Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Al
and Nd
Pd
Ge
Metoki, Naoto; Shibata, Kaoru; Matsuura, Masato*; Kitazawa, Hideaki*; Suzuki, Hiroyuki*; Yamauchi, Hiroki; Hagihara, Masato; Frontzek, M. D.*; Matsuda, Masaaki*
Journal of the Physical Society of Japan, 91(5), p.054710_1 - 054710_6, 2022/05
Times Cited Count：0 Percentile：0(Physics, Multidisciplinary)Hyperfine splitting of Nd nuclei in NdPdAl has been studied by means of high-resolution neutron spectroscopy. We observed inelastic peaks at 
eV coming from the hyperfine splitting in the magnetically ordered phase due to the hyperfine interactions between Nd nuclei (
=7/2) and the 4
electrons with 
ground state composed of mainly 
. At very low temperatures, nuclear spin of Nd is polarized with increasing occupation probability of low energy levels and contributes to the enhancement of the antiferromagnetic Bragg intensities: the elastic non-spin-flip channel is dominant. As an application of this phenomenon, we determined the Nd moment and hyperfine splitting from the temperature dependence of an antiferromagnetic Bragg intensities for NdPdGe.
Kuroda, Kenta*; Arai, Yosuke*; Rezaei, N.*; Kunisada, So*; Sakuragi, Shunsuke*; Alaei, M.*; Kinoshita, Yuto*; Bareille, C.*; Noguchi, Ryo*; Nakayama, Mitsuhiro*; et al.
Nature Communications (Internet), 11, p.2888_1 - 2888_9, 2020/06
Times Cited Count：20 Percentile：75.49(Multidisciplinary Sciences)-electron state of the heavy fermion superconductor NpPdAl and the isostructural familyMetoki, Naoto; Aczel, A. A.*; Aoki, Dai*; Chi, S.*; Fernandez-Baca, J. A.*; Griveau, J.-C.*; Hagihara, Masato*; Hong, T.*; Haga, Yoshinori; Ikeuchi, Kazuhiko*; et al.
JPS Conference Proceedings (Internet), 30, p.011123_1 - 011123_6, 2020/03
Rare earths (4) and actinides (5) provide variety of interesting states realized with competing interactions between the increasing number of electrons. Since crystal field splitting of many-body electron system is smaller than the bandwidth, (1) high resolution experiments are needed, (2) essentially no clear spectrum with well defined peaks is expected in itinerant Ce and U compounds, and (3) Np and Pu is strictly regulated. Therefore, systematic research on magnetic excitations by neutron scattering experiments of localized compounds and rare earth iso-structural reference is useful. We describe the electron states of heavy electron compounds NpPdAl and actinide and rare earth based iso-structural family.
-electron states in PrPdAlMetoki, Naoto; Yamauchi, Hiroki; Suzuki, Hiroyuki*; Kitazawa, Hideaki*; Hagihara, Masato*; Masuda, Takatsugu*; Aczel, A. A.*; Chi, S.*; Hong, T.*; Matsuda, Masaaki*; et al.
Journal of the Physical Society of Japan, 87(9), p.094704_1 - 094704_8, 2018/09
Times Cited Count：6 Percentile：46.54(Physics, Multidisciplinary)The -electron states of PrPdAl were revealed by neutron inelastic scattering. The flat -orbitals with large 
become stable under the two-dimensional CEF potential of unique crystal structure, which is the origin of the Ising anisotropy. A systematic understanding is possible in RPdAl based on this CEF potential. Especially the 
-type anisotropy in NpPdAl can be qualitatively understood with the positive Stevens factors. It mean that the local property is important for the physical properties of RPdAl including the heavy fermion superconductivity in NpPdAl.
AlMetoki, Naoto; Yamauchi, Hiroki; Kitazawa, Hideaki*; Suzuki, Hiroyuki*; Hagihara, Masato*; Frontzek, M. D.*; Matsuda, Masaaki*; Fernandez-Baca, J. A.*
Journal of the Physical Society of Japan, 86(3), p.034710_1 - 034710_5, 2017/03
Times Cited Count：9 Percentile：56.98(Physics, Multidisciplinary)Magnetic structure of NdPdAl has been studied by means of neutron powder diffraction. We observed remarkable magnetic reflections with the modulation vector 
= (1/2 0 0) below the ordering temperature 
= 1.2 K. We found a collinear magnetic structure of Nd moment of 2.9(1) 
at 0.3 K parallel to the 
-axis, where the ferromagnetically ordered 
planes stack with four Nd layer period of ++-- sequence along the direction with the distance between adjuscent Nd layers to be 
. This is very similar to CePdAl with = (0.23 0.23 0) and the Ce moment parallel to the -axis. These structures with in-plane modulation 
is a consequence of the two dimensional nature of fermi surface topology in this family, coming from unique crystal structure with very long tetragonal unit cell and large distance 
7
between the rare earth layers separated by Al and two Pd layers.
Nigo, Seisuke*; Kubota, Masato; Harada, Yoshitomo*; Hirayama, Taisei*; Kato, Seiichi*; Kitazawa, Hideaki*; Kido, Giyu*
Journal of Applied Physics, 112(3), p.033711_1 - 033711_6, 2012/08
Times Cited Count：61 Percentile：89.42(Physics, Applied)Onuma, Masato*; Suzuki, Junichi; Otsuka, Satoshi; Kim, S.-W.; Kaito, Takeji; Inoue, Masaki; Kitazawa, Hideaki*
Acta Materialia, 57(18), p.5571 - 5581, 2009/10
Times Cited Count：117 Percentile：97.23(Materials Science, Multidisciplinary)Matsunami, Noriaki*; Sataka, Masao; Okayasu, Satoru; Ishikawa, Norito; Tazawa, Masato*; Kakiuchida, Hiroshi*
Nuclear Instruments and Methods in Physics Research B, 266(12-13), p.2986 - 2989, 2008/06
Times Cited Count：8 Percentile：50.37(Instruments & Instrumentation)Irradiation effects of Cu
O irradiated with 100 MeV Xe ions were studied. X-ray diffraction intensity and optical properties were analyzed.
Matsunami, Noriaki*; Sataka, Masao; Okayasu, Satoru; Tazawa, Masato*
Nuclear Instruments and Methods in Physics Research B, 256(1), p.333 - 336, 2007/03
Times Cited Count：15 Percentile：70.27(Instruments & Instrumentation)no abstracts in English
Sugai, Hiroyuki; Matsunami, Noriaki*; Fukuoka, Osamu*; Sataka, Masao; Kato, Teruo; Okayasu, Satoru; Shimura, Tetsuo*; Tazawa, Masato*
Nuclear Instruments and Methods in Physics Research B, 250(1-2), p.291 - 294, 2006/09
Times Cited Count：15 Percentile：70.56(Instruments & Instrumentation)We have investigated the effects on electrical properties of Al-doped ZnO (AZO) semiconductor films induced by high-energy heavy ion. The AZO films with c-axis on SiO glass substrate were prepared by a RF-sputter-deposition method at 400 
C. Rutherford backscattering spectroscopy shows that the Al/Zn composition and the film thickness are 4 % and 0.3 
m. We find that the conductivity monotonically increases from 1.5
10
to 810 S/cm with increasing the fluence up to 410
/cm, as already been observed for 100 keV Ne irradiation. The fluence of 100 keV Ne at which the conductivity takes its maximum is 310
/cm (7 dpa). The dpa of 100 MeV Xe at 410/cm is estimated as 0.008. Hence, the conductivity increase by 100 MeV Xe ion is ascribed to the electronic excitation effects.
Fukuoka, Osamu*; Matsunami, Noriaki*; Tazawa, Masato*; Shimura, Tetsuo*; Sataka, Masao; Sugai, Hiroyuki; Okayasu, Satoru
Nuclear Instruments and Methods in Physics Research B, 250(1-2), p.295 - 299, 2006/09
Times Cited Count：24 Percentile：83(Instruments & Instrumentation)We have investigated the effects on electrical and optical properties of Al-doped ZnO (AZO) semiconductor films induced by high-energy heavy ion. The AZO films with c-axis on SiO glass substrate were prepared by a RF-sputter-deposition method at 400 C. Rutherford backscattering spectroscopy shows that the Al/Zn composition and the film thickness are 4 % and 0.3 m. No appreciable change was observed in optical transparency. We find that the conductivity monotonically increases from 1.510 to 810 S/cm with increasing the fluence up to 410/cm, as already been observed for 100 keV Ne irradiation. The fluence of 100 keV Ne at which the conductivity takes its maximum is 310/cm (7 dpa). The dpa of 100 MeV Xe at 410/cm is estimated as 0.008. Hence, the conductivity increase by 100 MeV Xe ion is ascribed to the electronic excitation effects.
Shinde, N.*; Matsunami, Noriaki*; Tazawa, Masato*; Sataka, Masao; Chimi, Yasuhiro
Transactions of the Materials Research Society of Japan, 31(3), p.709 - 712, 2006/09
no abstracts in English
Matsunami, Noriaki*; Ito, Masaharu*; Takai, Yoshiaki*; Tazawa, Masato*; Sataka, Masao
Nuclear Instruments and Methods in Physics Research B, 206, p.282 - 286, 2003/05
Times Cited Count：23 Percentile：80.7(Instruments & Instrumentation)no abstracts in English
Tonomura, A.*; Hasai, H.*; Kamimura, O.*; Matsuda, T.*; Harada, K.*; Nakayama, Y.*; Shimoyama, J.*; Kishio, K.*; Hanaguri, T.*; Kitazawa, K.*; et al.
Nature, 412(6847), p.620 - 622, 2001/08
Times Cited Count：104 Percentile：94.34(Multidisciplinary Sciences)Direct observation microscopically elucidated the behaviour of vortices in Bi-2212 thin films. The isotropic pinning of vortices by columnar defects at low magnetic fields indirectly inferred by macroscopic magnetization measurements can be explained microscopically as follows; vortex lines are trapped along columns ate temperatures above 19K irrespective of the direction of the applied magnetic field; and at temperatures below 12K vortex lines always penetrate the film perpendicularly to the film plane owing to the increased background pinning compared to the columnar-defect pinning and also because of the demagnetization effect of thin film.
films by high-energy ion irradiationShinde, N.*; Matsunami, Noriaki*; Shimura, Tetsuo*; Sataka, Masao; Okayasu, Satoru; Tazawa, Masato*
no journal, ,
no abstracts in English
N films and phase separationMatsunami, Noriaki*; Kakiuchida, Hiroshi*; Tazawa, Masato*; Sataka, Masao; Okayasu, Satoru; Sugai, Hiroyuki
no journal, ,
no abstracts in English
Kakurai, Kazuhisa; Wakimoto, Shuichi; Matsuda, Masaaki*; Ishiwata, Shintaro*; Okuyama, Daisuke*; Taguchi, Yasujiro*; Tokura, Yoshiki*; Nishi, Masakazu*; Nakajima, Taro*; Mitsuda, Setsuo*; et al.
no journal, ,
Yin, Y.-G.; Suzui, Nobuo; Kawachi, Naoki; Yamaguchi, Mitsutaka; Tanoi, Keitaro*; Nakanishi, Tomoko*; Chino, Mitsuo*; Nakamura, Shinichi*; Watabe, Hiroshi*; Yamamoto, Seiichi*; et al.
no journal, ,
no abstracts in English
AlMetoki, Naoto; Yamauchi, Hiroki; Kitazawa, Hideaki*; Suzuki, Hiroyuki*; Hagihara, Masato*; Frontzek, M. D.*; Matsuda, Masaaki*; Fernandez-Baca, J. A.*
no journal, ,
Magnetic structure of NdPdAl has been studied by means of neutron powder diffraction. We observed remarkable magnetic reflections with the modulation vector = (1/2 0 0) below the ordering temperature = 1.2 K. We found a collinear magnetic structure of Nd moment of 2.9(1) at 0.3 K parallel to the -axis, where the ferromagnetically ordered planes stack with four Nd layer period of ++-- sequence along the direction with the distance between adjuscent Nd layers to be . This is very similar to CePdAl with = (0.23 0.23 0) and the Ce moment parallel to the -axis. These structures with in-plane modulation is a consequence of the two dimensional nature of fermi surface topology in this family, coming from unique crystal structure with very long tetragonal unit cell and large distance 7 between the rare earth layers separated by Al and two Pd layers.
AlMetoki, Naoto; Yamauchi, Hiroki; Kitazawa, Hideaki*; Suzuki, Hiroyuki*; Hagihara, Masato*; Frontzek, M. D.*; Matsuda, Masaaki*; Fernandez-Baca, J. A.*
no journal, ,
Magnetic structure of NdPdAl has been studied by means of neutron powder diffraction. We observed remarkable magnetic reflections with the modulation vector = (1/2 0 0) below the ordering temperature = 1.2 K. We found a collinear magnetic structure of Nd moment of 2.9(1) at 0.3 K parallel to the -axis, where the ferromagnetically ordered planes stack with four Nd layer period of ++-- sequence along the direction with the distance between adjacent Nd layers to be . This is very similar to CePdAl with = (0.23 0.23 0) and the Ce moment parallel to the -axis. These structures with in-plane modulation is a consequence of the two dimensional nature of fermi surface topology in this family, coming from unique crystal structure with very long tetragonal unit cell and large distance 7 between the rare earth layers separated by Al and two Pd layers.
