Longitudinal and transverse thermoelectric transport in MnSi
| Autor: | Atsutaka Maeda, Yoshinori Imai, Yoshinori Onose, Yuji Hirokane, Yasuhide Tomioka |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
Condensed matter physics Transition temperature 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Magnetic field symbols.namesake Magnetization Condensed Matter::Superconductivity Seebeck coefficient 0103 physical sciences Thermoelectric effect symbols Nernst equation 010306 general physics 0210 nano-technology Single crystal Nernst effect |
| Zdroj: | Physical Review B. 93 |
| ISSN: | 2469-9969 2469-9950 |
| Popis: | We have investigated the longitudinal and transverse thermoelectric phenomena (Seebeck and Nernst effects) in a single crystal of intermetallic compound MnSi. The Seebeck coefficient is largely decreased ($\ensuremath{\approx}50%$) by magnetic field around the helimagnetic transition temperature, which implies the large entropy release at the magnetic transition. We have discerned the anomalous and normal components of Nernst signal dependent on the magnetization and the magnetic field, respectively. For the anomalous Nernst effect, the intrinsic mechanism induced by the Berry phase of electrons seems dominant over the extrinsic mechanisms induced by scattering at least in the high temperature ($T\ensuremath{\ge}15$ K) and resistive ($\ensuremath{\rho}g4 \ensuremath{\mu}\mathrm{\ensuremath{\Omega}}\phantom{\rule{0.16em}{0ex}}\mathrm{cm}$) region. The Nernst and Seebeck signals show little change in the course of the transition to skyrmion crystal. |
| Databáze: | OpenAIRE |
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