[8p-E208-1~18] 10.2 Fundamental and exploratory device technologies for spin

6:00 PM - 6:15 PM JST(9:00 AM - 9:15 AM UTC)English Presentation

[8p-E208-17] Spin-Charge Conversion and Transport Properties of Sputtered Immiscible Cu–W Thin Films

〇Peng Sheng¹ (1.Kitami Inst. of Tech.)

Keywords:

spin Seebeck effect,inverse spin Hall effect,Cu-W thin films

Spin-charge conversion and transport properties were investigated in sputtered immiscible Cu_1-xW_x thin films. The films were prepared by DC magnetron co-sputtering using separate Cu and W targets, and the longitudinal spin Seebeck effect (LSSE) was used to evaluate the inverse spin Hall response in YIG/Cu_1-xW_x structures. X-ray diffraction revealed systematic structural evolution from Cu-rich to W-rich compositions, including an amorphous-like feature in the intermediate composition range and an α-W-related crystalline peak on the W-rich side. The electrical resistivity and LSSE-induced voltage showed clear composition dependences, suggesting that the spin-charge conversion response is closely related to both structural evolution and transport properties. Comparison of these composition dependences suggests that the response cannot be explained solely by amorphization or resistivity enhancement.