JOPSS - Search Results

Journal Articles

Phase transitions and relaxor behavior of lead-free ferroelectric bismuth potassium titanate

Saito, Kotaro*; Matsuo, Hiroki*; Yoneda, Yasuhiro; Ye, Z.-G*; Noguchi, Yuji*

Journal of Applied Physics, 138(9), p.094102_1 - 094102_9, 2025/09

https://doi.org/10.1063/5.0272995

Times Cited Count：2 Percentile：40.34(Physics, Applied)

Journal Articles

Local and electronic structures of BaTiO/KNbO nanocomposite particles

Yoneda, Yasuhiro; Kobayashi, Toru; Tsuji, Takuya; Shibata, Goro; Takeda, Yukiharu*; Saito, Yuji; Khanal, G. P.*; Fujii, Ichiro*; Ueno, Shintaro*; Sato, Yukio*; et al.

Japanese Journal of Applied Physics, 64(8), p.08SP07_1 - 08SP07_8, 2025/08

https://doi.org/10.35848/1347-4065/adf4f1

Times Cited Count：2 Percentile：21.19(Physics, Applied)

It has become possible to synthesize high-quality composite nanoparticles in which a different material is grown on the surface of nanoparticle crystals. To evaluate such nanostructures, it is effective to combine different evaluation methods at various scales. We performed various structural and electronic state evaluations of BaTiO/KNbO nanocomposite particles using synchrotron radiation. From the structural evaluation, it was confirmed that the nanocomposite particles have a core of 100 nm of BaTiO covered with 20 nm of KNbO. The O-K absorption edge spectrum of the outermost surface KNbO was different from that of the bulk and nanoparticles, and it was found that the chemical bonding state changes when KNbO $_{3}$ is made into composite particles.

Journal Articles

Crystal structures and phase stability of antiferroelectric phases in undoped and Ca-modified sodium niobates

Aso, Seiyu*; Matsuo, Hiroki*; Yoneda, Yasuhiro; Morikawa, Daisuke*; Tsuda, Kenji*; Oyama, Kenji*; Ishigaki, Toru*; Noguchi, Yuji*

Physical Review B, 111(17), p.174114_1 - 174114_12, 2025/05

https://doi.org/10.1103/PhysRevB.111.174114

Times Cited Count：2 Percentile：40.34(Materials Science, Multidisciplinary)

We investigate the crystal structures, phase transitions, and phase stability of undoped and Ca-modified NaNbO $_{3}$ through a combined analysis of high-resolution synchrotron radiation X-ray and neutron diffraction, convergent-beam electron diffraction, and density functional theory (DFT) calculations. It is demonstrated that the antiferroelectric (AFE)- phase is stabilized over a wide temperature range of 200 to 800 K by Ca modification, and that the NaNbO is stabilized by temperature-driven isostatic pressure accompanied by lattice expansion, whereas the Ca-modified NaNbO is induced by composition-induced chemical pressure along with lattice shrinkage.

Journal Articles

Atomic imaging of BaTiO $_{3}$ by multiple-wavelength neutron holography

Yamakawa, Kota*; Nakada, Hajime*; Kimura, Koji*; Oikawa, Kenichi; Harada, Masahide; Inamura, Yasuhiro; Oyama, Kenji*; Hayashi, Koichi*

Journal of the Physical Society of Japan, 93(10), p.104601_1 - 104601_5, 2024/10

https://doi.org/10.7566/JPSJ.93.104601

Times Cited Count：2 Percentile：31.93(Physics, Multidisciplinary)

Journal Articles

Existence of local polar domains in perovskite oxyfluoride, BaFeOF

Katsumata, Tetsuhiro*; Suzuki, Ryo*; Sato, Naoto*; Oda, Ryoya*; Motoyama, Shingo*; Suzuki, Shumpei*; Nakashima, Mamoru*; Inaguma, Yoshiyuki*; Mori, Daisuke*; Aimi, Akihisa*; et al.

Chemistry of Materials, 36(8), p.3697 - 3704, 2024/04

https://doi.org/10.1021/acs.chemmater.3c03275

Times Cited Count：2 Percentile：13.39(Chemistry, Physical)

A perovskite-type oxynitride BaFeOF was prepared by high-pressure synthesis. Since the SHG signal was observed in the obtained material, suggesting the existence of spontaneous polarization, the mechanism of polarization was investigated by synchrotron high-energy X-ray diffraction. The obtained pair distribution functions were fitted, and a local polarization mechanism with different orientations was found. Since BaFeOF is also a magnetic material, a magnetic domain and a ferroelectric domain are considered to coexist.

Journal Articles

Defect-induced phase separation in relaxor Pb(In $_{1/2}$ Nb $_{1/2}$ )O crystals

Yoneda, Yasuhiro; Matsumoto, Norimasa; Terauchi, Hikaru*; Yasuda, Naohiko*

Journal of Physics; Condensed Matter, 15(3), p.467 - 474, 2003/01

https://doi.org/10.1088/0953-8984/15/3/311

Times Cited Count：6 Percentile：34.33(Physics, Condensed Matter)

Thermal properties of ordered and disordered Pb(In $_{1/2}$ Nb $_{1/2}$ )O (PIN) single clystals were investigated. The defect-induced phase separation provided a good agreement of the instability of the relaxor nd antiferroelectric states of the PIN crystals.

Journal Articles

X-ray study on phase transitions in ferroelectric Rb $_{2}$ CoX $_{4}$ (X=Cl or Br) crystal

; ; ;

Journal of the Physical Society of Japan, 56(2), p.831 - 832, 1987/02

https://doi.org/10.1143/JPSJ.56.831

Times Cited Count：23 Percentile：97.70(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Effect of hydrostatic pressure on the lock-in transitions in tetramethylammonium tetrahalogenometallic compounds, {N(CH $_{3}$ ) $_{4}$ } $_{2}$ XY $_{4}$

Ferroelectrics, 66, p.269 - 286, 1986/00

https://doi.org/10.1080/00150198608227891

no abstracts in English

Journal Articles

Effect of hydrostatic pressure on the normal-incommensurate-ferroelectric transitions in Rb $_{2}$ ZnCl $_{4}$ ,Rb $_{2}$ ZnBr $_{4}$ ,and K $_{2}$ ZnCl $_{4}$

Ferroelectrics, 64, p.97 - 106, 1985/00

https://doi.org/10.1080/00150198508018703

no abstracts in English

Journal Articles

Phase transitions and dielectric properties of some monoclinic A $_{2}$ XY $_{4}$ crystals; Rb $_{2}$ ZnI $_{4}$ ,Tl $_{2}$ ZnI $_{4}$ ,and Cs $_{2}$ HgI $_{4}$

Japanese Journal of Applied Physics, 24(SUPPL.24-2), p.387 - 389, 1985/00

https://doi.org/10.1143/JJAP.24.L387

Times Cited Count：110 Percentile：96.13(Physics, Applied)

no abstracts in English

Journal Articles

Quasi-static D-E hysteresis loops on SC(NH $_{2}$ ) $_{2}$ and SC(ND $_{2}$ ) $_{2}$ at the phase transition regions

; ; ; ; ;

Japanese Journal of Applied Physics, 24(SUPPL.24-2), p.844 - 846, 1985/00

no abstracts in English

Journal Articles

Ferroelectricity in Tl $_{2}$ ZnI $_{4}$

Journal of the Physical Society of Japan, 54(10), p.3694 - 3696, 1985/00

https://doi.org/10.1143/JPSJ.54.3694

Times Cited Count：35 Percentile：90.33(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Reinvestigation of pressure-induced III-III transitions in ferroelectric Ca $_{2}$ Sr(C $_{2}$ H $_{5}$ COO) $_{6}$ and Ca $_{2}$ Pb(C $_{2}$ H $_{5}$ COO) $_{6}$

Journal of the Physical Society of Japan, 53(5), p.1602 - 1605, 1984/00

https://doi.org/10.1143/JPSJ.53.1602

Times Cited Count：9 Percentile：69.98(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Effect of hydrostatic pressure on the antiferroelectric phase transitions in ammonium dihydrogen arsenate NH $_{4}$ H $_{2}$ AsO $_{4}$ and deuterated analogue

; Ozawa, K.

Journal of the Physical Society of Japan, 53(12), p.4405 - 4412, 1984/00

https://doi.org/10.1143/JPSJ.53.4405

Times Cited Count：7 Percentile：59.24(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Neutron scattering study on the normal-incommensurate phase transition in K $_{2}$ ZnCl $_{4}$

;

Journal of the Physical Society of Japan, 53(12), p.4271 - 4278, 1984/00

https://doi.org/10.1143/JPSJ.53.4271

Times Cited Count：31 Percentile：85.10(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

X-ray diffraction study on the incommensurate-commensurate phase transition in{N(CD $_{3}$ ) $_{4}$ } $_{2}$ CoCl $_{4}$

; ; ;

Journal of the Physical Society of Japan, 53(5), p.1863 - 1865, 1984/00

https://doi.org/10.1143/JPSJ.53.1863

Times Cited Count：5 Percentile：52.18(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Effect of hydrostatic pressure on the phase transitions in monoclinic and tetragonal RbD $_{2}$ PO $_{4}$ crystals

; Ozawa, K.; ;

Journal of the Physical Society of Japan, 52(7), p.2538 - 2543, 1983/00

https://doi.org/10.1143/JPSJ.52.2538

Times Cited Count：23 Percentile：81.43(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Pregion of{N(CH $_{3}$ ) $_{4}$ } $_{2}$ FeCl $_{4}$ in the pressure-temperature phase space

Journal of the Physical Society of Japan, 52(10), p.3322 - 3324, 1983/00

https://doi.org/10.1143/JPSJ.52.3322

Times Cited Count：10 Percentile：79.21(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Phase transitions and ferroelectricity in {N(CH $_{3}$ ) $_{4}$ } $_{2}$ XBr $_{4}$ (X:Zn,Co,Cu)

Journal of the Physical Society of Japan, 51(1), p.203 - 207, 1982/00

https://doi.org/10.1143/JPSJ.51.203

Times Cited Count：94 Percentile：95.45(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Neutron diffration study on the incommensurate-to-commensurate phase transition of ferroelectric III phase in SC(ND $_{2}$ ) $_{2}$ at D.C.bias electric field

;

Journal of the Physical Society of Japan, 51(4), p.1047 - 1048, 1982/00

https://doi.org/10.1143/JPSJ.51.1047

Times Cited Count：3 Percentile：52.67(Physics, Multidisciplinary)

no abstracts in English

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Phase transitions and relaxor behavior of lead-free ferroelectric bismuth potassium titanate

Local and electronic structures of BaTiO/KNbO nanocomposite particles

Crystal structures and phase stability of antiferroelectric phases in undoped and Ca-modified sodium niobates

Atomic imaging of BaTiO $_{3}$ by multiple-wavelength neutron holography

Existence of local polar domains in perovskite oxyfluoride, BaFeOF

Defect-induced phase separation in relaxor Pb(In $_{1/2}$ Nb $_{1/2}$ )O crystals

X-ray study on phase transitions in ferroelectric Rb $_{2}$ CoX $_{4}$ (X=Cl or Br) crystal

Effect of hydrostatic pressure on the lock-in transitions in tetramethylammonium tetrahalogenometallic compounds, {N(CH $_{3}$ ) $_{4}$ } $_{2}$ XY $_{4}$

Effect of hydrostatic pressure on the normal-incommensurate-ferroelectric transitions in Rb $_{2}$ ZnCl $_{4}$ ,Rb $_{2}$ ZnBr $_{4}$ ,and K $_{2}$ ZnCl $_{4}$

Phase transitions and dielectric properties of some monoclinic A $_{2}$ XY $_{4}$ crystals; Rb $_{2}$ ZnI $_{4}$ ,Tl $_{2}$ ZnI $_{4}$ ,and Cs $_{2}$ HgI $_{4}$

Quasi-static D-E hysteresis loops on SC(NH $_{2}$ ) $_{2}$ and SC(ND $_{2}$ ) $_{2}$ at the phase transition regions

Ferroelectricity in Tl $_{2}$ ZnI $_{4}$

Reinvestigation of pressure-induced III-III transitions in ferroelectric Ca $_{2}$ Sr(C $_{2}$ H $_{5}$ COO) $_{6}$ and Ca $_{2}$ Pb(C $_{2}$ H $_{5}$ COO) $_{6}$

Effect of hydrostatic pressure on the antiferroelectric phase transitions in ammonium dihydrogen arsenate NH $_{4}$ H $_{2}$ AsO $_{4}$ and deuterated analogue

Neutron scattering study on the normal-incommensurate phase transition in K $_{2}$ ZnCl $_{4}$

X-ray diffraction study on the incommensurate-commensurate phase transition in{N(CD $_{3}$ ) $_{4}$ } $_{2}$ CoCl $_{4}$

Effect of hydrostatic pressure on the phase transitions in monoclinic and tetragonal RbD $_{2}$ PO $_{4}$ crystals

Pregion of{N(CH $_{3}$ ) $_{4}$ } $_{2}$ FeCl $_{4}$ in the pressure-temperature phase space

Phase transitions and ferroelectricity in {N(CH $_{3}$ ) $_{4}$ } $_{2}$ XBr $_{4}$ (X:Zn,Co,Cu)

Neutron diffration study on the incommensurate-to-commensurate phase transition of ferroelectric III phase in SC(ND $_{2}$ ) $_{2}$ at D.C.bias electric field