TY - JOUR
T1 - Effect of Dy, Ho, and Er substitution on the magnetocaloric properties of Gd-Co-Al-Y high entropy bulk metallic glasses
AU - Pang, C.M.
AU - Chen, L.
AU - Xu, H.
AU - Guo, W.
AU - Lv, Z.W.
AU - Huo, J.T.
AU - Cai, M.J.
AU - Shen, B.L.
AU - Wang, X.L.
AU - Yuan, C.C.
PY - 2020/6/25
Y1 - 2020/6/25
N2 - Glass-forming ability, thermal stability and magnetocaloric properties of Gd25Co25Al25Y25 and Gd25Co25Al25Y15RE10 (RE = Dy, Ho, and Er) high entropy metallic glasses are evaluated. With the substitution of Y by adjacent heavy rare earth elements, i.e., Dy, Ho, or Er, the critical dimension (Dc), the width of the supercooled liquid region, magnetic entropy changes (|ΔSM|) and refrigeration capacity (RC) increase obviously. However, the magnetic transition temperature (TC) almost keeps constant around 40 K, which may be attributed to the exchange interaction between Y and transition metal or other rare earth elements. Among resulting Gd25Co25Al25Y15RE10 metallic glasses, the peak values of |ΔSM| and RC can be improved from 6.76 to 7.35 Jkg−1K−1and 424 to 488 Jkg-1 when substituting Dy by Ho. This makes Gd25Co25Al25Y15Ho10 as an attractive candidate for magnetic refrigerants in hydrogen liquefaction temperature range.
AB - Glass-forming ability, thermal stability and magnetocaloric properties of Gd25Co25Al25Y25 and Gd25Co25Al25Y15RE10 (RE = Dy, Ho, and Er) high entropy metallic glasses are evaluated. With the substitution of Y by adjacent heavy rare earth elements, i.e., Dy, Ho, or Er, the critical dimension (Dc), the width of the supercooled liquid region, magnetic entropy changes (|ΔSM|) and refrigeration capacity (RC) increase obviously. However, the magnetic transition temperature (TC) almost keeps constant around 40 K, which may be attributed to the exchange interaction between Y and transition metal or other rare earth elements. Among resulting Gd25Co25Al25Y15RE10 metallic glasses, the peak values of |ΔSM| and RC can be improved from 6.76 to 7.35 Jkg−1K−1and 424 to 488 Jkg-1 when substituting Dy by Ho. This makes Gd25Co25Al25Y15Ho10 as an attractive candidate for magnetic refrigerants in hydrogen liquefaction temperature range.
KW - Glass-forming ability
KW - High-entropy alloys
KW - Magnetocaloric effect
KW - Metallic glasses
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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85079399553&origin=recordpage
U2 - 10.1016/j.jallcom.2020.154101
DO - 10.1016/j.jallcom.2020.154101
M3 - RGC 21 - Publication in refereed journal
SN - 0925-8388
VL - 827
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
M1 - 154101
ER -