Excellent Glass Forming Ability and Refrigeration Capacity of a Gd₅₅Al₂₀Ni₁₂Co₁₀Mn₃ Bulk Metallic Glass

【摘要】 We investigate an excellent refrigeration capacity R_c of Gd₅₅Al₂₀Ni₁₂Co₁₀Mn₃ bulk metalic glass（BMG）.The Gd₅₅Al₂₀Ni₁₂Co₁₀Mn₃ glassy rod is subjected to Cu mold suction-casting to prepare bulky metallic glasses,with a diameter of 3 mm.The glass forming ability as well as the magnetic properties of the BMG is investigated.The BMG exhibits a rather high glass formation ability with critical diameter of about 5.6 mm.The peak value of magnetic entropy change of about 8J·kg^-1K^-1is obtained in this alloy.This BMG alloy also exhibits excellent magnetic refrigerant capacity of about 880 J·kg^₁under the field of 5T and 35%larger than that of other alloys reported previously,supposed to be closely related to the high effective moment（⁷.3μ_B）of the Gd₅₅Al₂₀Ni₁₂Co₁₀Mn₃ BMG.更多还原

【Abstract】 We investigate an excellent refrigeration capacity R_c of Gd₅₅Al₂₀Ni₁₂Co₁₀Mn₃ bulk metallic glass（BMG）.The Gd₅₅Al₂₀Ni₁₂Co₁₀Mn₃ glassy rod is subjected to Cu mold suction-casting to prepare bulky metallic glasses,with a diameter of 3 mm.The glass forming ability as well as the magnetic properties of the BMG is investigated.The BMG exhibits a rather high glass formation ability with critical diameter of about 5.6mm.The peak value of magnetic entropy change of about 8 J·kg^-1K^-1 is obtained in this alloy.This BMG alloy also exhibits excellent magnetic refrigerant capacity of about 880 J·kg^-1 under the Held of 5T and 35%larger than that of other alloys reported previously,supposed to be closely related to the high effective moment（⁷.3μ_B） of the Gd₅₅Al₂₀Ni₁₂Co₁₀Mn₃ BMG.更多还原