	US 12,136,508 B2
	Iron-rhodium magnetocaloric alloy ribbons for high performance cooling-heating applications and process for manufacturing the same
Jose Luis Sanchez Llamazares, San Luis Potosi (MX); Cesar Fidel Sanchez Valdes, Chihuahua (MX); Maria de Lourdes Arreguin Hernandez, Guanajuato (MX); and Mauricio Lopez Cruz, San Luis Potosi (MX)
Assigned to Instituto Potosino de Investigación Científica y Tecnológica A.C., San Luis Potosí (MX); and Universidad Autonoma de Ciudad Juarez, Chiuhuahua (MX)
Filed by Instituto Potosino de Investigación Cientifica y Tecnológica A.C., San Luis Potosi (MX); and Universidad Autonoma de Ciudad Juarez, Chihuahua (MX)
Filed on Sep. 17, 2020, as Appl. No. 17/023,608.
Prior Publication US 2022/0084728 A1, Mar. 17, 2022
Int. Cl. H01F 1/01 (2006.01); C22C 5/04 (2006.01); H01F 41/02 (2006.01)

CPC H01F 1/015 (2013.01) [C22C 5/04 (2013.01); H01F 41/02 (2013.01)]

8 Claims

1. A magnetocaloric material comprising: a melt-spun ribbon made of a binary alloy of Fe_100-xRh_x, wherein x is in the interval 48≤x≤52 at. %;

wherein the ribbon is a polycrystalline ribbon made of micronic grains;

wherein the magnetocaloric material has a ribbon shape;

wherein the ribbon after thermal annealing shows;

for a AFM to FM magneto-elastic transition, a magnetic field induced magnetocaloric effect per magnetic field change |ΔS_M^peak|/μ_oΔH>22.8 Jkg-¹K⁻¹T⁻¹for μ_oΔH=0.5 T, a maximum adiabatic temperature change of 14.6 K and a refrigerant capacity RC-2 of 238 Jkg⁻¹K⁻¹for a magnetic field change μ_oΔH=2 T;

for a FM to AFM magneto-elastic transition, a magnetic field induced magnetocaloric effect per magnetic field change |ΔS_M^peak|/μ_oΔH>22.0 Jkg⁻¹K⁻¹T⁻¹for μ_oΔH=0.5 T, a maximum adiabatic temperature change of 13.1 K and a refrigerant capacity RC-2 of 231 Jkg⁻¹K⁻¹for a magnetic field change of μ₀ΔH=2T.