Dependence of anomalous Nernst effect on crystal orientation in highly ordered γ′-Fe4N films with anti-perovskite structure

Shinji Isogami; Koki Takanashi; Masaki Mizuguchi

doi:10.7567/APEX.10.073005

Dependence of anomalous Nernst effect on crystal orientation in highly ordered γ′-Fe₄N films with anti-perovskite structure

Shinji Isogami, Koki Takanashi, Masaki Mizuguchi

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

The anomalous Nernst effect (ANE) in highly ordered Fe₄N films was examined in the measurement configuration with an in-plane temperature gradient (∇T_x). The anomalous Nernst coefficient (Q_s) in the case of ∇T_x || Fe₄N[110] was clearly larger than that in the case of ∇T_x || Fe₄N[100]. Note here that no reports on the Q_s in Fe₄N films have been presented. This anisotropic Q_s (Q_ani) was also observed in a different configuration with an out-of-plane temperature gradient. Unlike Fe₄N, pure Fe and A2-FeAl systems showed a negligible Q_ani. This Q_ani might be attributed to the specific hybridization effects between the 3d orbitals of Fe and the 2p orbitals of N.

Original language	English
Article number	073005
Journal	Applied Physics Express
Volume	10
Issue number	7
DOIs	https://doi.org/10.7567/APEX.10.073005
Publication status	Published - 2017 Jul

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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title = "Dependence of anomalous Nernst effect on crystal orientation in highly ordered γ′-Fe4N films with anti-perovskite structure",

abstract = "The anomalous Nernst effect (ANE) in highly ordered Fe4N films was examined in the measurement configuration with an in-plane temperature gradient (∇Tx). The anomalous Nernst coefficient (Qs) in the case of ∇Tx || Fe4N[110] was clearly larger than that in the case of ∇Tx || Fe4N[100]. Note here that no reports on the Qs in Fe4N films have been presented. This anisotropic Qs (Qani) was also observed in a different configuration with an out-of-plane temperature gradient. Unlike Fe4N, pure Fe and A2-FeAl systems showed a negligible Qani. This Qani might be attributed to the specific hybridization effects between the 3d orbitals of Fe and the 2p orbitals of N.",

author = "Shinji Isogami and Koki Takanashi and Masaki Mizuguchi",

note = "Funding Information: This work was supported by the collaborative research program No. 16K0089 of Institute for Materials Research, Tohoku University, CREST (Grant No. JPMJCR1524) from Japan Science and Technology Agency, and a Grant-in-Aid for Scientific Research (S) (25220910) from the Japan Society for the Promotion of Science. The authors thank Mr. H. Suzuki for technical support in the study of the ANE, Dr. M. Tsunoda for sharing the SQUID-VSM and XRD machines, and Dr. T. Kawai for the fabrication of Fe-Al films. Publisher Copyright: {\textcopyright} 2017 The Japan Society of Applied Physics.",

year = "2017",

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doi = "10.7567/APEX.10.073005",

language = "English",

volume = "10",

journal = "Applied Physics Express",

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AU - Takanashi, Koki

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N1 - Funding Information: This work was supported by the collaborative research program No. 16K0089 of Institute for Materials Research, Tohoku University, CREST (Grant No. JPMJCR1524) from Japan Science and Technology Agency, and a Grant-in-Aid for Scientific Research (S) (25220910) from the Japan Society for the Promotion of Science. The authors thank Mr. H. Suzuki for technical support in the study of the ANE, Dr. M. Tsunoda for sharing the SQUID-VSM and XRD machines, and Dr. T. Kawai for the fabrication of Fe-Al films. Publisher Copyright: © 2017 The Japan Society of Applied Physics.

PY - 2017/7

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AB - The anomalous Nernst effect (ANE) in highly ordered Fe4N films was examined in the measurement configuration with an in-plane temperature gradient (∇Tx). The anomalous Nernst coefficient (Qs) in the case of ∇Tx || Fe4N[110] was clearly larger than that in the case of ∇Tx || Fe4N[100]. Note here that no reports on the Qs in Fe4N films have been presented. This anisotropic Qs (Qani) was also observed in a different configuration with an out-of-plane temperature gradient. Unlike Fe4N, pure Fe and A2-FeAl systems showed a negligible Qani. This Qani might be attributed to the specific hybridization effects between the 3d orbitals of Fe and the 2p orbitals of N.

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