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Journal Articles

X-ray photon correlation spectroscopy of structural fluctuations in relaxor ferroelectrics PZN-9%PT

Owada, Kenji; Shimomura, Susumu*; Nakao, Hironori*; Matsushita, Mitsuyoshi*; Namikawa, Kazumichi*; Mizuki, Junichiro

Journal of Physics; Conference Series, 320, p.012086_1 - 012086_5, 2011/09

https://doi.org/10.1088/1742-6596/320/1/012086
 Times Cited Count：0 Percentile：0.03(Physics, Condensed Matter)

We have performed an X-ray photon correlation spectroscopy measurement of 91$$%$$Pb(Zn$$_{1/3}$$Nb$$_{2/3}$$)O$$_{3}$$-9$$%$$PbTiO$$_{3}$$ and found a slow structural fluctuation in time near $$T_{rm C}$$. The slow fluctuation consists of long-term and short-term fluctuations. We have derived the short-term fluctuation from the intensity fluctuations and found out the relaxation time to be an order of 10s. It is suggested that the slow fluctuation is owing to the competition between macroscopic tetragonal symmetry and the microscopic orthorhombic symmetry. The competition should be a main reason for the low-frequency dielectric permittivity.

Journal Articles

Contribution of intermediate submicrometer structures to physical properties near $$T$$$$_{rm c}$$ in Pb(Zn$$_{1/3}$$Nb$$_{2/3}$$)O$$_{3}$$-9%PbTiO$$_{3}$$PbTiO$$_{3}$$

Owada, Kenji; Mizuki, Junichiro; Namikawa, Kazumichi*; Matsushita, Mitsuyoshi*; Shimomura, Susumu*; Nakao, Hironori*; Hirota, Kazuma*

Physical Review B, 83(22), p.224115_1 - 224115_7, 2011/06

https://doi.org/10.1103/PhysRevB.83.224115
 Times Cited Count：8 Percentile：36.17(Materials Science, Multidisciplinary)

Complementary use of coherent X-ray diffraction (CXD), X-ray diffuse scattering, conventional X-ray diffraction techniques and dielectric measurements has enabled us to investigate Pb(Zn$$_{1/3}$$Nb$$_{2/3}$$)O$$_{3}$$-9%PbTiO$$_{3}$$ with a multiple-length-scale approach from the macroscale (lattice constants, bulk averaged) and microscale to the nanoscale (polar nanoregions (PNRs)) and discuss the contribution of each scale to the dielectric permittivity.

Journal Articles

Electronic band structure and fermi surface of heavy-fermion neptunium superconductor NpPd$$_5$$Al$$_2$$

Yamagami, Hiroshi*; Aoki, Dai*; Haga, Yoshinori; Onuki, Yoshichika

Journal of the Physical Society of Japan, 76(8), p.083708_1 - 083708_4, 2007/08

https://doi.org/10.1143/JPSJ.76.083708
 Times Cited Count：23 Percentile：97.56(Physics, Multidisciplinary)

Journal Articles

Crossover of the 5f electrons from itinerant to localized in UPtGa$$_5$$

Onuki, Yoshichika; Ikeda, Shugo; Yamagami, Hiroshi*; Galatanu, A.*; Haga, Yoshinori; Matsuda, Tatsuma; Yamamoto, Etsuji; Settai, Rikio*

Physica B; Condensed Matter, 378-380, p.972 - 973, 2006/05

https://doi.org/10.1016/j.physb.2006.01.372
 Times Cited Count：0 Percentile：0(Physics, Condensed Matter)

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