Spin injection effect in thin Bi2212 single crystal

29th International Symposium on Superconductivity

Murata, Kenichiro^1 ; Otaka, Kazuto^2 ; Yamaki, Kazuhiro^1,2 ; Irie, Akinobu^1,2

Department of Innovation Systems Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya

321-8585, Japan^1

Department of Electrical and Electronic Systems Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya

321-8585, Japan^2

关键词: Bi-2212 single crystals;    Bi2Sr2CaCu2Oy;    Magnetic field dependences;    Spin injection;    Terminal method;    Transport measurements;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/871/1/012013/pdf
DOI  :  10.1088/1742-6596/871/1/012013

来源: IOP

【 摘 要 】

The influence of spin-injection on the in-plane transport properties of thin Bi2Sr2CaCu2Oy(BSCCO) single crystal has been investigated. The in-plane transport measurements without and with spin injection were carried out at 77 K by four terminal method. The in-plane critical current was strongly reduced by injecting the current from Co/Au electrodes formed on the BSCCO bridge with 50 mm wide and 450 nm thick. Furthermore, it was observed that magnetic field dependence of the magnetoresistance shows a hysteresis loop. These results indicate that the in-plane superconductive transport property is affected by the spin-injection related to the magnetization of Co.