5diridium oxide as a material for spin-current detection

Kohei Fujiwara, Yasuhiro Fukuma, Jobu Matsuno, Hiroshi Idzuchi, Yasuhiro Niimi, Yoshichika Otani, Hidenori Takagi

Research output: Contribution to journalArticlepeer-review

100 Citations (Scopus)


Devices based on pure spin currents have been attracting increasing attention as key ingredients for low-dissipation electronics. To integrate such spintronics devices into charge-based technologies, electric detection of spin currents is essential. The inverse spin Hall effect converts a spin current into an electric voltage through spin-orbit coupling. Noble metals such as Pt and Pd, and also Cu-based alloys, have been regarded as potential materials for a spin-current injector, owing to the large direct spin Hall effect. Their spin Hall resistivity ρ SH, representing the performance as a detector, is not large enough, however, due mainly because of their low charge resistivity. Here we report that a binary 5d transition metal oxide, iridium oxide, overcomes the limitations encountered in noble metals and Cu-based alloys and shows a very large ρ SH ∼38 μΩ cm at room temperature.

Original languageEnglish
Article number2893
JournalNature Communications
Publication statusPublished - 2013 Dec 11


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