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Article type: Cover
2015 Volume 70 Issue 11 Pages
Cover1-
Published: November 05, 2015
Released on J-STAGE: August 21, 2019
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Shozo Suto
Article type: Article
2015 Volume 70 Issue 11 Pages
809-
Published: November 05, 2015
Released on J-STAGE: August 21, 2019
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Article type: Index
2015 Volume 70 Issue 11 Pages
810-811
Published: November 05, 2015
Released on J-STAGE: August 21, 2019
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Kazuaki Sakoda
Article type: Article
2015 Volume 70 Issue 11 Pages
812-813
Published: November 05, 2015
Released on J-STAGE: August 21, 2019
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Isao H. Inoue
Article type: Article
2015 Volume 70 Issue 11 Pages
814-823
Published: November 05, 2015
Released on J-STAGE: August 21, 2019
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Resistive random access memory (RRAM) is an ideal memory device for the era of "internet of Things" due to its low power consumption, suitability for miniaturization, high speed data processing, and compatibility to CMOS technology. Naively, all the metal/insulator/metal capacitor-like device can work as RRAM by a soft breakdown called electroforming, if it forms a current constriction structure (faucet) or an interface barrier. The importance of those built-in structures is explained in this review. RRAM is classified into four types based on the current-voltage characteristics. They are fuse/antifuse-type (digital type) nonpolar and bipolar RRAMs, memristor-type RRAM, and continuous-type (analog-type) bipolar RRAM. Suggested mechanisms of these four types of RRAM are also reviewed.
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Takehito Hayakawa, Toshitaka Kajino, Satoshi Chiba
Article type: Article
2015 Volume 70 Issue 11 Pages
824-829
Published: November 05, 2015
Released on J-STAGE: August 21, 2019
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The isotope ^<92>Nb decays to ^<92>Zr with a half-life of 34.7 Myr. With analysis of primitive meteorites, the initial abundance ratios for ^<92>Nb/^<93>Nb at the time of solar system formation (SSF) have been measured. The astrophysical origin of this material, however, has remained unknown. We have proposed a novel origin of ^<92>Nb via neutrino-induced reactions in core-collapse supernovae.
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Rina Takashima, Satoshi Fujimoto
Article type: Article
2015 Volume 70 Issue 11 Pages
830-834
Published: November 05, 2015
Released on J-STAGE: August 21, 2019
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We investigate electromagnetic phenomena in the merging process of skyrmions in a chiral magnet, in which monopoles of spin textures are accompanied. We especially focus on the spin-orbit coupling inherent in chiral magnets. The effective electromagnetic field and charge currents induced by the spin dynamics are obtained. We found that the adiabatic dynamics produce a dissipationless current that originates from the spin-orbit coupling. Furthermore, the distribution of the obtained effective electromagnetic field generated by the moving monopole implies that the monopole behaves like a dyon.
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Yohichi Suzuki
Article type: Article
2015 Volume 70 Issue 11 Pages
835-839
Published: November 05, 2015
Released on J-STAGE: August 21, 2019
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We briefly review the recent progress of theoretical framework for analyzing single-molecule rupture kinetics, and shed light to theoretical background of diffusion-limited process on free energy landscape. End-to-end distance of biomolecule is commonly employed as a reaction coordinate of the free energy landscape, however it is not always an adequate coordinate for representing molecular rupture kinetics. We discuss multidimensionality of the free energy landscape and introduce a minimal model which shows the existence of a spectrum of unusual scenario for force dependent lifetime. In this article, we also introduce some experimental results which imply the end-to-end distance is not a good reaction coordinate, and give alternative way to interpret them.
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Takuya Satoh
Article type: Article
2015 Volume 70 Issue 11 Pages
840-844
Published: November 05, 2015
Released on J-STAGE: August 21, 2019
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We demonstrate optical control and detection of three magnetic oscillation modes, where modes and initial phases of the oscillations are independently triggered and measured by tailoring optical polarization states in a pump-probe measurement. Two in-plane modes and an out-of-plane mode are triggered by linearly and circularly polarized light pulses via the inverse Cotton-Mouton effect and the inverse Faraday effect, and detected by circularly and linearly polarized ones via the Cotton-Mouton effect and the Faraday effect, respectively, in a hexagonal antiferromagnet YMnO_3 with three-sublattices. The control and detection represent a bijection of information from polarization of pump pulse to magnetic oscillation and toward polarization of probe pulse. Also, the two-dimensional vector control of magnetic oscillation of YMnO_3 was realized by a pair of optical pulses with different polarizations.
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Takayuki Ohmura, Hideki Shimoi, Yoshihiko Kawai, Tsuyoshi Kodama
Article type: Article
2015 Volume 70 Issue 11 Pages
845-850
Published: November 05, 2015
Released on J-STAGE: August 21, 2019
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Measuring technology that utilizes light to the outermost boundaries is a powerful tool that provides deeper understanding of more sophisticated phenomena. Measurement using light offers unique advantages, for example nondestructive analysis of a substance, high-speed properties and extremely high detectivity. Recently, in particular, such advanced fields as scientific measurement, medical diagnosis and treatment, high energy physics, spectroscopy and biotechnology require development of photodetectors that exhibit the ultimate in various performance parameters. A hundred kinds of PhotoMultiplier Tube (PMT) have been developed using vacuum technologies, and used in various measuring fields mentioned above. We will describe basic principles of PMT and the reason why PMT is still being used in extreme regions.
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[in Japanese]
Article type: Article
2015 Volume 70 Issue 11 Pages
851-854
Published: November 05, 2015
Released on J-STAGE: August 21, 2019
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[in Japanese]
Article type: Article
2015 Volume 70 Issue 11 Pages
855-858
Published: November 05, 2015
Released on J-STAGE: August 21, 2019
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[in Japanese]
Article type: Article
2015 Volume 70 Issue 11 Pages
859-860
Published: November 05, 2015
Released on J-STAGE: August 21, 2019
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[in Japanese]
Article type: Article
2015 Volume 70 Issue 11 Pages
861-
Published: November 05, 2015
Released on J-STAGE: August 21, 2019
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[in Japanese]
Article type: Article
2015 Volume 70 Issue 11 Pages
862-
Published: November 05, 2015
Released on J-STAGE: August 21, 2019
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[in Japanese]
Article type: Article
2015 Volume 70 Issue 11 Pages
862-863
Published: November 05, 2015
Released on J-STAGE: August 21, 2019
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2015 Volume 70 Issue 11 Pages
863-
Published: 2015
Released on J-STAGE: August 21, 2019
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Article type: Appendix
2015 Volume 70 Issue 11 Pages
864-867
Published: November 05, 2015
Released on J-STAGE: August 21, 2019
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Article type: Appendix
2015 Volume 70 Issue 11 Pages
867-868
Published: November 05, 2015
Released on J-STAGE: August 21, 2019
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[in Japanese]
Article type: Appendix
2015 Volume 70 Issue 11 Pages
868-
Published: November 05, 2015
Released on J-STAGE: August 21, 2019
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Article type: Appendix
2015 Volume 70 Issue 11 Pages
869-
Published: November 05, 2015
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Article type: Appendix
2015 Volume 70 Issue 11 Pages
870-895
Published: November 05, 2015
Released on J-STAGE: August 21, 2019
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Article type: Appendix
2015 Volume 70 Issue 11 Pages
896-
Published: November 05, 2015
Released on J-STAGE: August 21, 2019
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