Magnetic properties of Nd-Fe-B/α-Fe multi-layered thick film magnets

H. Fukunaga, H. Nakayama, T. Kamikawatoko, T. Yanai, M. Nakano, F. Yamashita, S. Ohta, M. Itakura, M. Nishida

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Nd-Fe-B/α-Fe multi-layered nanocomposite film-magnets were prepared from a rotating Nd2.6Fe14B/α-Fe composite target by the pulse laser deposition method with a Nd-YAG laser (λ=355 nm). The prepared film-magnets were composed of approximately 800 layers with the thickness of about several tens nanometre, and exhibited hard magnetic properties after annealing. The laser power for the ablation of the target was varied between 3 and 7 W, and it was found that the composition, magnetic properties, and the surface roughness of the prepared films depend on the laser power. A reduction in the laser power caused increases in remanence and the maximum energy product (BH)max as well as decreases in Nd content and coercivity of the films. All the samples had Nd-poor compositions compared with that of the Nd2.6Fe14B target and the Nd-contents of the films deposited with laser power of 3 W were less than that of the stoichiometric composition of Nd2Fe14B. The highest (BH)max and remanence values were obtained for a film deposited with laser power of 3 W, and were 90 kJ/m3 and 1.0 T, respectively. The obtained high remanence value is discussed from the viewpoint of the remanence enhancement as well as the large saturation magnetization of α-Fe.

Original languageEnglish
Article number012027
JournalJournal of Physics: Conference Series
Volume266
Issue number1
DOIs
Publication statusPublished - Jan 1 2011

Fingerprint

thick films
magnets
remanence
magnetic properties
lasers
laser deposition
ablation
coercivity
YAG lasers
nanocomposites
surface roughness
saturation
magnetization
annealing
composite materials
augmentation
products
pulses
energy

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Fukunaga, H., Nakayama, H., Kamikawatoko, T., Yanai, T., Nakano, M., Yamashita, F., ... Nishida, M. (2011). Magnetic properties of Nd-Fe-B/α-Fe multi-layered thick film magnets. Journal of Physics: Conference Series, 266(1), [012027]. https://doi.org/10.1088/1742-6596/266/1/012027

Magnetic properties of Nd-Fe-B/α-Fe multi-layered thick film magnets. / Fukunaga, H.; Nakayama, H.; Kamikawatoko, T.; Yanai, T.; Nakano, M.; Yamashita, F.; Ohta, S.; Itakura, M.; Nishida, M.

In: Journal of Physics: Conference Series, Vol. 266, No. 1, 012027, 01.01.2011.

Research output: Contribution to journalArticle

Fukunaga, H, Nakayama, H, Kamikawatoko, T, Yanai, T, Nakano, M, Yamashita, F, Ohta, S, Itakura, M & Nishida, M 2011, 'Magnetic properties of Nd-Fe-B/α-Fe multi-layered thick film magnets', Journal of Physics: Conference Series, vol. 266, no. 1, 012027. https://doi.org/10.1088/1742-6596/266/1/012027
Fukunaga H, Nakayama H, Kamikawatoko T, Yanai T, Nakano M, Yamashita F et al. Magnetic properties of Nd-Fe-B/α-Fe multi-layered thick film magnets. Journal of Physics: Conference Series. 2011 Jan 1;266(1). 012027. https://doi.org/10.1088/1742-6596/266/1/012027
Fukunaga, H. ; Nakayama, H. ; Kamikawatoko, T. ; Yanai, T. ; Nakano, M. ; Yamashita, F. ; Ohta, S. ; Itakura, M. ; Nishida, M. / Magnetic properties of Nd-Fe-B/α-Fe multi-layered thick film magnets. In: Journal of Physics: Conference Series. 2011 ; Vol. 266, No. 1.
@article{c7dfcd4123ad409ba4c72c1701b424c2,
title = "Magnetic properties of Nd-Fe-B/α-Fe multi-layered thick film magnets",
abstract = "Nd-Fe-B/α-Fe multi-layered nanocomposite film-magnets were prepared from a rotating Nd2.6Fe14B/α-Fe composite target by the pulse laser deposition method with a Nd-YAG laser (λ=355 nm). The prepared film-magnets were composed of approximately 800 layers with the thickness of about several tens nanometre, and exhibited hard magnetic properties after annealing. The laser power for the ablation of the target was varied between 3 and 7 W, and it was found that the composition, magnetic properties, and the surface roughness of the prepared films depend on the laser power. A reduction in the laser power caused increases in remanence and the maximum energy product (BH)max as well as decreases in Nd content and coercivity of the films. All the samples had Nd-poor compositions compared with that of the Nd2.6Fe14B target and the Nd-contents of the films deposited with laser power of 3 W were less than that of the stoichiometric composition of Nd2Fe14B. The highest (BH)max and remanence values were obtained for a film deposited with laser power of 3 W, and were 90 kJ/m3 and 1.0 T, respectively. The obtained high remanence value is discussed from the viewpoint of the remanence enhancement as well as the large saturation magnetization of α-Fe.",
author = "H. Fukunaga and H. Nakayama and T. Kamikawatoko and T. Yanai and M. Nakano and F. Yamashita and S. Ohta and M. Itakura and M. Nishida",
year = "2011",
month = "1",
day = "1",
doi = "10.1088/1742-6596/266/1/012027",
language = "English",
volume = "266",
journal = "Journal of Physics: Conference Series",
issn = "1742-6588",
publisher = "IOP Publishing Ltd.",
number = "1",

}

TY - JOUR

T1 - Magnetic properties of Nd-Fe-B/α-Fe multi-layered thick film magnets

AU - Fukunaga, H.

AU - Nakayama, H.

AU - Kamikawatoko, T.

AU - Yanai, T.

AU - Nakano, M.

AU - Yamashita, F.

AU - Ohta, S.

AU - Itakura, M.

AU - Nishida, M.

PY - 2011/1/1

Y1 - 2011/1/1

N2 - Nd-Fe-B/α-Fe multi-layered nanocomposite film-magnets were prepared from a rotating Nd2.6Fe14B/α-Fe composite target by the pulse laser deposition method with a Nd-YAG laser (λ=355 nm). The prepared film-magnets were composed of approximately 800 layers with the thickness of about several tens nanometre, and exhibited hard magnetic properties after annealing. The laser power for the ablation of the target was varied between 3 and 7 W, and it was found that the composition, magnetic properties, and the surface roughness of the prepared films depend on the laser power. A reduction in the laser power caused increases in remanence and the maximum energy product (BH)max as well as decreases in Nd content and coercivity of the films. All the samples had Nd-poor compositions compared with that of the Nd2.6Fe14B target and the Nd-contents of the films deposited with laser power of 3 W were less than that of the stoichiometric composition of Nd2Fe14B. The highest (BH)max and remanence values were obtained for a film deposited with laser power of 3 W, and were 90 kJ/m3 and 1.0 T, respectively. The obtained high remanence value is discussed from the viewpoint of the remanence enhancement as well as the large saturation magnetization of α-Fe.

AB - Nd-Fe-B/α-Fe multi-layered nanocomposite film-magnets were prepared from a rotating Nd2.6Fe14B/α-Fe composite target by the pulse laser deposition method with a Nd-YAG laser (λ=355 nm). The prepared film-magnets were composed of approximately 800 layers with the thickness of about several tens nanometre, and exhibited hard magnetic properties after annealing. The laser power for the ablation of the target was varied between 3 and 7 W, and it was found that the composition, magnetic properties, and the surface roughness of the prepared films depend on the laser power. A reduction in the laser power caused increases in remanence and the maximum energy product (BH)max as well as decreases in Nd content and coercivity of the films. All the samples had Nd-poor compositions compared with that of the Nd2.6Fe14B target and the Nd-contents of the films deposited with laser power of 3 W were less than that of the stoichiometric composition of Nd2Fe14B. The highest (BH)max and remanence values were obtained for a film deposited with laser power of 3 W, and were 90 kJ/m3 and 1.0 T, respectively. The obtained high remanence value is discussed from the viewpoint of the remanence enhancement as well as the large saturation magnetization of α-Fe.

UR - http://www.scopus.com/inward/record.url?scp=79952021931&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79952021931&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/266/1/012027

DO - 10.1088/1742-6596/266/1/012027

M3 - Article

AN - SCOPUS:79952021931

VL - 266

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

IS - 1

M1 - 012027

ER -