Magnon drag effect in Fe-Co alloys
Magnon drag effect in Fe-Co alloys
复制标题
Fe-Co 合金中的磁振子阻力效应
DOI：
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发表时间：
2019
影响因子：
3.2
通讯作者：
J. Heremans
中科院分区：
文献类型：
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作者：
Yuanhua Zheng;E. Weiss;Nikolas Antolin;W. Windl;J. Heremans
我们在这里报告了对富含Fe的Fe-Co体心立方合金的磁振子拖曳诱导热电性能的系统研究。磁振子阻力的流体动力学理论解释了热电势的低温行为的迹象，由Fe-Co合金基态的密度泛函理论计算得到。某些合金的高温热电势，以及元素铁的高温热电势，改变了符号，正如先前所观察到的。我们提出了一种机制来阐明这一迄今无法解释的观察。此外，Fe 72 Co28的功率因数在500 K时达到峰值约35 μV/cm K2，与标准热电材料Bi 2 Te 3相当。Fe-Co合金由于具有高的热电功率因数，是电子器件主动冷却的潜在候选热电金属，本文系统研究了富Fe、Fe-Co体心立方合金的磁振子拖曳感生热电性质。磁振子阻力的流体动力学理论解释了热电势的低温行为的迹象，由Fe-Co合金基态的密度泛函理论计算得到。某些合金的高温热电势，以及元素铁的高温热电势，改变了符号，正如先前所观察到的。我们提出了一种机制来阐明这一迄今无法解释的观察。此外，Fe 72 Co28的功率因数在500 K时达到峰值约35 μV/cm K2，与标准热电材料Bi 2 Te 3相当。Fe-Co合金具有较高的热电功率因数，是电子器件主动冷却的潜在候选热电金属。
We report here a systematic study of the magnon-drag induced thermoelectric properties of Fe-rich, Fe-Co body-centered-cubic alloys. The sign of the low temperature behavior of thermopower is explained well by the hydrodynamic theory for magnon-drag, informed by density functional theory calculations of the ground state of Fe-Co alloys. The high-temperature thermopower of some of the alloys, and indeed that of elemental iron, changes the sign, as previously observed. We propose a mechanism to elucidate this hitherto unexplained observation. Further, the power factor of Fe72Co28 peaks around 35 μV/cm K2 at 500 K, comparable to the standard thermoelectric material Bi2Te3. Because of their high thermoelectric power factor, Fe-Co alloys are potential candidate thermoelectric metals for active cooling of electronic devices.We report here a systematic study of the magnon-drag induced thermoelectric properties of Fe-rich, Fe-Co body-centered-cubic alloys. The sign of the low temperature behavior of thermopower is explained well by the hydrodynamic theory for magnon-drag, informed by density functional theory calculations of the ground state of Fe-Co alloys. The high-temperature thermopower of some of the alloys, and indeed that of elemental iron, changes the sign, as previously observed. We propose a mechanism to elucidate this hitherto unexplained observation. Further, the power factor of Fe72Co28 peaks around 35 μV/cm K2 at 500 K, comparable to the standard thermoelectric material Bi2Te3. Because of their high thermoelectric power factor, Fe-Co alloys are potential candidate thermoelectric metals for active cooling of electronic devices.
影响因子：
4.6
作者：
Adams, M. J.;Verosky, M.;Heremans, J. P.
通讯作者：
Heremans, J. P.