Large magnetocaloric effect in the kagome ferromagnet Li${}_9$Cr${}_3$(P${}_2$O${}_7$)${}_3$(PO${}_4$)${}_2$

Abstract

Single-crystal growth, magnetic properties, and magnetocaloric effect of the $S=3/2$ kagome ferromagnet Li${}_9$Cr${}_3$(P${}_2$O${}_7$)${}_3$(PO${}_4$)${}_2$ (trigonal, space group: $P\bar{3}c1$) are reported. Magnetization data suggest dominant ferromagnetic intra-plane coupling with a weak anisotropy and the onset of ferromagnetic ordering at $T_{\mathrm{C}}\simeq 2.6$ K. Microscopic analysis reveals a very small ratio of interlayer to intralayer ferromagnetic couplings ($J_{\perp }/J\simeq 0.02$). Electron spin resonance data suggest the presence of short-range correlations above $T_{\mathrm{C}}$ and confirms quasi-two-dimensional character of the spin system. A large magnetocaloric effect characterized by isothermal entropy change of $-\Delta S_{\mathrm{m}}\simeq 31$ J kg${}^{-1}$ K${}^{-1}$ and adiabatic temperature change of $-\Delta T_{\mathrm{ad}}\simeq 9$ K upon a field sweep of 7 T is observed around $T_{\mathrm{C}}$. This leads to a large relative cooling power of $RCP\simeq 284$ J kg${}^{-1}$. The large magnetocaloric effect, together with negligible hysteresis render Li${}_9$Cr${}_3$(P${}_2$O${}_7$)${}_3$(PO${}_4$)${}_2$ a promising material for magnetic refrigeration at low temperatures. The magnetocrystalline anisotropy constant $K\simeq -7.42\times 10^4$ erg cm${}^{-3}$ implies that the compound is an easy-plane type ferromagnet with the hard axis normal to the $ab$-plane, consistent with the magnetization data.

arXiv comment13 pages, 14 figures

References in corpus (25)

• Fractionalized excitations in the spin liquid state of a kagomé lattice antiferromagnet
• Massive Dirac fermions in a ferromagnetic kagome metal
• The ALPS project release 1.3: open source software for strongly correlated systems
• Predicting the Spin-Lattice Order of Frustrated Systems from First-Principles
• Cluster algorithms for general-S quantum spin systems
• Effective Demagnetization Factors of Diamagnetic Samples of Various Shapes
• Machine Learning Guided Discovery of Gigantic Magnetocaloric Effect in HoB${}_2$ Near Hydrogen Liquefaction Temperature
• Giant magnetocaloric effect in Gd2NiMnO6 and Gd2CoMnO6 ferromagnetic insulators
• Large adiabatic temperature and magnetic entropy changes in EuTiO3
• Large anomalous Hall effect in the kagome ferromagnet LiMn${}_6$Sn${}_6$
• Magnetic anisotropy and spin-polarized two-dimensional electron gas in the van der Waals ferromagnet Cr${}_2$Ge${}_2$Te${}_6$
• Giant magnetocaloric effect in magnetically frustrated EuHo${}_2$O${}_4$ and EuDy${}_2$O${}_4$ compounds
• Haydeeite: a spin-1/2 kagome ferromagnet
• Critical behavior and magnetocaloric effect across the magnetic transition in Mn${}_{1+x}$Fe${}_{4-x}$Si${}_3$
• Giant magnetocaloric effect in exchange-frustrated GdCrTiO5 antiferromagnet
• Quantum Kagome Ice
• Anisotropic properties of the layered superconductor Cu0.07TiSe2
• Synthesis, Structure and Properties of Tetragonal Sr2M3As2O2 (M3 = Mn3, Mn2Cu and MnZn2) Compounds Containing Alternating CuO2-Type and FeAs-Type Layers
• Magnetic transitions in the topological magnon insulator Cu(1,3-bdc)
• Enhanced magnetocaloric effect and magnetic phase diagrams of single-crystal GdCrO${}_3$
• Quasi-one-dimensional magnetism in the spin-$\frac{1}{2}$ antiferromagnet BaNa${}_2$Cu(VO${}_4$)${}_2$
• Magnetic pyroxenes LiCrGe2O6 and LiCrSi2O6: dimensionality crossover in a non-frustrated S=3/2 Heisenberg model
• Classical Spin Liquid State in the $S=\frac{5}{2}$ Heisenberg Kagomé Antiferromagnet Li${}_9$Fe${}_3$(P${}_2$O${}_7$)${}_3$(PO${}_4$)${}_2$
• Unconventional superparamagnetic behavior in the modified cubic spinel compound LiNi${}_{0.5}$Mn${}_{1.5}$O${}_4$
• Negative thermal expansion and itinerant ferromagnetism in Mn${}_{1.4}$Fe${}_{3.6}$Si${}_3$

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