Magnon thermal conductivity
Web1 jul. 2024 · No thermal conductivity activation of the current carriers for poorer gadolinium samples was observed. ... Usually, a low value of the power factor suggests rather the hopping transport, magnon scattering, and lower covalence of the studied materials compared to classical thermoelectric semiconductors . Web27 feb. 2013 · The ferromagnetic magnon specific heat Cm shows a characteristic T1.5-dependence down to 0.77 K. Below 0.77 K, a downward deviation is observed, which is attributed to the magnetic dipole-dipole interaction with typical magnitude of . The ferromagnetic magnon thermal conductivity does not show the characteristic T2 …
Magnon thermal conductivity
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Web1 mei 2004 · In order to enhance the thermal conductivity due to magnons, κ magnon, in the two-leg spin-ladder system (Ca,Sr,La) 14 Cu 24 O 41, we have grown the single crystals using raw materials with high purity and tried to improve the quality of the single crystals through the annealing in O 2 atmosphere. A large enhancement of κ magnon has been … Web27 feb. 2013 · The contribution of optically generated magnon to thermal conductivity and group velocity of ferromagnetic dilute semiconductors(i.e, Ga (1−x) M n x As) was determined in this study.
Web14 mrt. 2024 · We demonstrate theoretically that the thermal Hall effect of magnons in collinear antiferromagnetic insulators is an indicator of magnetic and topological phase … Web29 mrt. 2012 · ABSTRACT. The thermal conductivity of single crystals of MnF 2 was measured at temperatures between 0.4 and 4K in magnetic fields up to 33 kOe with the …
Web15 apr. 2024 · The magnitude of the magnetic contribution for the thermal conductivity is determined experimentally subtracting from it the phononic contribution κph ( T, ω) and thus measuring the total thermal conductivity κtot ( T, ω ). Hence, the phonon contribution must be determined also before to be determined the thermal conductivity. Web21 okt. 2024 · Thermal conductivity κ xx and thermal Hall conductivity κ xy of Sr 2 CuO 2 Cl 2 (sample A), plotted as κ xx /T 3 (blue) and −κ xy /T 3 (red) vs T. The dashed lines are a guide to the eye.
Web27 feb. 2013 · The ferromagnetic magnon specific heat Cm shows a characteristic T1.5-dependence down to 0.77 K. Below 0.77 K, a downward deviation is observed, which is …
Web22 sep. 2024 · We report a drastical increase in magnon conductivity of up to σm = 1.6 × 10 8 S m –1 at room temperature, which even exceeds the electronic spin conductivity of high-purity copper. This ... devonshire north bayWebNevertheless, since topological magnon edge states contribute to the transverse thermal Hall conductivity, it has recently been demonstrated that the nontrivial topological nature of the magnonic bands can be manifested experimentally by the thermal Hall effect even in a charge-neutral spin system (23–26). devonshire newcastle universityWeb15 apr. 2024 · DOI: 10.1016/J.PHYSC.2024.02.004 Corpus ID: 128172164; Magnon Hall conductivity and thermal transport in frustrated antiferromagnets @article{Lima2024MagnonHC, title={Magnon Hall conductivity and thermal transport in frustrated antiferromagnets}, author={Leonardo dos Santos Lima and E. B. M. … churchill\u0027s rvc menuWeb27 jan. 2024 · The thermal Hall effect, defined as a heat current response transversal to an applied temperature gradient, is a central experimental probe of exotic electrically … devonshire nurseryWeb27 jan. 2024 · The thermal conductivity measurements reveal the contrasting role of size effects on magnon and phonon transport. As the average grain size decreases from 4.2 to 0.83 μm, the lattice thermal conductivity of polycrystalline Ca 9 La 5 Cu 24 O 41 below about 100 K is significantly suppressed, due to the enhanced phonon-boundary scattering. devonshire newsWeb25 apr. 2024 · Magnon thermal conductivity calculated as a function of temperature without magnetic field (blue solid line) and at 70 kOe (blue dashed line). Red full and dotted lines represent (see text) calculated with and without damping, respectively. Inset: zoom of the low temperature range. devonshire neighborhood forney txWeb11 apr. 2024 · Yet, it is unknown how the topological properties are affected by magnon damping. We report the thermal Hall effect in Cr Ge Te, an insulating 2D honeycomb ferromagnet with a large Dirac magnon gap and significant magnon damping. Interestingly, the thermal Hall conductivity in Cr Ge Te shows the coexisting phonon and magnon … churchill\u0027s secret agents the new recruits