Anisotropic magnetocaloric effect and critical behavior in CrCl${}_3$

Abstract

We report anisotropic magnetocaloric effect and magnetic critical behavior in van der Waals crystal CrCl${}_3$. The maximum magnetic entropy change $-\Delta S_M^{max}\sim 14.6$ J kg${}^{-1}$ K${}^{-1}$ and the relative cooling power $RCP\sim 340.3$ J kg${}^{-1}$ near $T_c$ with a magnetic field change of 5 T are much larger when compared to CrI${}_3$ or CrBr${}_3$. The rescaled $\Delta S_M(T,H)$ curves collapse onto a universal curve, confirming the second order ferromagnetic transition. Further critical behavior analysis around $T_c$ presents a set of critical exponents $\beta$ = 0.28(1) with $T_c$ = 19.4(2) K, $\gamma$ = 0.89(1) with $T_c$ = 18.95(8) K, and $\delta$ = 4.6(1) at $T_c$ = 19 K, which are close to those of theoretical tricritical mean field model.

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• Role of stacking defects on the magnetic behavior of CrCl${}_3$
• Electrically tunable room-temperature ferromagnetism in CrBr${}_3$
• Probing GHz Spin Dynamics Across Magnetic Phase Transitions in CrCl3 Nanoflakes Using Nitrogen-Vacancy Microscopy