Effect of Mo monoatomic interlayer on magnetic properties of in-plane anisotropic Nd-Fe-B/Mo/FeCo nanocomposite multilayered films

Kunihiro Koike; Kazuki Ohashi; Takuya Suzuki; Chihiro Okita; Nobuyuki Inaba; Hiroaki Kato; Masaru Itakura; Shigeo Hara; Yu Saito; Susumu Okubo; Hitoshi Ohta

doi:10.1063/9.0000181

Effect of Mo monoatomic interlayer on magnetic properties of in-plane anisotropic Nd-Fe-B/Mo/FeCo nanocomposite multilayered films

Kunihiro Koike, Kazuki Ohashi, Takuya Suzuki, Chihiro Okita, Nobuyuki Inaba, Hiroaki Kato, Masaru Itakura, Shigeo Hara, Yu Saito, Susumu Okubo, Hitoshi Ohta

Materials Physics and Engineering

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

2 Citations (Scopus)

Abstract

The Nd-Fe-B/Mo/Fe-Co multilayered films on MgO(001) were fabricated by UHV sputtering method. The as-deposited films showed soft magnetic properties with weak perpendicular magnetic anisotropy, and after annealing above 650°C, these films showed in-plane magnetic anisotropy, good squareness, and hard magnetic properties with high coercivity of about 8 kOe. The (220) peak of Nd2Fe14B was identified in the XRD pattern after annealing of the film, which means that the c-axis, which is the easy axis of magnetization, points in the plane of the film, consistent with the measurement of the magnetization curve. The positive peak of ΔM plot of in-plane direction of the film annealed at 800°C was shown. This result suggests existence of exchange coupling between the Nd-Fe-B and Fe-Co layers in the in-plane anisotropic multilayered film with monoatomic Mo interlayer.

Original language	English
Article number	0000181
Journal	AIP Advances
Volume	11
Issue number	1
DOIs	https://doi.org/10.1063/9.0000181
Publication status	Published - Jan 1 2021

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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@article{25494bc6f6e047e79af3957704c2c36e,

title = "Effect of Mo monoatomic interlayer on magnetic properties of in-plane anisotropic Nd-Fe-B/Mo/FeCo nanocomposite multilayered films",

abstract = "The Nd-Fe-B/Mo/Fe-Co multilayered films on MgO(001) were fabricated by UHV sputtering method. The as-deposited films showed soft magnetic properties with weak perpendicular magnetic anisotropy, and after annealing above 650°C, these films showed in-plane magnetic anisotropy, good squareness, and hard magnetic properties with high coercivity of about 8 kOe. The (220) peak of Nd2Fe14B was identified in the XRD pattern after annealing of the film, which means that the c-axis, which is the easy axis of magnetization, points in the plane of the film, consistent with the measurement of the magnetization curve. The positive peak of ΔM plot of in-plane direction of the film annealed at 800°C was shown. This result suggests existence of exchange coupling between the Nd-Fe-B and Fe-Co layers in the in-plane anisotropic multilayered film with monoatomic Mo interlayer.",

author = "Kunihiro Koike and Kazuki Ohashi and Takuya Suzuki and Chihiro Okita and Nobuyuki Inaba and Hiroaki Kato and Masaru Itakura and Shigeo Hara and Yu Saito and Susumu Okubo and Hitoshi Ohta",

note = "Funding Information: We are grateful to Mr. Y. Mizuno of Yamagata University for his helpful support in XRD and XRR analysis. This work supported in partly by the KAKENHI Grant Number 16H04488, 20K05059 and 20H02425, Japan Science Promotion Society (JSPS), Japan, and the Joint Usage Research in Molecular Photoscience Research center in Kobe University, Japan, and the Atomic scale electromagnetic Publisher Copyright: {\textcopyright} 2021 Author(s).",

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doi = "10.1063/9.0000181",

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T1 - Effect of Mo monoatomic interlayer on magnetic properties of in-plane anisotropic Nd-Fe-B/Mo/FeCo nanocomposite multilayered films

AU - Koike, Kunihiro

AU - Ohashi, Kazuki

AU - Suzuki, Takuya

AU - Okita, Chihiro

AU - Inaba, Nobuyuki

AU - Kato, Hiroaki

AU - Itakura, Masaru

AU - Hara, Shigeo

AU - Saito, Yu

AU - Okubo, Susumu

AU - Ohta, Hitoshi

N1 - Funding Information: We are grateful to Mr. Y. Mizuno of Yamagata University for his helpful support in XRD and XRR analysis. This work supported in partly by the KAKENHI Grant Number 16H04488, 20K05059 and 20H02425, Japan Science Promotion Society (JSPS), Japan, and the Joint Usage Research in Molecular Photoscience Research center in Kobe University, Japan, and the Atomic scale electromagnetic Publisher Copyright: © 2021 Author(s).

PY - 2021/1/1

Y1 - 2021/1/1

N2 - The Nd-Fe-B/Mo/Fe-Co multilayered films on MgO(001) were fabricated by UHV sputtering method. The as-deposited films showed soft magnetic properties with weak perpendicular magnetic anisotropy, and after annealing above 650°C, these films showed in-plane magnetic anisotropy, good squareness, and hard magnetic properties with high coercivity of about 8 kOe. The (220) peak of Nd2Fe14B was identified in the XRD pattern after annealing of the film, which means that the c-axis, which is the easy axis of magnetization, points in the plane of the film, consistent with the measurement of the magnetization curve. The positive peak of ΔM plot of in-plane direction of the film annealed at 800°C was shown. This result suggests existence of exchange coupling between the Nd-Fe-B and Fe-Co layers in the in-plane anisotropic multilayered film with monoatomic Mo interlayer.

AB - The Nd-Fe-B/Mo/Fe-Co multilayered films on MgO(001) were fabricated by UHV sputtering method. The as-deposited films showed soft magnetic properties with weak perpendicular magnetic anisotropy, and after annealing above 650°C, these films showed in-plane magnetic anisotropy, good squareness, and hard magnetic properties with high coercivity of about 8 kOe. The (220) peak of Nd2Fe14B was identified in the XRD pattern after annealing of the film, which means that the c-axis, which is the easy axis of magnetization, points in the plane of the film, consistent with the measurement of the magnetization curve. The positive peak of ΔM plot of in-plane direction of the film annealed at 800°C was shown. This result suggests existence of exchange coupling between the Nd-Fe-B and Fe-Co layers in the in-plane anisotropic multilayered film with monoatomic Mo interlayer.

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Effect of Mo monoatomic interlayer on magnetic properties of in-plane anisotropic Nd-Fe-B/Mo/FeCo nanocomposite multilayered films

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