TY - JOUR
T1 - Effect of heat treatment conditions on MnFe(P,Si,B) compounds for room-temperature magnetic refrigeration
AU - Nguyên, V.T.
AU - Yibole, H.
AU - van Dijk, N. H.
AU - Brück, E.
PY - 2017
Y1 - 2017
N2 - Mn1.000Fe0.950P0.595Si0.330B0.075compounds have been synthesized by high-energy ball milling and a subsequent solid-state reaction. The influence of the sintering conditions on the magnetic phase transition of Mn1.00Fe0.95P0.595Si0.33B0.075samples has been systematically investigated using X-ray diffraction and magnetic measurements. The experimental results show that all the samples obtained after different heat treatment conditions crystallize in the Fe2P-type hexagonal structure. The annealing temperature has a strong influence on the Curie temperature, which can be tuned between 265 and 298 K by sintering the samples at different temperatures between 1273 and 1373 K. The annealing time, however, does not significantly affect the Curie temperature. Both the annealing temperature and the annealing time have a significant effect on the magnetic entropy change. The magnetic entropy change under a magnetic field change of 1 T increases from 2.7 to 6.5 J kg−1K−1by increasing the annealing temperature from 1273 to 1373 K. By increasing the annealing time, the magnetic entropy change at first increases and then saturates after 20 h of heat treatment at 1373 K.
AB - Mn1.000Fe0.950P0.595Si0.330B0.075compounds have been synthesized by high-energy ball milling and a subsequent solid-state reaction. The influence of the sintering conditions on the magnetic phase transition of Mn1.00Fe0.95P0.595Si0.33B0.075samples has been systematically investigated using X-ray diffraction and magnetic measurements. The experimental results show that all the samples obtained after different heat treatment conditions crystallize in the Fe2P-type hexagonal structure. The annealing temperature has a strong influence on the Curie temperature, which can be tuned between 265 and 298 K by sintering the samples at different temperatures between 1273 and 1373 K. The annealing time, however, does not significantly affect the Curie temperature. Both the annealing temperature and the annealing time have a significant effect on the magnetic entropy change. The magnetic entropy change under a magnetic field change of 1 T increases from 2.7 to 6.5 J kg−1K−1by increasing the annealing temperature from 1273 to 1373 K. By increasing the annealing time, the magnetic entropy change at first increases and then saturates after 20 h of heat treatment at 1373 K.
KW - Annealing temperature
KW - Annealing time
KW - FeP
KW - Heat treatment
KW - Magnetic refrigeration
KW - Magnetocaloric effect
UR - http://www.scopus.com/inward/record.url?scp=85009092340&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2016.12.402
DO - 10.1016/j.jallcom.2016.12.402
M3 - Article
AN - SCOPUS:85009092340
SN - 0925-8388
VL - 699
SP - 633
EP - 637
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -