Magnetic and magnetocaloric properties of layered van der Waals CrCl3

Abstract

We have investigated the magnetic and magnetocaloric properties of van der Waals (vdW) layered CrCl3 from magnetization and heat capacity measurements. CrCl3 exhibits complicated magnetic properties due to the strong competition between the ferromagnetic and antiferromagnetic interactions: a ferromagnetic ordering around 17 K followed by an antiferromagnetic ordering at 14.3 K. A large magnetic entropy change (−ΔSM) of 19 J kg−1 K−1, an adiabatic temperature change (ΔTad) of 6.2 K, and a relative cooling power of 600 J kg−1 are observed for a field change of 7 T near the transition temperature, and the mechanical efficiency (ηm) at 18 K and 0–3 T is 1.17. These values of magnetocaloric parameters are significantly larger than those for CrI3 and other layered vdW systems. The scaling analysis shows that all the rescaled ΔSM(T, H) data collapse into a single curve, which indicates the second order nature of magnetic phase transition. The above results suggest that environmentally friendly CrCl3 can be a phenomenal alternative to very expensive rare-earth material for the magnetic refrigeration for liquefaction of hydrogen.

Magnetoelastic Coupling and Cryogenic Magnetocaloric Effect in Two-Site Disordered GdSrCoFeO6 Double Perovskite

“…On the other hand, for discrete magnetization measurements, Δ S M can be approximately calculated as: normalΔ S normalM ( T , H 0 ) = prefix∑ i M i + 1 − M i T i + 1 − T i normalΔ H i where M i and M i + 1 are the experimental data obtained at temperatures T i and T i + 1 , under a magnetic field H i , respectively. , The results of −Δ S M ( T ) curves for GdSrCoFeO 6 sample under several typical Δ H up to 7 T are illustrated in Figure a. All curves show positive values in the entire measured temperature range; they rise progressively with decreasing temperature and increase gradually with increasing Δ H , in agreement with the usual MCE behavior.…”

High-pressure synthesis, spin-glass behaviour, and magnetocaloric effects in FexTi2S4 heideite sulphides

“…However, for magnetization measurements with a small discrete field and temperature intervals, Δ S M can be approximately calculated as:where, M i and M i +1 are the experimental data obtained at temperatures T i and T i +1 , under a magnetic field H i , respectively. 49 Then, using the data of Fig. 6, the temperature dependence of Δ S M under different magnetic fields is shown in Fig.…”

“…(3) where, M i and M i+1 are the experimental data obtained at temperatures T i and T i+1 , under a magnetic field H i , respectively 49 . Then, using the data of Fig.…”

“…where, M i and M i+1 are the experimental data obtained at temperatures T i and T i+1 , under a magnetic field H i , respectively. 49 Then, using the data of Fig. 6, the temperature dependence of DS M under different magnetic fields is shown in Fig.…”

Segmented Highly Reversible Thermochromic Layered Perovskite [(CH2)2(NH3)2]CuCl4 Crystal Coupled with an Inverse Magnetocaloric Effect

“…The M 2 versus H / M plots, also called a Arrott plots, converted from the measured M – H isotherms are shown in Figure a. If the Arrot plot has a positive slope, the magnetic transition is second order; otherwise, a negative slope advocates the transition to be first order.…”