%0 Journal Article %1 PhysRevApplied.18.054076 %A Magar, Akshata %A K, Somesh %A Singh, Vikram %A Abraham, J.J. %A Senyk, Y. %A Alfonsov, A. %A Büchner, B. %A Kataev, V. %A Tsirlin, A.A. %A Nath, R. %D 2022 %I American Physical Society %J Phys. Rev. Appl. %K b %N 5 %P 054076 %R 10.1103/PhysRevApplied.18.054076 %T Large magnetocaloric effect in the kagome ferromagnet Li$_9$Cr$_3$(P$_2$O$_7$)$_3$(PO$_4$)$_2$ %U https://link.aps.org/doi/10.1103/PhysRevApplied.18.054076 %V 18 %X Single-crystal growth, magnetic properties, and magnetocaloric effect of the S = 3/2 kagome ferromagnet Li9Cr3(P2O7)3(PO4)2 (trigonal, space group: P3c1) are reported. Magnetization data suggest dominant ferromagnetic intraplane coupling with a weak anisotropy and the onset of ferromagnetic ordering at TC ≃ 2.6 K. Microscopic analysis reveals a very small ratio of interlayer to intralayer ferromagnetic couplings (J⊥/J ≃ 0,02). Electron spin-resonance data suggest the presence of short-range correlations above Tc and confirms the quasi-two-dimensional character of the spin system. A large magnetocaloric effect characterized by isothermal entropy change of −ΔSm ≃ 31 J kg−1 K−1 and adiabatic temperature change of −ΔTad ≃ 9 K upon a field sweep of 7 T is observed around Tc. This leads to a large relative cooling power of RCP ≃ 284J kg−1. The large magnetocaloric effect, together with negligible hysteresis render Li9Cr3(P2O7)3(PO4)2 a promising material for magnetic refrigeration at low temperatures. The magnetocrystalline anisotropy constant K ≃ −7.42 × 104 erg cm−3 implies that the compound is an easyplane-type ferromagnet with the hard axis normal to the ab plane, consistent with the magnetization data

@article{PhysRevApplied.18.054076, abstract = {Single-crystal growth, magnetic properties, and magnetocaloric effect of the S = 3/2 kagome ferromagnet Li9Cr3(P2O7)3(PO4)2 (trigonal, space group: P3c1) are reported. Magnetization data suggest dominant ferromagnetic intraplane coupling with a weak anisotropy and the onset of ferromagnetic ordering at TC ≃ 2.6 K. Microscopic analysis reveals a very small ratio of interlayer to intralayer ferromagnetic couplings (J⊥/J ≃ 0,02). Electron spin-resonance data suggest the presence of short-range correlations above Tc and confirms the quasi-two-dimensional character of the spin system. A large magnetocaloric effect characterized by isothermal entropy change of −ΔSm ≃ 31 J kg−1 K−1 and adiabatic temperature change of −ΔTad ≃ 9 K upon a field sweep of 7 T is observed around Tc. This leads to a large relative cooling power of RCP ≃ 284J kg−1. The large magnetocaloric effect, together with negligible hysteresis render Li9Cr3(P2O7)3(PO4)2 a promising material for magnetic refrigeration at low temperatures. The magnetocrystalline anisotropy constant K ≃ −7.42 × 104 erg cm−3 implies that the compound is an easyplane-type ferromagnet with the hard axis normal to the ab plane, consistent with the magnetization data}, added-at = {2023-05-17T14:36:04.000+0200}, author = {Magar, Akshata and K, Somesh and Singh, Vikram and Abraham, J.J. and Senyk, Y. and Alfonsov, A. and Büchner, B. and Kataev, V. and Tsirlin, A.A. and Nath, R.}, biburl = {https://www.bibsonomy.org/bibtex/2141cb0730b183c111a99e4ee7b623f50/ctqmat}, day = 23, description = {Large magnetocaloric effect in the kagome ferromagnet Li9Cr3(P2O7)3(PO4)2}, doi = {10.1103/PhysRevApplied.18.054076}, interhash = {2fca180ee1a4370f0b7bce0884274f2a}, intrahash = {141cb0730b183c111a99e4ee7b623f50}, journal = {Phys. Rev. Appl.}, keywords = {b}, month = {11}, number = 5, numpages = {13}, pages = 054076, publisher = {American Physical Society}, timestamp = {2023-10-18T13:26:56.000+0200}, title = {Large magnetocaloric effect in the kagome ferromagnet Li$_{\mathbf{9}}$Cr$_{\mathbf{3}}$(P$_{\mathbf{2}}$O$_{\mathbf{7}}$)$_{\mathbf{3}}$(PO$_{\mathbf{4}}$)$_{\mathbf{2}}$}, url = {https://link.aps.org/doi/10.1103/PhysRevApplied.18.054076}, volume = 18, year = 2022 }