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Journal Articles

Small angle neutron scattering study on Pr$$_{0.7}$$Ca$$_{0.3}$$MnO$$_{3}$$; Evidence of two-phase coexistence

Yamada, Yasusada*; Iwase, Takeshi*; Wakahiki, Masaya*; Suzuki, Junichi

Journal of the Physical Society of Japan, 70(6), p.1593 - 1597, 2001/06

 Times Cited Count:2 Percentile:21.12(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Small-angle neutron scattering study on ferromagnetic correlation in (La, Tb)$$_{2/3}$$Ca$$_{1/3}$$MnO$$_{3}$$

Wakahiki, Masaya*; Metoki, Naoto; Suzuki, Junichi; Oikawa, Kenichi; Nie, J.*; Tachiki, Masashi*; Yamada, Yasusada

Journal of the Physical Society of Japan, 70(4), p.1090 - 1098, 2001/04

 Times Cited Count:6 Percentile:42.89(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

SANS study of Pr$$_{0.7}$$Ca$$_{0.3}$$MnO$$_{3}$$ system as 'Magnetic Relaxor'

Yamada, Yasusada; Iwase, Takeshi*; Takakura, Tomoyuki*; Suzuki, Junichi; Wakahiki, Masaya*

Journal of the Physical Society of Japan, Vol.70, Supplement A, p.70 - 72, 2001/00

no abstracts in English

Journal Articles

Neutron diffraction of hole polaron ordering in La$$_{1-x}$$Sr$$_{x}$$MnO$$_{3}$$(x$$simeqfrac{1}{8}$$)

Yamada, Yasusada; Suzuki, Junichi; Oikawa, Kenichi*; Katano, Susumu; Fernandez-Baca, J. A.*

Physical Review B, 62(17), p.11600 - 11608, 2000/11

 Times Cited Count:38 Percentile:83.56(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Phase transitions, diffuse scattering and segregation kinetics in the colossal magnetoresistance material Pr$$_{70}$$Ca$$_{30}$$MnO$$_{3}$$

Katano, Susumu; Fernandez-Baca, J. A.*; Yamada, Yasusada

Physica B; Condensed Matter, 276-278, p.786 - 787, 2000/03

 Times Cited Count:9 Percentile:48.52(Physics, Condensed Matter)

no abstracts in English

Journal Articles

Change ordering in La$$_{1-x}$$Sr$$_{x}$$MnO$$_{3}$$(x$$sim$$0.12)

Inami, Toshiya; Ikeda, Naoshi*; Murakami, Yoichi*; Koyama, Ichiro*; Wakabayashi, Yusuke*; Yamada, Yasusada*

Japanese Journal of Applied Physics, 38(suppl.38-1), p.212 - 214, 1999/06

 Times Cited Count:15 Percentile:67.01(Physics, Applied)

no abstracts in English

Journal Articles

Incommensurate charge ordering in mixed valence system LuFe$$_{2}$$O$$_{4}$$

Ikeda, Naoshi*; Yamada, Yasusada*; Nodo, S.*; Inami, Toshiya; Katano, Susumu

Physica B; Condensed Matter, 241-243, p.820 - 822, 1998/00

 Times Cited Count:20 Percentile:74.19(Physics, Condensed Matter)

no abstracts in English

Journal Articles

Charge ordering in low-doping rate A$$_{1-x}$$B$$_{x}$$MnO$$_{3}$$ (A:La,Pr;B:Sr,Ca)

Inami, Toshiya*; Hino, O.*; Nodo, S.*; Kaneo, Rinna*; Ikeda, Naoshi*; Yamada, Yasusada*; Katano, Susumu

Physica B; Condensed Matter, 241-243, p.433 - 435, 1998/00

 Times Cited Count:6 Percentile:43.14(Physics, Condensed Matter)

no abstracts in English

Journal Articles

Present/future status of neutron-scattering facilities in Asian and Oceanian districts

Yamada, Yasusada*; Morii, Yukio

Physica B; Condensed Matter, 241-243, p.22 - 29, 1998/00

 Times Cited Count:0 Percentile:0(Physics, Condensed Matter)

no abstracts in English

Journal Articles

Next generation neutron source project in Japan Atomic Energy Reserch Institute(JAERI)

Yamada, Yasusada*; Watanabe, Noboru*; Niimura, Nobuo; Morii, Yukio; Katano, Susumu; Aizawa, Kazuya; Suzuki, Junichi; Koizumi, Satoshi; Osakabe, Toyotaka; Teshigawara, Makoto*; et al.

Physica B; Condensed Matter, 241-243, p.42 - 45, 1998/00

 Times Cited Count:4 Percentile:33.4(Physics, Condensed Matter)

no abstracts in English

Journal Articles

Elastic and inelastic neutron scattering studies on the martensitic phase transformation in Cu-39at.%Zn alloy

*; *; *; *; *; Morii, Yukio; Yamada, Yasusada*; H.R.Child*; H.Chou*; S.C.Moss*

Journal of the Physical Society of Japan, 66(4), p.1033 - 1043, 1997/04

 Times Cited Count:1 Percentile:19.53(Physics, Multidisciplinary)

no abstracts in English

JAEA Reports

Next generation neutron scattering at neutron science center project in JAERI

Yamada, Yasusada*; Watanabe, Noboru*; Niimura, Nobuo*; Morii, Yukio; Katano, Susumu; Aizawa, Kazuya; Suzuki, Junichi; ; Osakabe, Toyotaka

JAERI-Review 96-019, 43 Pages, 1997/01

JAERI-Review-96-019.pdf:1.96MB

no abstracts in English

Journal Articles

Polaron ordering in low-doping La$$_{1-x}$$Sr$$_{x}$$MnO$$_{3}$$

Yamada, Yasusada*; Hino, O.*; Nodo, S.*; Kaneo, Rinna*; Inami, Toshiya*; Katano, Susumu

Physical Review Letters, 77(5), p.904 - 907, 1996/07

 Times Cited Count:309 Percentile:98.7(Physics, Multidisciplinary)

no abstracts in English

Oral presentation

Magnetic ordering process in the charge-frustrated ferroelectric system LuFe$$_{2}$$O$$_{4}$$

Kakurai, Kazuhisa; Ikeda, Naoshi*; Nagai, Satoshi*; Matsuda, Masaaki; Ishii, Yoshinobu; Owada, Kenji; Inami, Toshiya; Yoshii, Kenji; Murakami, Yoichi*; Kito, Hijiri*; et al.

no journal, , 

We report in this paper an anomalous magnetic ordering process in the charge ordered LuFe$$_{2}$$O$$_{4}$$. The neutron scattering experiments were performed on TAS-1 and TAS-2 instruments installed at JAEA-JRR-3. The following results are obtained:1) Despite the triangular configuration a strong 2-D antiferromagnetic correlation with ferrimagnetic component in the double layer in the hexagonal plane develops to a 3-D order along the c-axis at T$$_{N}$$=242K.2) At around 177K there is another characteristic temperature T$$_{f}$$, where new type of broad magnetic peaks start to grow and at the same time the magnetic peaks already developed below T$$_{N}$$ also acquire finite line width, including the peaks due to the ferrimagnetic component. A strong hysteresis is observed at T$$_{f}$$. The existence of the anomalous magnetic ground state will be demonstrated and the possible relation to the orbital degree of freedom will be discussed.

Oral presentation

Neutron scattering studies on ferroelectric, charge and spin frustrated layered triangular system LuFe$$_{2}$$O$$_{4}$$

Kakurai, Kazuhisa; Ikeda, Naoshi*; Nagai, Satoshi*; Matsuda, Masaaki; Ishii, Yoshinobu; Owada, Kenji; Inami, Toshiya; Yoshii, Kenji; Murakami, Yoichi*; Kito, Hijiri*; et al.

no journal, , 

The observation of an anomalous magnetic ordering process in the charge ordered LuFe$$_{2}$$O$$_{4}$$ by means of neutron scattering is reported. The neutron scattering experiments were performed on TAS-1 and TAS-2 instruments installed at JAEA-JRR-3. Despite the triangular configuration a strong 2-D antiferromagnetic correlation with ferrimagnetic component in the double layer in the hexagonal plane develops to a 3-D order along the c-axis at T$$_{N}$$=242K. At around 177K another characteristic temperature T$$_{f}$$ was discovered where new type of broad magnetic peaks start to grow and at the same time the magnetic peaks already developed below T$$_{N}$$ also acquire finite line width, including the peaks due to the ferrimagnetic component. Field dependence of T$$_{f}$$ was investigated. Upon applying the field perpendicular to the layer plane, T$$_{f}$$ decreases and vanishes above 3T. The existence of the anomalous magnetic ground state will be demonstrated and discussed.

Oral presentation

Field dependence of the magnetic ordering process in layered triangular system LuFe$$_{2}$$O$$_{4}$$

Kakurai, Kazuhisa; Ikeda, Naoshi*; Nagai, Satoshi*; Matsuda, Masaaki; Ishii, Yoshinobu; Owada, Kenji; Inami, Toshiya; Yoshii, Kenji; Murakami, Yoichi*; Kito, Hijiri*; et al.

no journal, , 

The field dependence of the anomalous magnetic ordering process in the charge ordered LuFe$$_{2}$$O$$_{4}$$ by means of neutron scattering is reported. Despite the triangular configuration a strong 2-D antiferromagnetic correlation with ferrimagnetic component in the double layer in the hexagonal plane develops to a 3-D order along the c-axis at T$$_{N}$$=242K. At around 177K another characteristic temperature T$$_{f}$$ was discovered where new type of broad magnetic peaks start to grow and at the same time the magnetic peaks already developed below T$$_{N}$$ also acquire finite line width, including the peaks due to the ferrimagnetic component. Field dependence of T$$_{f}$$ was investigated. Upon applying the field perpendicular to the layer plane, T$$_{f}$$ decreases and vanishes above 3T.

Oral presentation

Magnetic ordering process in layered triangular system LuFe$$_{2}$$O$$_{4}$$ in applied field

Kakurai, Kazuhisa; Matsuda, Masaaki; Yoshii, Kenji; Ikeda, Naoshi*; Ishii, Yoshinobu; Kito, Hijiri*; Yamada, Yasusada*

no journal, , 

no abstracts in English

Oral presentation

Magnetic ordering process in the charge-frustrated ferroelectric system LuFe$$_{2}$$O$$_{4}$$

Kakurai, Kazuhisa; Ikeda, Naoshi*; Nagai, Satoshi*; Matsuda, Masaaki; Ishii, Yoshinobu; Owada, Kenji; Inami, Toshiya; Yoshii, Kenji; Murakami, Yoichi*; Kito, Hijiri*; et al.

no journal, , 

no abstracts in English

Oral presentation

Magnetic ordering process in the charge frustrated ferroelectric LuFe$$_{2}$$O$$_{4}$$

Kakurai, Kazuhisa; Ikeda, Naoshi*; Nagai, Satoshi*; Matsuda, Masaaki; Ishii, Yoshinobu*; Owada, Kenji; Inami, Toshiya; Yoshii, Kenji; Murakami, Yoichi*; Kito, Hijiri*; et al.

no journal, , 

Recently the investigation of multiferroic systems showing strong correlation between the magnetic and ferroelectric ordering is attracting much attention. The temperature variation of the electric polarization in LuFe$$_{2}$$O$$_{4}$$ indicates such a strong correlation. The magnetic ordering process of this ferrimagnetic system is complex showing a frozen spin ground state in zero field. We have investigated the field dependence of the magnetic ordering process and discovered that the frozen state is suppressed upon application of the magnetic field in the stacking direction of this layered compound.

Oral presentation

Magnetic ground state in the ferroelectric LuFe$$_{2}$$O$$_{4}$$

Kakurai, Kazuhisa; Matsuda, Masaaki; Yoshii, Kenji; Ikeda, Naoshi*; Kito, Hijiri*; Yamada, Yasusada*

no journal, , 

Recently the investigation of multiferroic systems showing strong correlation between the magnetic and ferroelectric ordering is attracting much attention. The temperature variation of the electric polarization in LuFe$$_{2}$$O$$_{4}$$ indicates such a strong correlation. The magnetic ordering process of this ferrimagnetic system is complex showing a frozen spin ground state in zero field. We have investigated the field dependence of the magnetic ordering process and discovered that the frozen state is suppressed upon application of the magnetic field in the stacking c-axis direction of this layered compound and that a ground state with much larger correlation in c-axis direction is established.

Oral presentation

Magnetic ground state of layered triangular lattice system LuFe$$_{2}$$O$$_{4}$$ in applied magnetic field

Kakurai, Kazuhisa; Matsuda, Masaaki; Yoshii, Kenji; Ikeda, Naoshi*; Kito, Hijiri*; Yamada, Yasusada*

no journal, , 

no abstracts in English

21 (Records 1-20 displayed on this page)