Magnetocaloric effect and critical behavior in Fe-La-Zr rapidly quenched ribbons
Fe90-xLaxZr10 (x ¼ 1 and 2) rapidly quenched ribbons with thickness of about 15 mm were prepared by the melt-spinning method. X-ray diffraction analysis shows that the structure of the ribbons is mostly amorphous. The Curie temperature, TC, of the alloy considerably increased, from ~262 K for x ¼...
Saved in:
Main Authors: | , , , , , , , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
H. : ĐHQGHN
2019
|
Subjects: | |
Online Access: | http://repository.vnu.edu.vn/handle/VNU_123/67305 https://doi.org/10.1016/j.jsamd.2018.11.002 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Institution: | Vietnam National University, Hanoi |
Language: | English |
Summary: | Fe90-xLaxZr10 (x ¼ 1 and 2) rapidly quenched ribbons with thickness of about 15 mm were prepared by the
melt-spinning method. X-ray diffraction analysis shows that the structure of the ribbons is mostly
amorphous. The Curie temperature, TC, of the alloy considerably increased, from ~262 K for x ¼ 1 to
~302 K for x ¼ 2, with increasing La-concentration. The maximum magnetic entropy change, jDSmjmax, of
the alloy is about 1.1 J∙kg1K1 for a magnetic field change DH ¼ 12 kOe. A quite large refrigerant capacity (RC ~ 74 J∙kg1 for DH ¼ 12 kOe) near the room temperature region is obtained for the alloy. A
thorough analysis on critical exponents around the ferromagnetic-paramagnetic phase transition, using
the ArrotteNoakes plots and KouveleFisher method, sheds light on the critical magnetic behavior and its
association with the magnetocaloric effect in the Fe-La based alloys. |
---|