著者

増田 正美

出版者

公益社団法人 日本磁気学会

雑誌

日本応用磁気学会誌 (ISSN:02850192)

巻号頁・発行日

vol.3, no.3, pp.81-88, 1979-08-31 (Released:2010-05-18)

参考文献数

7

著者

窪田 崇秀 児玉 謙司 中村 哲也 桜庭 裕弥 大兼 幹彦 永沼 博 高梨 弘毅 安藤 康夫

出版者

公益社団法人 日本磁気学会

雑誌

Journal of the Magnetics Society of Japan (ISSN:18822924)

巻号頁・発行日

vol.34, no.2, pp.100-106, 2010-03-01 (Released:2010-03-24)

参考文献数

30

被引用文献数

1

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We successfully fabricated L21-ordered Mn2VAl Heusler thin films and evaluated their ferrimagnetic properties by soft x-ray magnetic circular dichroism (XMCD). The buffer layers and annealing temperatures were varied to prepare the Mn2VAl films. We discovered that Mn2VAl could be ordered in an L21 phase well when it was deposited directly onto an MgO (001) single crystalline substrate. The maximum values of L21 and B2 long-range order parameters we obtained were about 0.5 for both phases for samples without a buffer layer, when substrates were heated at 500°C or 600°C. The saturation magnetization (Ms) for these samples was roughly 150 emu/cc. This is rather small compared to that expected from the ideal Slater-Pauling behavior, which might be due to the suppressed degree of L21 or B2 ordering. Ferrimagnetism in the Mn2VAl, ferrimagnetic coupling between Mn and V moments was clearly observed by using the XMCD technique in well-ordered L21-Mn2VAl film as has been predicted in theoretical investigations.

著者

倉田 啓明 白川 究 中島 冶 村上 孝一

出版者

公益社団法人 日本磁気学会

雑誌

日本応用磁気学会誌 (ISSN:02850192)

巻号頁・発行日

vol.17, no.2, pp.537-540, 1993-04-01 (Released:2007-12-03)

参考文献数

5

被引用文献数

1 1

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For miniaturization of magnetic devices, it is necessary to increase the operating frequency. We have studied thin-film micro-inductors to realize a high operating frequency and reduce the iron loss. In this paper, we propose a thin-film micro-transformer with high operating frequency achieved by application of a multilayered magnetic film to the core. The magnetic core is made of amorphous CoFeSiB monolayer film or a CoFeSiB/SiO2 multilayered film. The induced magnetic anisotropy is controlled so that the exciting direction of the coil is along the hard axis. The total thickness of the magnetic layer is 3μm and the size of the core is 0.6 mm × 2.3 mm. The experimental transformers show that a multilayered core is useful for improving the transmission loss of transformers at high operating frequency. A thin-film transformer whose transmission loss is 2.7 dB from 100 MHz to 250 MHz has been developed. This value is smaller than the 5.3 dB of the monolayer core.