Paramagnon drag thermopower
WebParamagnon drag has been experimentally observed in many paramagnetic spin fluctuation systems such as (Sc,Lu,Y)Co2 [1] or UAl2 [2] near their spin fluctuation temperatures. …
Paramagnon drag thermopower
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WebSep 12, 2011 · J. Heremans Physics 2016 Magnon drag is shown to dominate the thermopower of elemental Fe from 2 to 80 K and of elemental Co from 150 to 600 K; it is also shown to contribute to the thermopower of elemental Ni from 50 to 500… 67 PDF Magnons versus electrons in thermal spin transport through metallic interfaces WebJun 1, 2024 · Enhancing the thermopower through paramagnon drag was first demonstrated in the high-performance thermoelectric candidate MnTe, 15 an antiferromagnetic (AF) semiconductor with the hexagonal NiAs structure type.
Webphase transition temperature.21 ,22 23 However, the paramagnon-drag enhances the thermopower, and consequently the 2figure-of-merit (zT = Tα 1/κ, T is the temperature), in the disordered magnetic domain where the short-range magnetic ordering helps to survive the spin-wave packets, a.k.a paramagnon quasiparticles, that act like magnons to ... WebApr 11, 2024 · Magnon Drag (MD) • DRAG is advective transport inside a bulk sample • Thermal force is exerted on magnons via phonon-magnon coupling • Magnon flux drags …
WebMar 11, 2024 · The phenomenon was explained by magnon (or paramagnon) drag, but not spin entropy. Nevertheless, this study gives some clues about the optimization of the spin degree of freedom. The maximum ZT of Li-doped MnTe reaches 1 at 900 K [ 36 ]. Webcaloritronic effects, such as spin-Seebeck, 1 magnon-drag,2,3 magnon-bipolar drag,4 paramagnon-drag,5 and spin-entropy6 effects. Over the past two decades, the progress in thermoelectric research has been primarily dominated by finding methods for reducing the thermal conductivity of the materials,such as increasing the phonon scattering
WebAbstract. The extension of magnon electron drag (MED) to the paramagnetic domain has recently shown that it can create a thermopower more significant than the classical …
Webcoefficients were attributed to the paramagnon drag effect, indicat-ing the pronounced spin fluctuation contribution (13). The effect of spin fluctuation was also discussed for the filled skutterudites AFe 4Sb 12 (A = Ca, Sr, Ba), which are considered to be close to the ferromagnetic instability (14). The Seebeck coefficient of AFe 4Sb 12 quaker instant oatmeal reduced sugarWebSep 12, 2011 · We point out a relation between the dissipative spin-transfer-torque parameter β and the contribution of magnon drag to the thermoelectric power in … quaker instant oatmeal variety 52 ctWebSep 1, 2024 · Local thermal magnetization fluctuations in Li-doped MnTe are found to increase its thermopower α strongly at temperatures up to 900 K. Below the Néel … quaker instant oatmeal realWebSep 19, 2024 · The research team tested the concept of paramagnon drag thermopower by heating lithium-doped MnTe to approximately 250 degrees Celsius above its Néel temperature (34 degrees Celsius) - the temperature at which the spins in the material lose their long-range magnetic order and the material becomes paramagnetic. quaker instant oatmeal select startsWebSep 10, 1998 · AFM transition. It is because the electron-phonon scattering rate is not significantly affected by the antiferromagnetic electron-spin-ordering transition. Unlike for phonon, AFM ordering suppresses spin-fluctuations and thus paramagnon-drag thermopower is reduced below TN. The S charge in Fig. 1is quite similar to that observed in quaker instant oatmeal vanillaWebOct 14, 2024 · This effect is called "paramagnon drag thermopower" and can convert the temperature difference into electrical energy. This discovery helps to collect heat more efficiently, for example, by converting heat from the car's exhaust into electricity, improving fuel efficiency, or powering smart clothing through body heat. quaker instant oatmeal tinWebSep 13, 2024 · The research team tested the concept of paramagnon drag thermopower by heating lithium-doped MnTe to approximately 250 degrees Celsius above its Néel … quaker instant oatmeal weight