The University of Osaka · Physics and Astronomy
Professor Teruo Ono's research lab specializes in nanoscale magnetism and spintronics, focusing on the electrical and magnetic properties of submicrometer and nanoscale magnetic structures. The lab investigates phenomena such as magnetic domain wall dynamics, spin-dependent electron transport, and giant magnetoresistance effects in nanowires, aiming to understand and control nanoscale spintronic devices. A key direction involves exploiting magnetic domain walls for novel electronic functionalities, including quantized conductance switching and colossal magnetoresistive sensing. The lab also explores the interplay between magnetic order and electronic transport at the nanoscale, with applications in next-generation memory and sensor technologies.
Figures are computed from collected data and may differ slightly.
The motion of a magnetic domain wall in a submicrometer magnetic wire was detected by use of the giant magnetoresistance effect. Magnetization reversal in a submicrometer magnetic wire takes place by the propagation of a magnetic domain wall, which can be treated as a "particle." The propagation velocity of the magnetic domain wall was determined as a function of the applied magnetic field.
The microsomal enzyme system from rat liver which catalyzes squalene epoxidation requires a supernatant protein and phospholipids (Tai, H., and Bloch, K. (1972) J. Biol. Chem. 247, 3767). It has now been found that these two cytoplasmic components can be replaced by Triton X-100. The same detergent solubilizes the microsomal squalene epoxidase and the resulting supernatant can be separated into two components, A and B, by DEAE-cellulose chromatography. Neither Fraction A nor B alone has signific
We demonstrate the electrical conductance quantization in a Ni nanowire formed in a break junction between a ferromagnetic Ni wire and a Ni plate in applied magnetic fields. The conductance of the nanowire is clearly quantized in units of 2e2/h in a zero magnetic field, but it is switched to e2/h by applying magnetic fields above 60 Oe. This switching behavior seems closely related to a ferromagnetic domain formation in the vicinity of a nanowire, suggesting that nanoscale magnetic domain walls
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