Isotropic Nd-Fe-B thick-film magnets for micro-rotors prepared by PLD method

Masaki Nakano; Masaru Itakura; Takeshi Yanai; Fumitoshi Yamashita; Hirotoshi Fukunaga

doi:10.1002/eej.22513

Isotropic Nd-Fe-B thick-film magnets for micro-rotors prepared by PLD method

Masaki Nakano, Masaru Itakura, Takeshi Yanai, Fumitoshi Yamashita, Hirotoshi Fukunaga

Materials Physics and Engineering

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

Abstract

The flexibility of magnetization of isotropic thick-film magnets enabled us to enhance the torque of a millimeter-size motor comprising a multipolar magnetized rotor compared to the torque of a miniaturized motor using an anisotropic Nd-Fe-B sintered magnet. In order to upgrade the torque of the small motor further, an increase in the remanence value of the isotropic films is indispensable. In this study, therefore, we prepared nano-composite Nd-Fe-B thick films by a high-speed PLD (pulsed laser deposition) method with a deposition rate of approximately 40 μm/h. Resultantly, the use of additive (Zr or Nb) was effective to enhance the coercivity value of Nd-Fe-B thick-film magnets with Nd-poor composition, however it was difficult to increase the remanence values. In order to apply the thick films to a micro-rotor, investigation on several experiments related to mechanical property was also carried out.

Original language	English
Pages (from-to)	1-6
Number of pages	6
Journal	Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)
Volume	187
Issue number	3
DOIs	https://doi.org/10.1002/eej.22513
Publication status	Published - May 2014

All Science Journal Classification (ASJC) codes

Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1002/eej.22513

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title = "Isotropic Nd-Fe-B thick-film magnets for micro-rotors prepared by PLD method",

abstract = "The flexibility of magnetization of isotropic thick-film magnets enabled us to enhance the torque of a millimeter-size motor comprising a multipolar magnetized rotor compared to the torque of a miniaturized motor using an anisotropic Nd-Fe-B sintered magnet. In order to upgrade the torque of the small motor further, an increase in the remanence value of the isotropic films is indispensable. In this study, therefore, we prepared nano-composite Nd-Fe-B thick films by a high-speed PLD (pulsed laser deposition) method with a deposition rate of approximately 40 μm/h. Resultantly, the use of additive (Zr or Nb) was effective to enhance the coercivity value of Nd-Fe-B thick-film magnets with Nd-poor composition, however it was difficult to increase the remanence values. In order to apply the thick films to a micro-rotor, investigation on several experiments related to mechanical property was also carried out.",

author = "Masaki Nakano and Masaru Itakura and Takeshi Yanai and Fumitoshi Yamashita and Hirotoshi Fukunaga",

year = "2014",

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AU - Nakano, Masaki

AU - Itakura, Masaru

AU - Yanai, Takeshi

AU - Yamashita, Fumitoshi

AU - Fukunaga, Hirotoshi

PY - 2014/5

Y1 - 2014/5

N2 - The flexibility of magnetization of isotropic thick-film magnets enabled us to enhance the torque of a millimeter-size motor comprising a multipolar magnetized rotor compared to the torque of a miniaturized motor using an anisotropic Nd-Fe-B sintered magnet. In order to upgrade the torque of the small motor further, an increase in the remanence value of the isotropic films is indispensable. In this study, therefore, we prepared nano-composite Nd-Fe-B thick films by a high-speed PLD (pulsed laser deposition) method with a deposition rate of approximately 40 μm/h. Resultantly, the use of additive (Zr or Nb) was effective to enhance the coercivity value of Nd-Fe-B thick-film magnets with Nd-poor composition, however it was difficult to increase the remanence values. In order to apply the thick films to a micro-rotor, investigation on several experiments related to mechanical property was also carried out.

AB - The flexibility of magnetization of isotropic thick-film magnets enabled us to enhance the torque of a millimeter-size motor comprising a multipolar magnetized rotor compared to the torque of a miniaturized motor using an anisotropic Nd-Fe-B sintered magnet. In order to upgrade the torque of the small motor further, an increase in the remanence value of the isotropic films is indispensable. In this study, therefore, we prepared nano-composite Nd-Fe-B thick films by a high-speed PLD (pulsed laser deposition) method with a deposition rate of approximately 40 μm/h. Resultantly, the use of additive (Zr or Nb) was effective to enhance the coercivity value of Nd-Fe-B thick-film magnets with Nd-poor composition, however it was difficult to increase the remanence values. In order to apply the thick films to a micro-rotor, investigation on several experiments related to mechanical property was also carried out.

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Isotropic Nd-Fe-B thick-film magnets for micro-rotors prepared by PLD method

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