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Fujimori, Shinichi; Kobata, Masaaki; Takeda, Yukiharu; Okane, Tetsuo; Saito, Yuji; Fujimori, Atsushi*; Yamagami, Hiroshi; Haga, Yoshinori; Yamamoto, Etsuji; Onuki, Yoshichika*
no journal, ,
no abstracts in English
Kubo, Katsunori; Onishi, Hiroaki
no journal, ,
no abstracts in English
Metoki, Naoto; Yamauchi, Hiroki; Watanuki, Ryuta*; Suzuki, Kazuya*; Hagihara, Masato*; Masuda, Takatsugu*; Matsuda, Masaaki*; Songxue, C.*; Fernandez Baca, J.*
no journal, ,
Our neutron scattering study and using representational analysis revealed the magnetic structure in phase II of NdB with Shastry-Sutherland lattice. We found that the magnetic structure is described by the mixture of the basis vector of 
and 
representation with the magnetic moment of about 2
. We observed pseudo-quartet CEF state and the temperature dependence by means of neutron inelastic scattering below 5 meV.
Fukaya, Yuki
no journal, ,
no abstracts in English
Fukaya, Yuki; Entani, Shiro*; Sakai, Seiji*; Mochizuki, Izumi*; Hyodo, Toshio*; Shamoto, Shinichi
no journal, ,
no abstracts in English
RhSiYamauchi, Hiroki; Shamoto, Shinichi; Kondo, Keietsu; Ishikado, Motoyuki*; Hagihara, Masato*; Fernandez-Baca, J. A.*
no journal, ,
no abstracts in English
Fe
O
Shamoto, Shinichi; Matsuura, Masato*; Akatsu, Mitsuhiro*; Ito, Takashi; Mori, Michiyasu; Kajimoto, Ryoichi; Kawamura, Seiko; Shibata, Kaoru; Nemoto, Yuichi*; Maekawa, Sadamichi
no journal, ,
no abstracts in English
Kumada, Takayuki; Noda, Yohei*; Ishikawa, Norito
no journal, ,
We compared dynamic nuclear polarization (DNP) behavior of electron-beam irradiated and TEMPO-doped polymers. Growth and decay rates of nuclear polarization of e-PE increased linearly with increasing radical concentration, whereas those of T-PS increased with square of the radical concentration. From these results, we suggest that the pair of alkyl radicals produced by the radiolysis and the subsequent hydrogen abstraction reaction in e-PE plays an important role on DNP, whereas T-PS is polarized by a pair of unspecified TEMPO accidentally located nearby. We propose that higher polarization would be expected by optimizing the inter-radical distance within the pair in e-PE and other irradiated samples.
Tateiwa, Naoyuki; Haga, Yoshinori; Yamamoto, Etsuji
no journal, ,
Uranium ferromagnetic compounds show interesting physical properties such as the co-existence of the superconductivity and the ferromagnetism in UGe
. We have developed a miniature high pressure cell (mCAC) for magnetic measurements under high pressure in order to investigate the uranium ferromagnetic system. In this presentation, we will show results of our study on UGe. UGe transforms from the ferromagnetic ground state to the paramagnetic one at around 
1.5 GPa. It is found from measurements with the mCAC that the magnetic susceptibility shows broad maximum at 
in the paramagnetic region above . Correspondingly, the magnetization shows metamagnetic transition at low temperatures. Similar phenomena have been observed in MnSi and been interpreted as the effect on the negative mode-mode coupling among spin fluctuations from the SCR theory. We will present results of the analysis with the theory in this meeting.
Yoneda, Yasuhiro; Kobune, Masafumi*; Wada, Satoshi*; Fu, D.*
no journal, ,
NaNbO shows a complex phase transition sequence. The average structure transformed from an orthorhombic to rhombohedral structure at the phase transition temperature. This phase transition has been found to be diffuse and the orthorhombic and rhombohedral phases coexist at wide temperature ranges. The origin of the diffuse phase transition should be the randomness of the local structure. We performed atomic-pair distribution function analysis by using NaNbO samples grown by various synthesis method to clarify the relationship between the local structure and the phase transition. We demonstrated that the off-center shift of Nb atoms from the center on NbO
ocrahedra coupled with the rhombohedral to orthorhombic phase transition.
Yokota, Terufumi
no journal, ,
no abstracts in English
Ieda, Junichi; Yamane, Yuta*; Sinova, J.*
no journal, ,
Recently, spintronics phenomena in antiferromagnets (AFM) attract attention. Especially spin transfer torque (STT) and spinmotive force (SMF) that have been established and play principal roles in ferromagnets become important subjects since they enable us to control and detect AFM dynamics. A few approaches have been theoretically proposed for treating these effects in AFMs but they are still under debate. In this work, we theoretically investigate SMF due to AFM dynamics by incorporating the finite canting between sublattice magnetizations, non-adiabaticity of the electron dynamics, and the Rashba spin-orbit interaction, which were all omitted in previous work. We show that the electric voltages can be generated by field-induced AFM domain wall motion and AFM resonance. This finding is useful as providing an electrical detection method of AFM dynamics and opens up the possibility of materials search for the larger SMF signals.
Xu, Z.; Gu, B.; Mori, Michiyasu; Maekawa, Sadamichi
no journal, ,
no abstracts in English
Harii, Kazuya; Seo, Y.-J.*; Shiomi, Yuki*; Matsuo, Mamoru; Chudo, Hiroyuki; Maekawa, Sadamichi; Saito, Eiji
no journal, ,
no abstracts in English
As and BaZnSbGu, B.; Maekawa, Sadamichi
no journal, ,
Mori, Michiyasu
no journal, ,
no abstracts in English
Sakai, Hironori; Hattori, Taisuke; Tokunaga, Yo; Kambe, Shinsaku; Shimoda, Aiko*; Waki, Takeshi*; Tabata, Yoshikazu*; Nakamura, Hiroyuki*
no journal, ,
Fe and 
Co NMR spectra have been observed for La-Co co-substituted M-type Ferrite. We will microscopically discuss about the Co sites in the co-substituted M-type Ferrite as well as spin and charge states of Co ions.
Si NMR knight shift measurement on single crystalline URuSiHattori, Taisuke; Sakai, Hironori; Tokunaga, Yo; Kambe, Shinsaku; Matsuda, Tatsuma*; Haga, Yoshinori
no journal, ,
In URuSi, superconductivity occurs at 1.5 K under so-called "hidden order" phase with the transition temperature of 
17.5 K. It is very interesting problem to investigate the detail of the superconducting (SC) state in the "hidden order" phase and the relationship between the superconductivity and the "hidden order". Therefore we have performed NMR measurements on single crystalline URuSi. The last time, we reported the no detectable change in in-plane Si Knight shift in the superconducting state of URuSi. In this time, we will report the Si Knight shift with the field along the magnetic easy axis (c axis), and discuss the pairing symmetry of the superconducting state.
Tokunaga, Yo; Nakamura, Ai*; Aoki, Dai*; Hattori, Taisuke; Sakai, Hironori; Kambe, Shinsaku; Honda, Fuminori*; Homma, Yoshiya*; Li, D.*; Shimizu, Yusei*
no journal, ,
Uranium (U) based heavy fermion compounds, UGe, UCoGe, and URhGe are the only fully established examples of ferromagnetic superconductors in which uniform superconductivity exists deep inside of the FM state. UPtGe has the same crystal structure with URhGe and UCoGe and shows an antiferromagnetic ordering below 
= 51 K where the ordered moments of U-moments are 1.11.4. We will present the result of our new Pt-NMR study on this compound and discuss the anisotropy of the spin fluctuations in UCoGe, URhGe and UPtGe.
Onishi, Hiroaki
no journal, ,
no abstracts in English