TY - JOUR
T1 - Spin-mediated charge-to-heat current conversion phenomena in ferromagnetic binary alloys
AU - Miura, Asuka
AU - Iguchi, Ryo
AU - Seki, Takeshi
AU - Takanashi, Koki
AU - Uchida, Ken Ichi
N1 - Funding Information:
The authors thank K. Masuda and Y. Miura for valuable discussions and M. Isomura and Materials Processing Group, Materials Manufacturing and Engineering Station, National Institute for Materials Science, for technical supports in sample preparation. This work was supported by CREST “Creation of Innovative Core Technologies for Nano-enabled Thermal Management” (JPMJCR17I1) from JST, Japan, Grant-in-Aid for Scientific Research (B) (JP19H02585), Grant-in-Aid for Scientific Research (S) (JP18H05246), and Grant-in-Aid for Early-Career Scientists (JP18K14116) from JSPS KAKENHI, Japan, and the NEC Corporation. A.M. is supported by JSPS through a research fellowship for young scientists (JP18J02115).
Funding Information:
The authors thank K. Masuda and Y. Miura for valuable discussions and M. Isomura and Materials Processing Group, Materials Manufacturing and Engineering Station, National Institute for Materials Science, for technical supports in sample preparation. This work was supported by CREST ???Creation of Innovative Core Technologies for Nano-enabled Thermal Management??(JPMJCR17I1) from JST, Japan, Grant-in-Aid for Scientific Research (B) (JP19H02585), Grant-in-Aid for Scientific Research (S) (JP18H05246), and Grant-in-Aid for Early-Career Scientists (JP18K14116) from JSPS KAKENHI, Japan, and the NEC Corporation. A.M. is supported by JSPS through a research fellowship for young scientists (JP18J02115).
Publisher Copyright:
© 2020 American Physical Society.
PY - 2020/3
Y1 - 2020/3
N2 - Spin-mediated charge-to-heat current conversion phenomena, i.e., the anomalous Ettingshausen effect (AEE) and the anisotropic magneto-Peltier effect (AMPE), have been investigated in various ferromagnetic Ni-Fe, Ni-Pt, Ni-Pd, and Fe-Pt binary alloys at room temperature. When a charge current is applied to a ferromagnetic conductor, the AMPE modulates the Peltier coefficient depending on the angle between the directions of the charge current and magnetization, while the AEE generates a heat current in the direction perpendicular to both the charge current and magnetization. We observed the strong material dependence of the thermoelectric conversion coefficients and figures of merit of these phenomena. Among the ferromagnetic alloys used in this study, Ni95Pt5 exhibits the largest AMPE of which the anisotropy of the Peltier coefficient is ∼12%. In contrast, the magnitude of the AEE signals is moderate in Ni95Pt5 but largest in Ni75Pt25 and Ni50Fe50. We discuss these behaviors by exploring the relations between these charge-to-heat current conversion phenomena and other transport as well as magnetic properties. This systematic study will provide a clue for clarifying the mechanisms of the AMPE and AEE and for enhancing the thermoelectric conversion efficiency of these phenomena.
AB - Spin-mediated charge-to-heat current conversion phenomena, i.e., the anomalous Ettingshausen effect (AEE) and the anisotropic magneto-Peltier effect (AMPE), have been investigated in various ferromagnetic Ni-Fe, Ni-Pt, Ni-Pd, and Fe-Pt binary alloys at room temperature. When a charge current is applied to a ferromagnetic conductor, the AMPE modulates the Peltier coefficient depending on the angle between the directions of the charge current and magnetization, while the AEE generates a heat current in the direction perpendicular to both the charge current and magnetization. We observed the strong material dependence of the thermoelectric conversion coefficients and figures of merit of these phenomena. Among the ferromagnetic alloys used in this study, Ni95Pt5 exhibits the largest AMPE of which the anisotropy of the Peltier coefficient is ∼12%. In contrast, the magnitude of the AEE signals is moderate in Ni95Pt5 but largest in Ni75Pt25 and Ni50Fe50. We discuss these behaviors by exploring the relations between these charge-to-heat current conversion phenomena and other transport as well as magnetic properties. This systematic study will provide a clue for clarifying the mechanisms of the AMPE and AEE and for enhancing the thermoelectric conversion efficiency of these phenomena.
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U2 - 10.1103/PhysRevMaterials.4.034409
DO - 10.1103/PhysRevMaterials.4.034409
M3 - Article
AN - SCOPUS:85083366585
SN - 2475-9953
VL - 4
JO - Physical Review Materials
JF - Physical Review Materials
IS - 3
M1 - 034409
ER -