Significant Inverse Magnetocaloric Effect induced by Quantum Criticality

Abstract

The criticality-enhanced magnetocaloric effect (MCE) near a field-induced quantum critical point (QCP) in the spin systems constitutes a very promising and highly tunable alternative to conventional adiabatic demagnetization refrigeration. Strong fluctuations in the low-$T$ quantum critical regime can give rise to a large thermal entropy change and thus significant cooling effect when approaching the QCP. In this work, through efficient and accurate many-body calculations, we show there exists a significant inverse MCE(iMCE) in the spin-1 quantum chain materials(CH${}_3$)${}_4$NNi(NO${}_2$)${}_3$ (TMNIN) and NiCl${}_2$-4SC(NH${}_2$)${}_2$ (DTN), where DTN has substantial low-$T$ refrigeration capacity while requiring only moderate magnetic fields. The iMCE characteristics, including the adiabatic temperature change $\Delta T_{\mathrm{ad}}$, isothermal entropy change $\Delta S$, differential Grüneisen parameter, and the entropy change rate, are obtained with quantum many-body calculations at finite temperature. The cooling performance, i.e., the efficiency factor and hold time, of the two compounds is also discussed. Based on the many-body calculations on realistic models for the spin-chain materials, we conclude that the compound DTN constitutes a very promising and highly efficient quantum magnetic coolant with pronounced iMCE properties. We advocate that such quantum magnets can be used in cryofree refrigeration for space applications and quantum computing environments.

arXiv comment10 pages,9 figures,1 table

References in corpus (19)

• Inverse magnetocaloric effect in ferromagnetic Ni-Mn-Sn alloys
• Tensor-Entanglement-Filtering Renormalization Approach and Symmetry Protected Topological Order
• Universally diverging Grueneisen parameter and the magnetocaloric effect close to quantum critical points
• Enhanced magnetocaloric effect in frustrated magnets
• Bose-Einstein Condensation of S = 1 Ni spin degrees of freedom in NiCl2-4SC(NH2)2
• Sign change of the Grueneisen parameter and magnetocaloric effect near quantum critical points
• Cooling and heating by adiabatic magnetization in the Ni${}_{50}$Mn${}_{34}$In${}_{16}$ magnetic shape memory alloy
• Magnetocaloric effect in one-dimensional antiferromagnets
• Magnetocaloric effect and magnetic cooling near a field-induced quantum-critical point
• Linearized Tensor Renormalization Group Algorithm for Thermodynamics of Quantum Lattice Models
• Quantum fluctuations and strong mass renormalization in NiCl2-4SC(NH2)2
• Grüneisen parameter studies on heavy fermion quantum criticality
• Low-Temperature Heat Transport in the Low-Dimensional Quantum Magnet NiCl_{2}-4SC(NH_{2})_{2}
• Magnetocaloric effect in quantum spin-s chains
• Spin thermal conductivity of the Haldane chain compound Y2BaNiO5
• Bilayer Linearized Tensor Renormalization Group Approach for Thermal Tensor Networks
• Magnetic properties of the Haldane-gap material NENB
• Magnetic excitations in the spin-1 anisotropic antiferromagnet $NiC{l}_2-4SC(N{H}_2{)}_2$
• Crystal growth and characterization of Haldane chain compound Ni(C${}_3$H${}_{10}$N${}_2$)${}_2$NO${}_2$ClO${}_4$

Cited by in corpus (1)

• Antiferromagnetic ordering and critical behavior induced giant magnetocaloric effect in distorted kagome lattice Gd${}_3$BWO${}_9$