講演情報
[15p-PB1-44]Fabrication for printable giant magnetoresistance device with low field sensitivity
〇Soma Miura1, Masamune Taguchi1, Yuichiro Kurokawa1, Hiromi Yuasa1 (1.Kyushu Univ.)
キーワード：
Giant magnetoresistance
Giant magnetoresistance (GMR) devices are actively studied due to their high magnetic-field sensitivity and potential use in wearable devices and rotary encoders. The application of printing technologies to GMR fabrication is attractive because it enables low-cost and large-area device production. In our previous work, printable GMR devices using GMR ink were demonstrated; however, the magnetization switching field of the free layer was shifted by the interlayer coupling field (Hin), limiting the detection of weak magnetic fields. In this study, we examined the effect of free-layer thickness on Hin suppression. GMR inks with different NiFe free-layer thicknesses were fabricated and evaluated. Increasing the free-layer thickness reduced Hin, but also decreased the magnetoresistance (MR) ratio. These results indicate that further approaches are necessary to simultaneously suppress Hin and maintain a high MR ratio in printable GMR devices.