The effect of Zr substitution on saturation magnetization in (Sm1-xZrx)(Fe0.8Co0.2)12 compound with the ThMn12 structure

P. Tozman; Y. K. Takahashi; H. Sepehri-Amin; D. Ogawa; S. Hirosawa; K. Hono

doi:10.1016/j.actamat.2019.08.003

The effect of Zr substitution on saturation magnetization in (Sm_1-xZr_x)(Fe_0.8Co_0.2)₁₂ compound with the ThMn₁₂ structure

P. Tozman, Y. K. Takahashi^*, H. Sepehri-Amin, D. Ogawa, S. Hirosawa, K. Hono

^*Corresponding author for this work

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

35 Citations (Scopus)

Abstract

Zr is one of the essential elements to stabilize the ThMn₁₂ structure in rare earth (R) transition metal (M) hard magnetic compounds, RM₁₂. In this work, the effects of Zr on the intrinsic hard magnetic properties of (Sm_1-x Zr_x)(Fe_0.8Co_0.2)₁₂ compounds are investigated using epitaxially grown thin films. The increase of Zr substitution for Sm from x = 0 to 0.26 for (Sm_1-x Zr_x)(Fe_0.8Co_0.2)₁₂ increases saturation magnetization (μ₀M_s) from 1.78 T to 1.90 T, the highest value reported for hard magnetic compounds. The largest μ₀H_a and T_c for Zr-doped samples were found to be 9.8 T and 671 K for x = 0.18 which is superior to those for Nd₂Fe₁₄B. Sm-rich Sm_1.30Zr_0.27(Fe_0.8Co_0.2)₁₂, obtained as sub-μm thick films, has remanence, μ₀M_r of 1 T, which appears to be useful for near-field applications such as micro-electro-machines and magnetic recording media if microstructure can be optimized to obtain a sufficient coercivity.

Original language	English
Pages (from-to)	114-121
Number of pages	8
Journal	Acta Materialia
Volume	178
DOIs	https://doi.org/10.1016/j.actamat.2019.08.003
Publication status	Published - 2019 Oct 1
Externally published	Yes

Keywords

Coercivity
Magnetic properties
Magnetization
Permanent magnet
ThMn structure

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Polymers and Plastics
Metals and Alloys

Access to Document

10.1016/j.actamat.2019.08.003

Cite this

@article{30dafa6c6a634bc4954108248a33767f,

title = "The effect of Zr substitution on saturation magnetization in (Sm1-xZrx)(Fe0.8Co0.2)12 compound with the ThMn12 structure",

abstract = "Zr is one of the essential elements to stabilize the ThMn12 structure in rare earth (R) transition metal (M) hard magnetic compounds, RM12. In this work, the effects of Zr on the intrinsic hard magnetic properties of (Sm1-x Zrx)(Fe0.8Co0.2)12 compounds are investigated using epitaxially grown thin films. The increase of Zr substitution for Sm from x = 0 to 0.26 for (Sm1-x Zrx)(Fe0.8Co0.2)12 increases saturation magnetization (μ0Ms) from 1.78 T to 1.90 T, the highest value reported for hard magnetic compounds. The largest μ0Ha and Tc for Zr-doped samples were found to be 9.8 T and 671 K for x = 0.18 which is superior to those for Nd2Fe14B. Sm-rich Sm1.30Zr0.27(Fe0.8Co0.2)12, obtained as sub-μm thick films, has remanence, μ0Mr of 1 T, which appears to be useful for near-field applications such as micro-electro-machines and magnetic recording media if microstructure can be optimized to obtain a sufficient coercivity.",

keywords = "Coercivity, Magnetic properties, Magnetization, Permanent magnet, ThMn structure",

author = "P. Tozman and Takahashi, {Y. K.} and H. Sepehri-Amin and D. Ogawa and S. Hirosawa and K. Hono",

note = "Funding Information: The part of this work was supported by the Elements Strategy Initiative Project under the auspice of Ministry of Education, Culture, Sports, Science and Technology , Japan. Publisher Copyright: {\textcopyright} 2019 Acta Materialia Inc.",

year = "2019",

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doi = "10.1016/j.actamat.2019.08.003",

language = "English",

volume = "178",

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T1 - The effect of Zr substitution on saturation magnetization in (Sm1-xZrx)(Fe0.8Co0.2)12 compound with the ThMn12 structure

AU - Tozman, P.

AU - Takahashi, Y. K.

AU - Sepehri-Amin, H.

AU - Ogawa, D.

AU - Hirosawa, S.

AU - Hono, K.

N1 - Funding Information: The part of this work was supported by the Elements Strategy Initiative Project under the auspice of Ministry of Education, Culture, Sports, Science and Technology , Japan. Publisher Copyright: © 2019 Acta Materialia Inc.

PY - 2019/10/1

Y1 - 2019/10/1

N2 - Zr is one of the essential elements to stabilize the ThMn12 structure in rare earth (R) transition metal (M) hard magnetic compounds, RM12. In this work, the effects of Zr on the intrinsic hard magnetic properties of (Sm1-x Zrx)(Fe0.8Co0.2)12 compounds are investigated using epitaxially grown thin films. The increase of Zr substitution for Sm from x = 0 to 0.26 for (Sm1-x Zrx)(Fe0.8Co0.2)12 increases saturation magnetization (μ0Ms) from 1.78 T to 1.90 T, the highest value reported for hard magnetic compounds. The largest μ0Ha and Tc for Zr-doped samples were found to be 9.8 T and 671 K for x = 0.18 which is superior to those for Nd2Fe14B. Sm-rich Sm1.30Zr0.27(Fe0.8Co0.2)12, obtained as sub-μm thick films, has remanence, μ0Mr of 1 T, which appears to be useful for near-field applications such as micro-electro-machines and magnetic recording media if microstructure can be optimized to obtain a sufficient coercivity.

AB - Zr is one of the essential elements to stabilize the ThMn12 structure in rare earth (R) transition metal (M) hard magnetic compounds, RM12. In this work, the effects of Zr on the intrinsic hard magnetic properties of (Sm1-x Zrx)(Fe0.8Co0.2)12 compounds are investigated using epitaxially grown thin films. The increase of Zr substitution for Sm from x = 0 to 0.26 for (Sm1-x Zrx)(Fe0.8Co0.2)12 increases saturation magnetization (μ0Ms) from 1.78 T to 1.90 T, the highest value reported for hard magnetic compounds. The largest μ0Ha and Tc for Zr-doped samples were found to be 9.8 T and 671 K for x = 0.18 which is superior to those for Nd2Fe14B. Sm-rich Sm1.30Zr0.27(Fe0.8Co0.2)12, obtained as sub-μm thick films, has remanence, μ0Mr of 1 T, which appears to be useful for near-field applications such as micro-electro-machines and magnetic recording media if microstructure can be optimized to obtain a sufficient coercivity.

KW - Coercivity

KW - Magnetic properties

KW - Magnetization

KW - Permanent magnet

KW - ThMn structure

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