Takuo Ohkochi

TL;DR: In this article, the magnetic moments in NiO, a typical natural antiferromagnet, can indeed be controlled by the spin torque with a relatively small electric current density (~4××107'A/cm2) and their orientation is detected by the transverse resistance resulting from the spin Hall magnetoresistance.

TL;DR: In this paper, severe plastic deformation using high pressure torsion (HPT) is employed for the production of the L10 structure in the laboratory and its formation is confirmed by X-ray diffraction analysis and transmission electron microscopy.

TL;DR: In this paper, the magnetism can be tuned by in-plane strain in epitaxial SrCoO x (oxygen deficient) thin films by pulsed laser deposition and magnetization measurements reveal that the specific substrate strain suppresses the ferromagnetism found in the corresponding bulk material.

TL;DR: In this article, the electronic structure of Zn$0.9}$Fe$ 0.1}$O nano-particles was studied and it was shown that the room temperature ferromagnetism in the Zn $ 0.9]$Fe $ 0.1}O nanoparticles is primarily originated from the antiferromagnetic coupling between unequal amounts of Fe$^{3+}$ ions occupying two sets of nonequivalent positions in the region of the XMCD probing depth.

TL;DR: In this article, the electronic structure of Fe-doped ZnO nanoparticles was studied and it was shown that Fe atoms are predominantly in the Fe3+ ionic state with mixture of a small amount of Fe2+ and that Fe 3+ ions are dominant in the surface region of the nanoparticles.