Zobrazeno 1 - 10
of 106
pro vyhledávání: '"Motofumi Homma"'
Publikováno v:
Journal of the Japan Society of Powder and Powder Metallurgy. 50:58-62
Microwave radiation in the GHz band is increasingly being used in many various communication devices. However, this has brought about the problems of electromagnetic interference (EMI). Now M-type Ba ferrite is expected to be used as a powerful count
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::972ba417f0b89bb697a6953e539a9422
https://doi.org/10.2497/jjspm.50.58
https://doi.org/10.2497/jjspm.50.58
Autor:
Toshio Kagotani, R Sato, Y Houjou, Hiroyasu Ota, Koichiro Inomata, Satoshi Sugimoto, Toru Maeda, David Book, Motofumi Homma
Publikováno v:
Journal of Alloys and Compounds. :301-306
In this study, the possibility of using the disproportionation reaction of the Sm 2 Fe 17 compound for the production of powders with a fine α-Fe structure was investigated, for use as electromagnetic wave absorbers that can operate in the GHz frequ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fb11761bc23cdb6f2d8d8c73347379e3
https://doi.org/10.1016/s0925-8388(01)01504-3
https://doi.org/10.1016/s0925-8388(01)01504-3
Autor:
Toshio Kagotani, Masuo Okada, David Book, Koichiro Inomata, S. Sugimoto, Motofumi Homma, N. Koike
Publikováno v:
Journal of Alloys and Compounds. :892-896
The magnetic properties of Nd12.2Fe81.8B6.0 alloys processed using a new HDDR (hydrogenation disproportionation desorption recombination) treatment were investigated. This newly proposed HDDR treatment is a combination of heat treatments at hydrogen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::406901e3e6d3745362c2c6ad5f7e3360
https://doi.org/10.1016/s0925-8388(01)01503-1
https://doi.org/10.1016/s0925-8388(01)01503-1
Publikováno v:
Materials Transactions, JIM. 41:1150-1153
We have observed superparamagnetic behaviors and giant magnetoresistance in Ni 3 Mn alloy annealed at 673 and 693 K for several periods. The coercive force is small of 0.14 ∼ 0.44 kA.m -1 in these inhomogeneous alloys. The average size of the ferro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23026a253496d3acede84d012c25a0a8
https://doi.org/10.2320/matertrans1989.41.1150
https://doi.org/10.2320/matertrans1989.41.1150
Autor:
Hiroyasu Ota, Hiroyuki Takabayashi, S. Sugimoto, Motofumi Homma, Yuji Houjou, Yoshihiro Kato, Toshio Kagotani, David Book
Publikováno v:
Materials Transactions, JIM. 41:1184-1187
This paper describes the effect of crystal orientation on the electromagnetic wave absorption properties of barium M-type (Ba-M) ferrite. in which Fe 3+ was substituted by (Ti 0.5 Mn 0.5 ) 3+ . The BaFe 9 (Ti 0.5 Mn 0.5 ) 3 O 19 sintered samples were
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::86bda6fff3ec22d568bb6ac22f4195f2
https://doi.org/10.2320/matertrans1989.41.1184
https://doi.org/10.2320/matertrans1989.41.1184
Autor:
Motofumi Homma, Toru Maeda, Hiroyasu Ota, Satoshi Sugimoto, Toshio Kagotani, David Book, Yuji Houjou
Publikováno v:
Materials Transactions, JIM. 41:1172-1175
The electromagnetic wave absorption properties of a magnetic powder with a fine α-Fe structure, produced by the disproportionation of Sm 2 Fe 17 , were investigated in the GHz frequency range. A fine, sub-micrometre α-Fe/SmH 2 structure was formed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aeb23c5dd96976518434f131031284e2
https://doi.org/10.2320/matertrans1989.41.1172
https://doi.org/10.2320/matertrans1989.41.1172
Autor:
David Book, S. Sugimoto, Y. Maeda, Hiroyasu Ota, Toshio Kagotani, M. Kimura, Motofumi Homma, H. Nakamura
Publikováno v:
Journal of the Magnetics Society of Japan. 24:895-898
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::33ac4ee4fe38465691b1b618cc3a4f0b
https://doi.org/10.3379/jmsjmag.24.895
https://doi.org/10.3379/jmsjmag.24.895
Autor:
Motofumi Homma, Hiroyasu Ota, Yoshiaki Maeda, Hajime Nakamura, Toshio Kagotani, S. Sugimoto, David Book, Masashi Kimura
Publikováno v:
Materials Transactions, JIM. 41:567-570
The electromagnetic wave absorption properties of BaZn 2x Fe 10.8+4x (Sn 0.5 Mn 0.5 ) 1.2 O 19+8x (x = 0.25 ∼ 0.75) sintered bodies, consisting of BaM and BaZn 2 W-type hexaferrite phases, were studied. The relative complex permittivity values hard
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d11a3b186b815a484ff3d97a4d4e2edb
https://doi.org/10.2320/matertrans1989.41.567
https://doi.org/10.2320/matertrans1989.41.567
Publikováno v:
Journal of Alloys and Compounds. :862-867
The magnetic properties of HDDR (hydrogenation disproportionation desorption recombination) treated Nd 12.2 Fe 81.8 B 6.0 alloys were investigated. Two different patterns were used for the disproportionation stage: (i) the alloys were heated to a cer
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::48c39d3559a046c2e858222c7d384b2e
https://doi.org/10.1016/s0925-8388(99)00376-x
https://doi.org/10.1016/s0925-8388(99)00376-x
Autor:
Motofumi Homma, Hiroyasu Ota, Masafumi Kimura, Katsumi Okayama, Toshio Kagotani, David Book, Toru Maeda, Yoshiaki Maeda, Satoshi Sugimoto, Hajime Nakamura
Publikováno v:
Materials Transactions, JIM. 40:887-890
The compositional dependence of the electromagnetic wave absorption properties of Barium M-type ferrite, in which a mixture of Ti and Mn were substituted for Fe, was investigated. Single phase M-type structure was obtained for the BaFe 12-x-y Ti x Mn
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::046c3fb01187fa8a76cfbab84ad5d98c
https://doi.org/10.2320/matertrans1989.40.887
https://doi.org/10.2320/matertrans1989.40.887