76 Papers
331 Citations
Koji Ando is an academic researcher from National Institute of Advanced Industrial Science and Technology. The author has contributed to research in topics: Magnetization & Magnetoresistance. The author has an hindex of 24, co-authored 76 publications. Previous affiliations of Koji Ando include Toshiba.
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Papers
Giant tunneling magnetoresistance up to 410% at room temperature in fully epitaxial Co∕MgO∕Co magnetic tunnel junctions with bcc Co(001) electrodes
TL;DR: Fully epitaxial Co(001)∕MgO(001),∕Co(001)-magnetic tunnel junctions (MTJ) with metastable bcc Co (001) electrodes were fabricated with molecular beam epitaxy.
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Spin dice: A scalable truly random number generator based on spintronics
TL;DR: Generation of practical random numbers (RNs) by a spintronics-based, scalable truly RN generator called "spin dice" was demonstrated and the RNs obtained by performing a nested XOR operation passed the statistical test of NIST SP-800 with the appropriate pass rate.
242
Giant tunneling magnetoresistance in fully epitaxial body-centered-cubic Co∕MgO∕Fe magnetic tunnel junctions
Shinji Yuasa,Toshikazu Katayama,Taro Nagahama,Akio Fukushima,Hitoshi Kubota,Yoshishige Suzuki,Koji Ando +6 more
TL;DR: In this paper, the magnetoresistance (MR) ratio of bcc Co(001) and bcc Fe0.5Co(1) electrodes was shown to be much higher than that for a bccFe electrode, indicating the importance of electrode band structure in the k ǫ = 0 direction.
82
Large spin accumulation voltages in epitaxial M n 5 G e 3 contacts on Ge without an oxide tunnel barrier
TL;DR: In this article, a three-terminal Hanle effect measurement was performed on a high-quality epitaxial Schottky contacts on $n$-type Ge and the observed spin voltage was several orders of magnitude larger than predicted by the theory of spin injection and diffusive spin transport.
50
Optical Isolator Utilizing Surface Plasmons
TL;DR: The linear dispersion relation was derived for plasmons propagating in a multilayer magneto-optical slab for a competitive plasmonic isolator, which benefits from a broad wavelength operational bandwidth and a good technological compatibility for integration into the Photonic Integrated Circuits.
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