185X
VL - 35
SP - 82
EP - 84
JO - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
JF - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
IS - 1
ER -