講演情報
[19p-C501-2]High-throughput analysis of compositional dependent magnetoresistance and spin-transfer torque in combinatorially sputtered CoxFe1-x (0 ≤ x ≤ 1) thin film
〇(PC)Vineet Barwal1, Hirofumi Suto1, Tomohiro Taniguchi2, Yuya Sakuraba1 (1.NIMS, 2.AIST)
キーワード：
High Throughput Analysis、Magnetoresistance、Spin Transfer Torque Efficiency
We develop a high-throughput method for measuring the composition dependence of magnetoresistance (MR) and spin-transfer-torque (STT) effects in current-perpendicular-to-plane giant magnetoresistance (CPP-GMR) devices and report its application to the CoFe system. We fabricated CPP-GMR devices on a single GMR film consisting of a CoxFe1-x (0 ≤ x ≤ 1) composition-gradient layer a Cu spacer layer, and a NiFe layer. The MR ratio obtained from resistance-field measurements exhibited the maximum in the broad Co concentration range of 0.3 ≤ x ≤ 0.65. The STT efficiency was measured by inducing magnetization reversal of the NiFe layer by spin injection from the CoxFe1-x layer.The large sample size obtained through combinatorial sputtering facilitated comprehensive and efficient analysis, enabling mapping of the composition-property relationship and identify optimal composition of CoFe for spintronic applications.