TY - JOUR
T1 - 3d-4f spin interaction induced giant magnetocaloric effect in zircon-type DyCrO4 and HoCrO4 compounds
AU - Midya, A.
AU - Khan, N.
AU - Bhoi, D.
AU - Mandal, P.
PY - 2013/8/26
Y1 - 2013/8/26
N2 - We have investigated the influence of 3d-4f spin interaction on magnetic and magnetocaloric properties of DyCrO4 and HoCrO4 compounds by magnetization and heat capacity measurements. Both the compounds exhibit complicated magnetic properties and huge magnetic entropy change around the ferromagnetic transition due to the strong competition between ferromagnetic and antiferromagnetic superexchange interactions. For a field change of 8 T, the maximum values of magnetic entropy change (Δ S M m a x), adiabatic temperature change (Δ T a d), and refrigerant capacity (RC) reach 29 J kg-1 K-1, 8 K, and 583 J kg-1, respectively, for DyCrO4 whereas the corresponding values for HoCrO4 are 31 J kg-1 K-1, 12 K, and 622 J kg-1. Δ S M m a x, Δ T a d, and RC are also quite large for a moderate field change. The large values of magnetocaloric parameters suggest that the zircon-type DyCrO4 and HoCrO4 could be the potential magnetic refrigerant materials for liquefaction of hydrogen.
AB - We have investigated the influence of 3d-4f spin interaction on magnetic and magnetocaloric properties of DyCrO4 and HoCrO4 compounds by magnetization and heat capacity measurements. Both the compounds exhibit complicated magnetic properties and huge magnetic entropy change around the ferromagnetic transition due to the strong competition between ferromagnetic and antiferromagnetic superexchange interactions. For a field change of 8 T, the maximum values of magnetic entropy change (Δ S M m a x), adiabatic temperature change (Δ T a d), and refrigerant capacity (RC) reach 29 J kg-1 K-1, 8 K, and 583 J kg-1, respectively, for DyCrO4 whereas the corresponding values for HoCrO4 are 31 J kg-1 K-1, 12 K, and 622 J kg-1. Δ S M m a x, Δ T a d, and RC are also quite large for a moderate field change. The large values of magnetocaloric parameters suggest that the zircon-type DyCrO4 and HoCrO4 could be the potential magnetic refrigerant materials for liquefaction of hydrogen.
UR - https://www.scopus.com/pages/publications/84884180498
U2 - 10.1063/1.4819768
DO - 10.1063/1.4819768
M3 - Article
AN - SCOPUS:84884180498
SN - 0003-6951
VL - 103
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 9
M1 - 092402
ER -