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Journal Articles

Successive phase transitions in the quasi-kagome lattice system URhSn studied by resonant X-ray scattering

Tabata, Chihiro; Kon, Fusako*; Hibino, Ruo*; Shimizu, Yusei*; Amitsuka, Hiroshi*; Kaneko, Koji; Homma, Yoshiya*; Aoki, Dai*; Nakao, Hironori*

Journal of the Physical Society of Japan, 94(8), p.083701_1 - 083701_5, 2025/07

https://doi.org/10.7566/JPSJ.94.083701
 Times Cited Count：4 Percentile：83.22(Physics, Multidisciplinary)

Journal Articles

Magnetoferroelectric phase transition induced by latent spin-lattice coupling in the geometrically frustrated magnet $$mathrm{CuFe_{0.95}Al_{0.05}O_{2}}$$

Tamatsukuri, Hiromu; Uchihara, Takeru*; Mitsuda, Setsuo*; Ishii, Yuta*; Nakao, Hironori*; Takehana, Kanji*; Imanaka, Yasutaka*

Physical Review B, 111(13), p.134403_1 - 134403_9, 2025/04

https://doi.org/10.1103/PhysRevB.111.134403
 Times Cited Count：1 Percentile：47.59(Materials Science, Multidisciplinary)

Journal Articles

Single helicity of the triple-$$q$$ triangular skyrmion lattice state in the cubic chiral helimagnet EuPtSi

Matsumura, Takeshi*; Tabata, Chihiro; Kaneko, Koji; Nakao, Hironori*; Kakihana, Masashi*; Hedo, Masato*; Nakama, Takao*; Onuki, Yoshichika*

Physical Review B, 109(17), p.174437_1 - 174437_8, 2024/05

https://doi.org/10.1103/PhysRevB.109.174437
 Times Cited Count：10 Percentile：77.83(Materials Science, Multidisciplinary)

Journal Articles

Antiferromagnetic ordering and chiral crystal structure transformation in Nd$$_3$$Rh$$_4$$Sn$$_{13}$$

Shimoda, Ami*; Iwasa, Kazuaki*; Kuwahara, Keitaro*; Sagayama, Hajime*; Nakao, Hironori*; Ishikado, Motoyuki*; Nakao, Akiko*; Kawamura, Seiko; Murai, Naoki; Ohara, Takashi; et al.

Physical Review B, 109(13), p.134425_1 - 134425_10, 2024/04

https://doi.org/10.1103/PhysRevB.109.134425
 Times Cited Count：4 Percentile：50.66(Materials Science, Multidisciplinary)

Journal Articles

Magnetic order in honeycomb layered U$$_2$$Pt$$_6$$Ga$$_{15}$$ studied by resonant X-ray and neutron scattering

Tabata, Chihiro; Kon, Fusako*; Ota, Kyugo*; Hibino, Ruo*; Matsumoto, Yuji*; Amitsuka, Hiroshi*; Nakao, Hironori*; Haga, Yoshinori; Kaneko, Koji

Physical Review B, 109(13), p.134403_1 - 134403_7, 2024/04

https://doi.org/10.1103/PhysRevB.109.134403
 Times Cited Count：2 Percentile：27.48(Materials Science, Multidisciplinary)

Journal Articles

Magnetic ordering and structural phase transitions of Nd$$_{3}$$$$T$$$$_{4}$$Sn$$_{13}$$ ($$T$$ = Rh and Ir)

Shimoda, Ami*; Iwasa, Kazuaki*; Kuwahara, Keitaro*; Sagayama, Hajime*; Nakao, Hironori*; Ishikado, Motoyuki*; Ohara, Takashi; Nakao, Akiko*; Hoshikawa, Akinori*; Ishigaki, Toru*

JPS Conference Proceedings (Internet), 38, p.011091_1 - 011091_6, 2023/05

https://doi.org/10.7566/JPSCP.38.011091

Journal Articles

High-field depinned phase and planar Hall effect in the skyrmion host Gd$$_2$$PdSi$$_3$$

Hirschberger, M.*; Nakajima, Taro*; Kriener, M.*; Kurumaji, Takashi*; Spitz, L.*; Gao, S.*; Kikkawa, Akiko*; Yamasaki, Yuichi*; Sagayama, Hajime*; Nakao, Hironori*; et al.

Physical Review B, 101(22), p.220401_1 - 220401_6, 2020/06

https://doi.org/10.1103/PhysRevB.101.220401
 Times Cited Count：57 Percentile：90.34(Materials Science, Multidisciplinary)

Journal Articles

Successive phase transitions in $$R_{3}$$Ir$$_{4}$$Sn$$_{13}$$ ($$R$$: La and Ce) investigated using neutron and X-ray diffraction

Nakazato, Seiya*; Iwasa, Kazuaki*; Hashimoto, Daisuke*; Shiozawa, Mami*; Kuwahara, Keitaro*; Nakao, Hironori*; Sagayama, Hajime*; Ishikado, Motoyuki*; Ohara, Takashi; Nakao, Akiko*; et al.

JPS Conference Proceedings (Internet), 30, p.011128_1 - 011128_6, 2020/03

https://doi.org/10.7566/JPSCP.30.011128

Journal Articles

Magnetic field induced triple-$$q$$ magnetic order in trillium lattice antiferromagnet EuPtSi studied by resonant X-ray scattering

Tabata, Chihiro*; Matsumura, Takeshi*; Nakao, Hironori*; Michimura, Shinji*; Kakihana, Masashi*; Inami, Toshiya*; Kaneko, Koji; Hedo, Masato*; Nakama, Takao*; Onuki, Yoshichika*

Journal of the Physical Society of Japan, 88(9), p.093704_1 - 093704_5, 2019/09

https://doi.org/10.7566/JPSJ.88.093704
 Times Cited Count：55 Percentile：90.02(Physics, Multidisciplinary)

Journal Articles

Domain structure and electronic state in P3HT:PCBM blend thin films by soft X-ray resonant scattering

Kubota, Masato; Sakurai, Takeaki*; Miyadera, Tetsuhiko*; Nakao, Hironori*; Sugita, Takeshi*; Yoshida, Yuji*

Journal of Applied Physics, 120(16), p.165501_1 - 165501_5, 2016/10

https://doi.org/10.1063/1.4965988
 Times Cited Count：0 Percentile：0.00(Physics, Applied)

We performed soft X-ray resonant scattering experiments on P3HT:PCBM blend thin films to reveal the domain structure and electronic state, where P3HT and PCBM mean regioregular poly (3-hexylthiophene) and [6,6]-phenyl-C61-buteric acid methyl ester, respectively. We measured two films, where chloroform (CF sample) and 1,2-dichlorobenzene (DCB sample) are used as solvents in the fabrication process. There is negligible X-ray incident angle dependence of the X-ray absorption spectra at the S $$K$$-absorption edge in the CF sample, whereas the DCB sample exhibits clear incident angle dependence. We obtained the wave-number resolved spectra at $mbox{boldmath $Q$}$ = (1, 0, 0) for P3HT molecules in both samples. The packing growth of P3HT molecules is revealed to be much more developed in the DCB sample than the CF sample. In addition, the electronic structure at local sulfur element sites clearly changes for both of the samples.

Journal Articles

Observation of all-in type tetrahedral displacements in nonmagnetic pyrochlore niobates

Torigoe, Shuhei*; Ishimoto, Yutaro*; Aoishi, Yuhei*; Murakawa, Hiroshi*; Matsumura, Daiju; Yoshii, Kenji; Yoneda, Yasuhiro; Nishihata, Yasuo; Kodama, Katsuaki; Tomiyasu, Keisuke*; et al.

Physical Review B, 93(8), p.085109_1 - 085109_5, 2016/02

https://doi.org/10.1103/PhysRevB.93.085109
 Times Cited Count：6 Percentile：26.61(Materials Science, Multidisciplinary)

Journal Articles

Magnetic and electronic properties of (LaMnO$$_3$$)$$_5$$(SrMnO$$_3$$)$$_5$$ superlattice revealed by resonant soft X-ray scattering

Kubota, Masato; Yamada, Hiroyuki*; Nakao, Hironori*; Okamoto, Jun*; Yamasaki, Yuichi*; Sawa, Akihito*; Murakami, Yoichi*

Japanese Journal of Applied Physics, 53(5S1), p.05FH07_1 - 05FH07_5, 2014/05

https://doi.org/10.7567/JJAP.53.05FH07
 Times Cited Count：2 Percentile：7.93(Physics, Applied)

Journal Articles

Antiferromagnetic order of the Co$$^{2+}$$ high-spin state with a large orbital angular momentum in La$$_{1.5}$$Ca$$_{0.5}$$CoO$$_{4}$$

Okamoto, Jun*; Nakao, Hironori*; Yamasaki, Yuichi*; Wadachi, Hiroki*; Tanaka, Arata*; Kubota, Masato; Horigane, Kazumasa*; Murakami, Yoichi*; Yamada, Kazuyoshi*

Journal of the Physical Society of Japan, 83(4), p.044705_1 - 044705_6, 2014/04

https://doi.org/10.7566/JPSJ.83.044705
 Times Cited Count：9 Percentile：52.67(Physics, Multidisciplinary)

Journal Articles

Spin state of Co$$^{3+} $$ in LaCo$$_{1-x}$$ Rh$$_{x}$$O$$_{3}$$ investigated by structural phenomena

Asai, Shinichiro*; Okazaki, Ryuji*; Terasaki, Ichiro*; Yasui, Yukio*; Kobayashi, Wataru*; Nakao, Akiko*; Kobayashi, Kensuke*; Kumai, Reiji*; Nakao, Hironori*; Murakami, Yoichi*; et al.

Journal of the Physical Society of Japan, 82(11), p.114606_1 - 114606_6, 2013/11

https://doi.org/10.7566/JPSJ.82.114606
 Times Cited Count：7 Percentile：45.17(Physics, Multidisciplinary)

Neutron and synchrotron X-ray diffraction for LaCo$$_{1-x}$$ Rh$$_{x}$$O$$_{3}$$ have been carried out in order to investigate the structural properties related with the spin state of Co$$^{3+}$$ ions. We have found that the values of the Co(Rh)-O bond lengths in the Co(Rh)O$$_{6}$$ octahedron of LaCo$$_{0.8}$$Rh$$_{0.2}$$O$$_{3}$$ are nearly identical at 10 K. The lattice volume for the Rh$$^{3+}$$ substituted samples decreases with the thermal expansion coefficient similar to that of LaCoO$$_{3}$$ from room temperature, and ceases to decrease around 70 K. These experimental results favor a mixed state consisting of the high-spin state and low-spin state Co$$^{3+}$$ ions, and suggest that the high-spin state Co$$^{3+}$$ ions are thermally excited in addition to those pinned by the substituted Rh$$^{3+}$$ ions.

Journal Articles

Emergent phenomena in perovskite-type manganites

Taguchi, Yasujiro*; Sakai, Hideaki*; Okuyama, Daisuke*; Ishiwata, Shintaro*; Fujioka, Jun*; Fukuda, Tatsuo; Hashizume, Daisuke*; Kagawa, Fumitaka*; Takahashi, Yoichiro*; Shimano, Ryo*; et al.

Physica B; Condensed Matter, 407(11), p.1685 - 1688, 2012/06

https://doi.org/10.1016/j.physb.2012.01.006
 Times Cited Count：6 Percentile：26.11(Physics, Condensed Matter)

Journal Articles

Magnetic phase diagrams of YVO$$_{3}$$ and TbVO$$_{3}$$ under high pressure

Bizen, Daisuke*; Nakao, Hironori*; Iwasa, Kazuaki*; Murakami, Yoichi*; Osakabe, Toyotaka; Fujioka, Jun*; Yasue, Toshio*; Miyasaka, Shigeki*; Tokura, Yoshinori*

Journal of the Physical Society of Japan, 81(2), p.024715_1 - 024715_6, 2012/02

https://doi.org/10.1143/JPSJ.81.024715
 Times Cited Count：7 Percentile：44.78(Physics, Multidisciplinary)

The magnetic phase diagrams for $$R$$VO$$_{3}$$ ($$R$$ = Y, Tb) were determined by low temperature and high pressure neutron-diffraction techniques. We found that the magnetic ground state in TbVO$$_{3}$$ changes from ${it C}$-type spin ordering (${it C}$-SO) to ${it G}$-type spin ordering (${it G}$-SO) on application of pressure. The transition of the magnetic ground state also indicates that the ground state of the orbital ordering changes from ${it G}$-type orbital ordering (${it G}$-OO) to ${it C}$-type orbital ordering (${it C}$-OO). In YVO$$_{3}$$, the ${it G}$-SO and ${it C}$-OO phases set in simultaneously up to 6.2 GPa, and the disorder-[${it G}$-SO, ${it C}$-OO] phase transition appears above 6 GPa. This is the first observation of a simultaneous spin and orbital order-disorder phase transition in perovskite-type transition-metal oxides $$R$$MO$$_{3}$$. The [${it G}$-SO, ${it C}$-OO] phase is strongly stabilized with increasing pressure, and both the covalency effect and the superexchange interaction play roles in this stabilization.

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：0.00(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：9 Percentile：36.84(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

X-ray photon correlation spectroscopy study in valence fluctuation compound Eu$$_{3}$$S$$_{4}$$

Nakao, Hironori*; Owada, Kenji; Shimomura, Susumu*; Ochiai, Akira*; Namikawa, Kazumichi*; Mizuki, Junichiro; Mimura, Hidekazu*; Yamauchi, Kazuto*; Murakami, Yoichi*

AIP Conference Proceedings 1234, p.935 - 938, 2010/06

https://doi.org/10.1063/1.3463370
 Times Cited Count：2 Percentile：65.08(Physics, Applied)

Journal Articles

X-ray intensity fluctuation spectroscopy using nanofocused hard X-rays; Its application to study of relaxor ferroelectrics

Owada, Kenji; Namikawa, Kazumichi*; Shimomura, Susumu*; Nakao, Hironori*; Mimura, Hidekazu*; Yamauchi, Kazuto*; Matsushita, Mitsuyoshi*; Mizuki, Junichiro

Japanese Journal of Applied Physics, 49(2), p.020216_1 - 020216_3, 2010/02

https://doi.org/10.1143/JJAP.49.020216
 Times Cited Count：3 Percentile：14.16(Physics, Applied)

52 (Records 1-20 displayed on this page)