Large Magnetocaloric Effect in the Kagome Ferromagnet Li9Cr3(P2O7)3

Spin reorientation in easy-plane kagome ferromagnet Li9Cr3(P2O7)3(PO4)2

“…3(b), we observe that at 1.8 K the saturation magnetization for B ab-plane and B c-axis is approximately 3.05 µ B and 3.11 µ B per Cr, respectively. Notably, the material reaches saturation faster when the magnetic field is parallel to the ab-plane, indicating that this material is an easy-plane ferromagnetic material, consistent with the findings reported by Akshata Magar et al [17] Figures 3(c) and 3(d) depict the temperature-dependent magnetization of Li 9 Cr 3 (P 2 O 7 ) 3 (PO 4 ) 2 with the magnetic field applied along different directions. These figures illustrate that Li 9 Cr 3 (P 2 O 7 ) 3 (PO 4 ) 2 undergoes a magnetic transition at around 2.7 K from the paramagnetic state to the ferromagnetic ordered state under a lower magnetic field (0.005 T) with the magnetic moment lying in the kagome plane.…”

“…Recently, we note that Akshata Magar's team had recently studied Li 9 Cr 3 (P 2 O 7 ) 3 (PO 4 ) 2 for its magnetocaloric effect and magnetic refrigeration applications. [17] The resulting single crystal samples Li 9 Cr 3 (P 2 O 7 ) 3 (PO 4 ) 2 had sizes between 1 mm and 2 mm and appeared dark green in color with a relatively regular hexagonal platelet morphology. We used the Rigaku Smartlab-9 diffractometer to obtain x-ray powder diffraction (XRPD) patterns at 300 K with a scanning step width of 0.01 • in the range of 5 • -90 • .…”

Cs2Fe2(MoO4)3─A Strongly Frustrated Magnet with Orbital Degrees of Freedom and Magnetocaloric Properties

“… 10 − 12 An attractive alternative posed is frustrated magnets, with their large number of low-lying energy states and inherent high magnetic entropy released over an extended temperature range, especially around 20 K—the boiling point of H 2 —and below. 13 − 15 From a materials perspective, a further challenge for implementing MC materials into cooling systems is to ensure isotropic heat transport. Thus, cubic crystal structures are preferred.…”

“…Their cooling efficiency and performance are often limited due to first-order phase transitions resulting in irreversible losses during thermal and magnetic cycling . Recent thrusts for enhancing cooling performance at cryogenic temperatures feature rare-earth element materials exhibiting magnetic second-order phase transitions. − An attractive alternative posed is frustrated magnets, with their large number of low-lying energy states and inherent high magnetic entropy released over an extended temperature range, especially around 20 Kthe boiling point of H 2 and below. − From a materials perspective, a further challenge for implementing MC materials into cooling systems is to ensure isotropic heat transport. Thus, cubic crystal structures are preferred.…”

Exploring dielectric phenomena in sulflower-like nanostructures via Monte Carlo technique

“…In recent research, investigations of the magnetic, magnetocaloric, and dielectric characteristics of diverse structures have been done via the Monte Carlo technique (MCt), including nano-islands [16], nanowires [17], Borophene Superlattices and core-shell [18,19], graphene-like nanoribbons [20], copper fluorides [21], a nano-graphene bilayer [22], a diluted graphdiyne monolayer with defects [23], a trilayer graphene-like structure [24], a polyhedral chain [25], the Kagome Ferromagnet [26]. Ising models have also been utilized to investigate the mixed systems, like the TbMnO 3 multiferroic system [27], the Gd 2 O 3 nanowire [28], the graphyne [29] and the core-shell Nanotube [30] systems and the Ising thin-film [31].…”