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Lessux, G. G.*; Sakai, Hironori; Hattori, Taisuke*; Tokunaga, Yo; Kambe, Shinsaku; Kuhns, P. L.*; Reyes, A. P.*; Thompson, J. D.*; Pagliuso, P. G.*; Urbano, R. R.*
Physical Review B, 101(16), p.165111_1 - 165111_6, 2020/04
Times Cited Count：11 Percentile：43.79(Materials Science, Multidisciplinary)CeRhIn
is a Kondo-lattice prototype in which a magnetic field 
31T induces an abrupt Fermi-surface (FS) reconstruction and pronounced in-plane electrical transport anisotropy all within its antiferromagnetic state. Here we report low-temperature nuclear magnetic resonance (NMR) measurements revealing a pronounced decrease in the 
In formal Knight shift, without changes in crystal or magnetic structures, of CeRhIn at fields (
) spanning . We discuss the emergent state above in terms of a change in Ce's 4
orbitals that arises from field-induced evolution of crystal-electric field (CEF) energy levels. This change in orbital character enhances hybridization between the 4 and the conduction electrons that leads ultimately to an itinerant quantum-critical point at 
50T.
Haneklaus, N.*; Reyes, R.*; Lim, W. G.*; Tabora, E. U.*; Palattao, B. L.*; Petrache, C.*; Vargas, E. P.*; Kunitomi, Kazuhiko; Ohashi, Hirofumi; Sakaba, Nariaki; et al.
Philippine Journal of Science, 144(1), p.69 - 79, 2015/06
The Philippines may profit from extracting uranium (U) from phosphoric acid during fertilizer production in a way that the recovered U can be beneficiated and taken as raw material for nuclear reactor fuel. Used in a high temperature reactor (HTR) that provides electricity and/or process heat for fertilizer processing and U extraction, energy-neutral fertilizer production, an idea first proposed by Haneklaus et al., is possible. This paper presents a first case study of the concept regarding a representative phosphate fertilizer plant in the Philippines and exemplary HTR designs (HTR50S and GTHTR300C) developed by the Japan Atomic Energy Agency (JAEA). Three different arrangements (version I-III), ranging from basic electricity supply to overall power supply including on site hydrogen production for ammonia conversion, are introduced and discussed.
Si; High magnetic field nuclear magnetic resonance to 40 TSakai, Hironori; Urbano, R. R.*; Tokunaga, Yo; Kambe, Shinsaku; Suzuki, Michito; Kuhns, P. L.*; Reyes, A. P.*; Tobash, P. H.*; Ronning, F.*; Bauer, E. D.*; et al.
Physical Review Letters, 112(23), p.236401_1 - 236401_5, 2014/06
Times Cited Count：7 Percentile：46.00(Physics, Multidisciplinary)Very high field 
Si-NMR measurements using a fully Si-enriched URuSi single crystal were carried out in order to microscopically investigate the "hidden order" (HO) state and adjacent magnetic phases in the high field limit. At the lowest measured temperature of 0.4 K, a clear anomaly reflecting a Fermi surface instability near 22 T inside the HO state is detected by the Si shift, 
. Moreover, a strong enhancement of develops near a critical field 
T, and the Si-NMR signal disappears suddenly at 
, indicating the total suppression of the HO state. Nevertheless, a weak and shifted Si-NMR signal reappears for fields higher than at 4.2 K, providing evidence for a magnetic structure within the magnetic phase caused by the Ising-type anisotropy of the uranium ordered moments.
Bauer, E. D.*; Yang, Y.-F.*; Capan, C.*; Urbano, R. R.*; Miclea, C. F.*; Sakai, Hironori; Ronning, F.*; Graf, M. J.*; Balatsky, A. V.*; Movshovich, R.*; et al.
Proceedings of the National Academy of Sciences of the United States of America, 108(17), p.6857 - 6861, 2011/04
Times Cited Count：41 Percentile：82.32(Multidisciplinary Sciences)Here, we report a manifestation of electronic inhomogeneity in a strongly correlated -electron system, using CeCoIn as an example. A thermodynamic analysis of its superconductivity, combined with nuclear quadrupole resonance measurements, shows that nonmagnetic impurities (Y, La, Yb, Th, Hg, and Sn) locally suppress unconventional superconductivity, generating an inhomogeneous electronic "Swiss cheese" due to disrupted periodicity of the Kondo lattice. Our analysis may be generalized to include related systems, suggesting that electronic inhomogeneity should be considered broadly in Kondo lattice materials.
Si-NMR study of URuSiSakai, Hironori; Tokunaga, Yo; Kambe, Shinsaku; Urbano, R. R.*; Kuhns, P. L.*; Reyes, A. P.*; Ronning, F.*; Bauer, E. D.*; Thompson, J. D.*
no journal, ,
The heavy fermion superconductor URuSi with 
K shows the "hidden order" at 
K. Below 1 K, it shows a first-order-transition at 
T from the hidden order phase to the magnetically ordered phase. The 
-
phase diagram for URuSi above 35 T is known to be complicated but the details in the each phase above 35 T are unknown. We have been investigating the electronic state by means of Si-NMR in the higher field. The NMR experiment was done at National High Magnetic Field Laboratory (Tallahassee, FL, U.S.A.).
SiSakai, Hironori; Urbano, R. R.*; Tokunaga, Yo; Kambe, Shinsaku; Kuhns, P. L.*; Reyes, A. P.*; Ronning, F.*; Bauer, E. D.*; Thompson, J. D.*
no journal, ,
In order to microscopically investigate what happens around 
22 T and just above 36 T in the lowest temperature, we have performed Si-NMR shift measurement using a Si-fully-enriched single crystal of URuSi. We have found a shift anomaly around 22 T and a critical increase toward 36 T, corresponding to a slight change of total density of states (DOS) at 22 T and increase of DOS toward 36 T. Although the Si-NMR signal was lost by field sweeping just above 36 T at the lowest temperature, the Si-NMR spectrum has been successfully obtained at 4.2 K in the magnetic phase just above 36 T. From the spectral shape, we will discuss a possible magnetic structure in the magnetic phase.
S-NMR study for a narrow-gap semiconductor 
-USSakai, Hironori; Higa, Nonoka; Hattori, Taisuke; Tokunaga, Yo; Kambe, Shinsaku; Tateiwa, Naoyuki; Haga, Yoshinori; Rossa, P. F. S.*; Thompson, J. D.*; Ronning, F.*; et al.
no journal, ,
-US is known as a narrow-gap semiconductor. The magnetoresistance in this compound is extremely large but anisotropic. To obtain microscopic view of the magnetism, we have carried on S-NMR study. We will discuss the magnetic properties in this system to show the recent NMR results.
