Giant low-field reversible magnetocaloric effect in HoCoGe compound. Issue 108 (8th November 2016)

• Record Type: Journal Article
• Authors: Zhang, Y.; Dong, Q. Y.; Wang, L. C.; Zhang, M.; Yan, H. T.; Sun, J. R.; Hu, F. X.; Shen, B. G.
• Is Part Of: RSC advances. Volume 6:Issue 108(2016)
• Page Start: 106171
• Page End: 106176
• Publication Date: 2016-11-08
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra24527g
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : HoCoGe compound shows large magnetic entropy change and adiabatic temperature change, which makes it an attractive candidate for magnetic refrigeration in the low temperature range. Abstract : Magnetic properties and magnetocaloric effects (MCEs) of the HoCoGe compound have been investigated by magnetization and heat capacity measurements. The HoCoGe compound undergoes a second-order ferromagnetic–paramagnetic phase transition around the Curie temperature T C = 7.6 K and exhibits a giant reversible MCE. For a field change of 0–5 T, the maximum values of magnetic entropy change (−Δ S M ) and adiabatic temperature change (Δ T ad ) are 23.9 J kg −1 K −1 and 10.9 K, respectively. A large refrigerant capacity of 402 J kg −1 is also observed. In particular, the maximum values of −Δ S M and Δ T ad are high, at 17.1 J kg −1 K −1 and 6.0 K respectively, for a field change of 0–2 T. These results show that the HoCoGe compound with excellent magnetocaloric effects can be expected to have effective applications in low temperature magnetic refrigeration.