@article{oai:jaxa.repo.nii.ac.jp:00032453,
 author = {瀬戸, 正弘 and 早坂, 孝 and 斎藤, 尚生 and 桜井, 享 and 田村, 忠義 and 湯元, 清文 and 佐々木, 徹 and SETO, Masahiro and HAYASAKA, Takashi and SAITO, Takao and SAKURAI, Tohru and TAMURA, Tadayoshi and YUMOTO, Kiyohumi and SASAKI, Tohru},
 issue = {4_B},
 journal = {東京大学宇宙航空研究所報告},
 month = {Dec},
 note = {Both resolution and sensitivity of a fluxgate magnetometer is theoretically expected to be improved if dimension ratio of its biaxial core is increased. Based on this theoretical expectation we manufctured a biaxial 6-81 Mo permalloy core with a dimension ratio of as high as l/d = 2.0 × 10^3, where length l = 500 mm, thickness h = 10 μm, width w = 5 mm, and d = 2 &radic; h・w/π. A drive current applied on the core with a 1-kHz frequency makes a 2-kHz pick-up current which is amplified and phase-detected. The output voltage from the phase detector stands for the magnetic field strength along the core axis. Geomagnetic field variations are recorded by this 50-cm biaxial magnetometer at the Onagawa Magnetic Observatory of Tohoku University and compared with those recorded simultaneously by another commercial biaxial magnetometer. It is concluded that this 50-cm biaxial one is very excellent magnetometer with resolution of 10^<-2> nT (100 times better than the commercial type) and with sensitivity of 10 mV/nT (～100 times better)., 資料番号: SA0125706000},
 pages = {1267--1275},
 title = {<論文>50cm長BIAXIAL型-CORE型FLUXGATE磁力計の製作},
 volume = {14},
 year = {1978}
}