Rare earth magnets

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United States of America Patent

PATENT NO 11721479
APP PUB NO 20210065973A1
SERIAL NO

17000796

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Abstract

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A rare earth magnet including a magnetic phase having the composition represented by (Nd(1−x−y)LaxCey)2(Fe(1−z)Coz)14B. When the saturation magnetization at absolute zero and the Curie temperature calculated by Kuzmin's formula based on the measured values at finite temperature and the saturation magnetization at absolute zero and the Curie temperature calculated by first principles calculation are respectively subjected to data assimilation. The saturation magnetization M(x, y, z, T=0) at absolute zero and the Curie temperature obtained by machine learning using the assimilated data group are applied again to Kuzmin's formula and the saturation magnetization at finite temperature is represented by a function M(x, y, z, T), x, y, and z of the formula in an atomic ratio are in a range of satisfying M(x, y, z, T)>M(x, y, z=0, T) and 400≤T≤453.

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Patent Owner(s)

Patent OwnerAddress
TOYOTA JIDOSHA KABUSHIKI KAISHA1 TOYOTA-CHO TOYOTA-SHI AICHI-KEN 471-8571
THE UNIVERSITY OF TOKYOTOKYO JAPAN TOKYO METROPOLIS

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Akai, Hisazumi Tokyo, JP 4 5
Harashima, Yosuke Tsukuba, JP 2 2
Kawashima, Naoki Tokyo, JP 24 122
Matsumoto, Munehisa Tokyo, JP 2 8
Miyake, Takashi Tsukuba, JP 114 1350
Sakuma, Noritsugu Mishima, JP 55 138
Syoji, Tetsuya Susono, JP 1 2
Tamai, Keiichi Tokyo, JP 3 11
Yokota, Kazuya Sunto-gun, JP 17 263

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