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Intermediate Valence Behavior of Yb2Ni12P7 Studied by Using 31P NMR
T Koyama,K Sugiura,K Ueda,T Mito,T Kohara,R Satoh,K Tsuchiya,T Nakano,N Takeda 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
The Yb-based heavy-fermion compound Yb2Ni12P7 with a hexagonal Zr2Fe12P7-type crystalstructure was investigated by using the 31P nuclear magnetic resonance (NMR) technique. Thecomplicated NMR line changes its shape gradually with decreasing temperature, implying the presenceof some Knight shift components. The temperature dependences of the Knight shift and thenuclear spin-lattice relaxation rate 1/T1 suggest the delocalization of 4f electrons.
Kobayashi, T.,Ida, K.,Inagaki, S.,Tsuchiya, H.,Tamura, N.,Choe, G.H.,Yun, G.S.,Park, H.K.,Ko, W.H.,Evans, T.E.,Austin, M.E.,Shafer, M.W.,Ono, M.,Ló,pez-bruna, D.,Ochando, M.A.,Estrada, T.,Hidalg IOP 2017 Nuclear fusion. Fusion nucléaire. &n.Illiga Vol.57 No.7
<P>In this contribution we analyze modulation electron cyclotron resonance heating (MECH) experiment and discuss higher harmonic frequency dependence of transport coefficients. We use the bidirectional heat pulse propagation method, in which both inward propagating heat pulse and outward propagating heat pulse are analyzed at a radial range, in order to distinguish frequency dependence of transport coefficients due to hysteresis from that due to other reasons, such as radially dependent transport coefficients, a finite damping term, or boundary effects. The method is applied to MECH experiments performed in various helical and tokamak devices, i.e. Large Helical Device (LHD), TJ-II, Korea Superconducting Tokamak Advanced Research (KSTAR), and Doublet III-D (DIII-D) with different plasma conditions. The frequency dependence of transport coefficients are clearly observed, showing a possibility of existence of transport hysteresis in flux-gradient relation.</P>
Electrostatic Electron Cyclotron Harmonic Waves as a Candidate to Cause Pulsating Auroras
Fukizawa, M.,Sakanoi, T.,Miyoshi, Y.,Hosokawa, K.,Shiokawa, K.,Katoh, Y.,Kazama, Y.,Kumamoto, A.,Tsuchiya, F.,Miyashita, Y.,Tanaka, Y. ‐,M.,Kasahara, Y.,Ozaki, M.,Matsuoka, A.,Matsuda, S.,Hikish American Geophysical Union 2018 Geophysical research letters Vol.45 No.23
Effect of Additive Elements on Electrochemical Behavior of Passive Films on Fe-18Cr Alloy
Fujimoto, S.,Umemura, H.,Kurihara, M.,Tsuchiya, H.,Shibata, T. 한국부식방식학회 2002 Corrosion Science and Technology Vol.31 No.1
Electrochemical behaviour of Fe-18Cr-X (X: Al, Si, Ti, Mn, Ni, Cu, Zr, Nb, Mo, and W, 0.5-4 at.%) alloy thin films deposited on Si wafer by ion beam sputtering technique was examined in order to discuss the effect of alloying elements which are completely dissolved in the alloy. Polarisation curves measured in 0.1 krnol m" H2S04 revealed that active dissolution was suppressed by Ni, Nb, Mo, Cu and Ti, but was almost not affected by Al, Si, Mn. Pitting corrosion resistance in acid chloride solutions was extremely improved by Nb, Mo, Ti. On the other hand, Al, Si, Mn exhibited almost no change in pitting potential. Reactivation in sulphuric acid was suppressed by Mo, Nb, Ni, Ti, but not affected or slightly enhanced by Si and Mn. It is noticeable that addition of Nb is especially beneficial for preventing both pitting corrosion and reactivation. The corrosion behaviour of Fe-Cr alloys are discussed in terms of the stability of passive film which is influenced by minute additives incorporated in the film.