Temperature dependence of post-sintered annealing on magnetic properties of intergranular phase in Nd-Fe-B permanent magnet

Akira Yasui; Tetsuya Nakamura; Yoshinori Kotani; Tomoki Fukagawa; Takeshi Nishiuchi; Satoshi Hirosawa

doi:10.1063/1.4916938

Temperature dependence of post-sintered annealing on magnetic properties of intergranular phase in Nd-Fe-B permanent magnet

Akira Yasui, Tetsuya Nakamura, Yoshinori Kotani, Tomoki Fukagawa, Takeshi Nishiuchi, Satoshi Hirosawa

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

8 Citations (Scopus)

Abstract

Post-sinter-annealing temperature (T_a) dependences of the chemical and magnetic properties of intergranular (grain boundary; GB) phase in a Nd_14.0Fe_79.7B_6.2Cu_0.1 sintered magnet have been investigated by x-ray absorption spectroscopy and its magnetic circular dichroism. A relative change of the Cu concentration in the GB phase is found to depend on T_a and shows the maximum at T_a = 500 °C. The T_a-dependence of the Cu concentration was very similar to that of the coercivity. On the other hand, there is no significant T_a-dependence for the magnetization at the fracture surface: the Fe magnetic moment is 1.7 ± 0.036 μ_B at all T_a. The Cu-rich layer segregated in the GB phase would have a key role in the coercivity enhancement of the Nd-Fe-B sintered magnet.

Original language	English
Article number	17B313
Journal	Journal of Applied Physics
Volume	117
Issue number	17
DOIs	https://doi.org/10.1063/1.4916938
Publication status	Published - 2015 May 7
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1063/1.4916938

Fingerprint Dive into the research topics of 'Temperature dependence of post-sintered annealing on magnetic properties of intergranular phase in Nd-Fe-B permanent magnet'. Together they form a unique fingerprint.

Cite this

Temperature dependence of post-sintered annealing on magnetic properties of intergranular phase in Nd-Fe-B permanent magnet. / Yasui, Akira; Nakamura, Tetsuya; Kotani, Yoshinori; Fukagawa, Tomoki; Nishiuchi, Takeshi; Hirosawa, Satoshi.

In: Journal of Applied Physics, Vol. 117, No. 17, 17B313, 07.05.2015.

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

@article{e9db5a4bae5a496cbb8a84725da98947,

title = "Temperature dependence of post-sintered annealing on magnetic properties of intergranular phase in Nd-Fe-B permanent magnet",

abstract = "Post-sinter-annealing temperature (Ta) dependences of the chemical and magnetic properties of intergranular (grain boundary; GB) phase in a Nd14.0Fe79.7B6.2Cu0.1 sintered magnet have been investigated by x-ray absorption spectroscopy and its magnetic circular dichroism. A relative change of the Cu concentration in the GB phase is found to depend on Ta and shows the maximum at Ta = 500 °C. The Ta-dependence of the Cu concentration was very similar to that of the coercivity. On the other hand, there is no significant Ta-dependence for the magnetization at the fracture surface: the Fe magnetic moment is 1.7 ± 0.036 μB at all Ta. The Cu-rich layer segregated in the GB phase would have a key role in the coercivity enhancement of the Nd-Fe-B sintered magnet.",

author = "Akira Yasui and Tetsuya Nakamura and Yoshinori Kotani and Tomoki Fukagawa and Takeshi Nishiuchi and Satoshi Hirosawa",

year = "2015",

month = may,

day = "7",

doi = "10.1063/1.4916938",

language = "English",

volume = "117",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics Publising LLC",

number = "17",

}

TY - JOUR

T1 - Temperature dependence of post-sintered annealing on magnetic properties of intergranular phase in Nd-Fe-B permanent magnet

AU - Yasui, Akira

AU - Nakamura, Tetsuya

AU - Kotani, Yoshinori

AU - Fukagawa, Tomoki

AU - Nishiuchi, Takeshi

AU - Hirosawa, Satoshi

PY - 2015/5/7

Y1 - 2015/5/7

N2 - Post-sinter-annealing temperature (Ta) dependences of the chemical and magnetic properties of intergranular (grain boundary; GB) phase in a Nd14.0Fe79.7B6.2Cu0.1 sintered magnet have been investigated by x-ray absorption spectroscopy and its magnetic circular dichroism. A relative change of the Cu concentration in the GB phase is found to depend on Ta and shows the maximum at Ta = 500 °C. The Ta-dependence of the Cu concentration was very similar to that of the coercivity. On the other hand, there is no significant Ta-dependence for the magnetization at the fracture surface: the Fe magnetic moment is 1.7 ± 0.036 μB at all Ta. The Cu-rich layer segregated in the GB phase would have a key role in the coercivity enhancement of the Nd-Fe-B sintered magnet.

AB - Post-sinter-annealing temperature (Ta) dependences of the chemical and magnetic properties of intergranular (grain boundary; GB) phase in a Nd14.0Fe79.7B6.2Cu0.1 sintered magnet have been investigated by x-ray absorption spectroscopy and its magnetic circular dichroism. A relative change of the Cu concentration in the GB phase is found to depend on Ta and shows the maximum at Ta = 500 °C. The Ta-dependence of the Cu concentration was very similar to that of the coercivity. On the other hand, there is no significant Ta-dependence for the magnetization at the fracture surface: the Fe magnetic moment is 1.7 ± 0.036 μB at all Ta. The Cu-rich layer segregated in the GB phase would have a key role in the coercivity enhancement of the Nd-Fe-B sintered magnet.

UR - http://www.scopus.com/inward/record.url?scp=84948734386&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84948734386&partnerID=8YFLogxK

U2 - 10.1063/1.4916938

DO - 10.1063/1.4916938

M3 - Article

AN - SCOPUS:84948734386

VL - 117

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 17

M1 - 17B313

ER -

Temperature dependence of post-sintered annealing on magnetic properties of intergranular phase in Nd-Fe-B permanent magnet

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Cite this