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Paramagnon drag thermopower

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 … WebOct 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.

Paramagnetic Spins Take Electrons for a Ride, Produce Electricity …

WebSep 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. 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 dishwasher 30 height https://mondo-lirondo.com

CONDENSED MATTER PHYSICS Observation of enhanced …

Webtion to thermopower in MnTe far above the Néel temperature was reported, which was associated with the paramagnon-drag effect [3,4,13,14]. Like magnon and paramagnon drag, spin entropy and spin fluctuation in a system has also led to significant enhancement of the thermopower [5–8]. *[email protected] WebSep 1, 2024 · Paramagnon drag in high thermoelectric figure of merit Li-doped MnTe. Y. Zheng, T. Lu, +10 authors H. Zhao; ... 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 proposed that the giant spin Seebeck effect is mediated by phonon–electron drag, which changes the ... WebApr 11, 2024 · Thermopower in Si-Ge Alloy Nanowire Kasala Suresha. Department of Physics, Government First Grade College, MCC B Block, Davanagere – 577 004, India. covid testing florham park

Phys. Rev. B 105, 045101 (2024) - Effect of paramagnon …

Category:Real-space visualization of short-range ... - ScienceDirect

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Paramagnon drag thermopower

Real-space visualization of short-range ... - ScienceDirect

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 25, 2024 · Recently, the paramagnon drag effect was discovered, in which local thermal fluctuations of the magnetization known as paramagnons drag charge carriers and impart …

Paramagnon drag thermopower

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WebThe researchers found that local thermal perturbations of spins in a solid can convert heat to energy even in a paramagnetic material- where spins weren’t thought to correlate long enough to do so. This effect, which the researchers call “paramagnon drag thermopower,” converts a temperature difference into an electrical voltage. WebParamagnon drag yields a high thermoelectric figure of merit in Li-doped MnTe. MnTe is an antiferromagnetic semiconductor with a Neel temperature of 307 K. In the antiferromagnet phase, the magnon-electron interaction gives rise to a magnon-drag contribution to thermopower. Surprisingly this magnon-drag thermopower extends to the paramagnetic ...

WebAbstractThe antiferromagnetic semiconductor MnTe has recently attracted significant interest as a potential high-performance thermoelectric material. Its promising thermoelectric properties are due in large part to short-range magnetic correlations in the paramagnetic state, which enhance the thermopower through the paramagnon drag effect. 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 …

WebSep 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 … WebThe research team tested the concept of paramagnon drag thermopower by heating lithium-doped MnTe to approximately 250 degrees Celsius above its Néel temperature (34 …

WebSep 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 …

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 ]. dishwasher 318 687 010Web2 days ago · The paramagnon drag effect resulted in a technologically significant ZT improvement from 0.8 to ∼1 at 900 K for 0.3% Li-doped MnTe and 3% Li ... magnons interact differently with the carriers and generate different amts. of drag-thermopower. The question arises of whether the MED is stronger in FM or in AFM semiconductors. Two material ... dishwasher 3195177ona door latchWebrisetoasecondcontributiontothethermopowera,themagnon-drag thermopower a md. Magnon drag was first discussed in the 1960s as … dishwasher 30\\u0027 hose extensionWebJun 1, 2024 · Recently, the paramagnon drag effect was discovered, in which local thermal fluctuations of the magnetization known as paramagnons drag charge carriers and impart … covid testing flying to usa from ukWebJan 20, 2024 · However, it was recently shown that the thermopower can be enhanced even by short-range magnetic correlations, rather than true long-range order, through "paramagnon drag" [6, 7]. Analogous to ... dishwasher 32 heightWebSep 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 … dishwasher 32.5 heightWebApr 12, 2024 · 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. Theoretical models are presented for two contributions to magnon-drag. dishwasher 32 inches height