Magnetocaloric effect in ErNi2 melt-spun ribbons
来源期刊：JOURNAL OF RARE EARTHS2020年第6期
论文作者：P.Ibarra-Gaytán C.F.Sánchez-Valdés P.álvarez-Alonso
文章页码：612 - 616
摘 要：ErNi2 ribbons were produced by rapid solidification using the melt spinning technique.Their structural,magnetic and magnetocaloric properties in the as-solidified state were studied by X-ray diffraction,scanning electron microscopy,magnetization and specific heat measurements.Samples are single phase with the MgCu2-type crystal structure,a Curie temperature TC of 6.8 K and a saturation magnetization at2 K and 5 T of 124.0 A·m2/kg.For a magnetic field change μ0△H of 5 T（2 T） ribbons show a maximum magnetic entropy change |△SMpeak| of 24.1（16.9） J/（kg·K）,and an adiabatic temperature change △Tadmax of8.1（4.4） K;this is similar to the previously reported literature for bulk alloys that were processed through conventional melting techniques followed by prolonged thermal annealing.In addition,the samples also show slightly wider △SM（T） curves with respect to bulk alloys leading to a larger refrigerant capacity.
P.Ibarra-Gaytán1,2，C.F.Sánchez-Valdés3，P.álvarez-Alonso4
2. CPM-TIP,University Pavol Jozef Safárik3. División Multidisciplinaria,Ciudad Universitaria,Universidad Autónoma de Ciudad Juárez (UACJ)4. Departamento de Física,Universidad de Oviedo
摘 要：ErNi2 ribbons were produced by rapid solidification using the melt spinning technique.Their structural,magnetic and magnetocaloric properties in the as-solidified state were studied by X-ray diffraction,scanning electron microscopy,magnetization and specific heat measurements.Samples are single phase with the MgCu2-type crystal structure,a Curie temperature TC of 6.8 K and a saturation magnetization at2 K and 5 T of 124.0 A·m2/kg.For a magnetic field change μ0△H of 5 T（2 T） ribbons show a maximum magnetic entropy change |△SMpeak| of 24.1（16.9） J/（kg·K）,and an adiabatic temperature change △Tadmax of8.1（4.4） K;this is similar to the previously reported literature for bulk alloys that were processed through conventional melting techniques followed by prolonged thermal annealing.In addition,the samples also show slightly wider △SM（T） curves with respect to bulk alloys leading to a larger refrigerant capacity.
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