Anisotropic magnetocaloric effect and critical behavior in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow><mml:mi>CrCl</mml:mi></mml:mrow><mml:mn>3</mml:mn></mml:msub></mml:math>
Yu Liu, C. Petrović
Abstract
We report anisotropic magnetocaloric effect and magnetic critical behavior in the van der Waals crystal ${\mathrm{CrCl}}_{3}$. The maximum magnetic entropy change $\ensuremath{-}\mathrm{\ensuremath{\Delta}}{S}_{M}^{\mathrm{max}}\ensuremath{\sim}14.6$ J ${\mathrm{kg}}^{\ensuremath{-}1}\phantom{\rule{0.16em}{0ex}}{\mathrm{K}}^{\ensuremath{-}1}$ and the relative cooling power $\text{RCP}\ensuremath{\sim}340.3$ J ${\mathrm{kg}}^{\ensuremath{-}1}$ near ${T}_{c}$ with a magnetic field change of 5 T are much larger when compared to ${\mathrm{CrI}}_{3}$ or ${\mathrm{CrBr}}_{3}$. The rescaled $\mathrm{\ensuremath{\Delta}}{S}_{M}(T,H)$ 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 $\ensuremath{\beta}=0.28(1)$ with ${T}_{c}=19.4(2)\phantom{\rule{4pt}{0ex}}\mathrm{K}$, $\ensuremath{\gamma}=0.89(1)$ with ${T}_{c}=18.95(8)\phantom{\rule{4pt}{0ex}}\mathrm{K}$, and $\ensuremath{\delta}=4.6(1)$ at ${T}_{c}=19\phantom{\rule{4pt}{0ex}}\mathrm{K}$, which are close to those of the theoretical tricritical mean-field model.