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Journal Articles

Magnetic boson peak in classical spin glasses

Kofu, Maiko; Kawamura, Seiko; Murai, Naoki; Ishii, Rieko*; Hirai, Daigoro*; Arima, Hiroshi*; Funakoshi, Kenichi*

Physical Review Research (Internet), 6(1), p.013006_1 - 013006_9, 2024/01

Journal Articles

$$f$$-electron states of NpPd$$_5$$Al$$_2$$ and the isostructural family; Heavy fermion superconductivity accompanied by valence crossover

Metoki, Naoto

Kotai Butsuri, 55(7), p.285 - 296, 2020/07

Electron states are the main theme of "solid-state physics", which is essential for microscopic understanding of multipoles and superconductivity, etc. Rare earths (4$$f$$) and actinides (5$$f$$) provide variety of interesting states realized with competing interactions between the increasing number of $$f$$ electrons. Since crystal field splitting of many-body $$f$$ 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 $$f$$ electron states of heavy electron compounds NpPd$$ _5$$Al$$_2$$ and actinide and rare earth based iso-structural family.

Journal Articles

Al-impurity-induced magnetic excitations in heavily over-doped La$$_{1.7}$$Sr$$_{0.3}$$Cu$$_{0.95}$$Al$$_{0.05}$$O$$_{4}$$

Ikeuchi, Kazuhiko*; Nakajima, Kenji; Kawamura, Seiko; Kajimoto, Ryoichi; Wakimoto, Shuichi; Suzuki, Kensuke*; Fujita, Masaki*

AIP Advances (Internet), 8(10), p.101318_1 - 101318_5, 2018/10

 Times Cited Count:0 Percentile:0(Nanoscience & Nanotechnology)

By means of inelastic neutron scattering, we measured magnetic excitations in a sizable single crystal of La$$_{1.7}$$Sr$$_{0.3}$$Cu$$_{0.95}$$Al$$_{0.05}$$O$$_{4}$$, which is an Al-substituted system of the heavily hole-doped cuprate system La$$_{2-x}$$Sr$$_{x}$$CuO$$_{4}$$ with an effective concentration of holes of $$X_{rm eff}$$ = 0.25.

Journal Articles

Coexistence of antiferromagnetism and heavy-fermion superconductivity in CePt$$_{3}$$Si studied by neutron scattering

Kaneko, Koji; Metoki, Naoto; Bernhoeft, N.*; Matsuda, Tatsuma; Haga, Yoshinori; Yasuda, Takashi*; Takeuchi, Tetsuya*; Settai, Rikio*; Onuki, Yoshichika

Journal of the Physical Society of Japan, 75(Suppl.), p.177 - 179, 2006/08

no abstracts in English

Journal Articles

High energy magnetic excitations from the edge-sharing CuO$$_2$$ chains in Ca$$_2$$Y$$_2$$Cu$$_5$$O$$_{10}$$

Matsuda, Masaaki; Kakurai, Kazuhisa; Yethiraj, M.*; Oka, Kunihiko*

Journal of the Physical Society of Japan, 74(5), p.1578 - 1581, 2005/05

 Times Cited Count:3 Percentile:26.67(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Magnetic excitations from the linear Heisenberg antiferromagnetic spin trimer system A$$_3$$Cu$$_3$$(PO$$_4$$)$$_4$$ (A=Ca, Sr, and Pb)

Matsuda, Masaaki; Kakurai, Kazuhisa; Belik, A. A.*; Azuma, Masaki*; Takano, Mikio*; Fujita, Masaki*

Physical Review B, 71(14), p.144411_1 - 144411_5, 2005/04

 Times Cited Count:33 Percentile:75.01(Materials Science, Multidisciplinary)

Inelastic neutron scattering experiments were performed on A$$_3$$Cu$$_3$$(PO$$_4$$)$$_4$$ (A=Ca, Sr, and Pb), which consists of one-dimensional array of linear copper spin trimers. It was found that the magnetic excitations are well described by the linear Heisenberg antiferromagnetic spin trimer model without adjustable parameters except the overall scale factor. The intra-trimer coupling contants are determined to be 9.39(4), 9.99(4), and 9.07(4) meV for A$$_3$$Cu$$_3$$(PO$$_4$$)$$_4$$ with A=Ca, Sr, and Pb, respectively.

Journal Articles

Effects of hole doping on magnetic ground and excited states in the edge-sharing CuO$$_2$$ chains of Ca$$_{2+x}$$Y$$_{2-x}$$Cu$$_5$$O$$_{10}$$

Matsuda, Masaaki; Kakurai, Kazuhisa; Kurogi, Shogo*; Kudo, Kazutaka*; Koike, Yoji*; Yamaguchi, Hirotaka*; Ito, Toshimitsu*; Oka, Kunihiko*

Physical Review B, 71(10), p.104414_1 - 104414_8, 2005/03

 Times Cited Count:13 Percentile:49.98(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Field-induced ferromagnetic correlation in the metamagnetic crossover in CeRu$$_2$$Si$$_2$$ as studied by neutron scattering

Sato, Masugu*; Koike, Yoshihiro*; Katano, Susumu; Metoki, Naoto; Kadowaki, Hiroaki*; Kawarazaki, Shuzo*

Journal of the Physical Society of Japan, 73(12), p.3418 - 3421, 2004/12

 Times Cited Count:20 Percentile:68.56(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Frustrating interactions and broadened magnetic excitations in the edge-sharing CuO$$_{2}$$ chains in La$$_{5}$$Ca$$_{9}$$Cu$$_{24}$$O$$_{41}$$

Matsuda, Masaaki; Kakurai, Kazuhisa; Lorenzo, J. E.*; Regnault, L. P.*; Hiess, A.*; Shirane, Gen*

Physical Review B, 68(6), p.060406_1 - 060406_4, 2003/08

 Times Cited Count:21 Percentile:68.23(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Effects of "stripes" on the magnetic excitation spectra of La$$_{1.48}$$Nd$$_{0.4}$$Sr$$_{0.12}$$CuO$$_{4}$$

Ito, Masafumi*; Yasui, Yukio*; Iikubo, Satoshi*; Soda, Minoru*; Sato, Masatoshi*; Kobayashi, Akito*; Kakurai, Kazuhisa

Journal of the Physical Society of Japan, 72(7), p.1627 - 1630, 2003/07

 Times Cited Count:9 Percentile:52.56(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Neutron scattering study of magnetic ordering and excitations in the doped spin-gap system Tl(Cu$$_{1-x}$$Mg$$_{x}$$)Cl$$_{3}$$

Osawa, Akira; Fujisawa, Masashi*; Kakurai, Kazuhisa; Tanaka, Hidekazu*

Physical Review B, 67(18), p.184424_1 - 184424_8, 2003/05

 Times Cited Count:31 Percentile:77.52(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Magnetic excitations in an itinerant 5${it f}$ antiferromagnet UPt$$_{2}$$Si$$_{2}$$

Metoki, Naoto; Koike, Yoshihiro; Haga, Yoshinori; Bernhoeft, N.*; Lander, G. H.*; Tokiwa, Yoshifumi; Onuki, Yoshichika

Acta Physica Polonica B, 34(2, Part2), p.979 - 982, 2003/02

no abstracts in English

Journal Articles

Neutron scattering experiment on U$$_3{}$$Pd$$_{20}$$Si$$_{6}$$, 1; Crystal and magnetic structure

Tateiwa, Naoyuki*; Metoki, Naoto; Koike, Yoshihiro; Oikawa, Kenichi*; Kimura, Noriaki*; Aoki, Haruyoshi*; Komatsubara, Takemi*

Physica B; Condensed Matter, 312-313, p.891 - 893, 2002/03

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

no abstracts in English

Journal Articles

Magnetic excitations in the spin-gap system TlCuCl$$_{3}$$

Osawa, Akira*; Kato, Tetsuya*; Tanaka, Hidekazu*; Kakurai, Kazuhisa; M$"u$ller, M.*; Mikeska, H.-J.*

Physical Review B, 65(9), p.094426_1 - 094426_7, 2002/03

 Times Cited Count:90 Percentile:93.54(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Magnetic excitatioins in the edge-sharing CuO$$_{2}$$ chain

Matsuda, Masaaki

Proceedings of Workshop on the Perspectives in Single Crystal Neutron Spectroscopy (SCNS 2002) (CD-ROM), 6 Pages, 2002/00

no abstracts in English

Journal Articles

Magnetic excitations in the quantum spin system NH$$_{4}$$CuCl$$_{3}$$

Osawa, Akira; Ono, Toshio*; Kakurai, Kazuhisa; Tanaka, Hidekazu*

Proceedings of Workshop on the Perspectives in Single Crystal Neutron Spectroscopy (SCNS 2002) (CD-ROM), 4 Pages, 2002/00

no abstracts in English

Journal Articles

Magnetic excitations from the edge-sharing CuO$$_{2}$$ chains in Ca$$_{2}$$Y$$_{2}$$Cu$$_{5}$$O$$_{10}$$

Matsuda, Masaaki; Yamaguchi, Hirotaka*; Ito, Toshimitsu*; Le, C.*; Oka, Kunihiko*; Mizuno, Yoshiaki*; Toyama, T.*; Maekawa, Sadamichi*; Kakurai, Kazuhisa*

Physical Review B, 63(18), p.180403_1 - 180403_4, 2001/05

 Times Cited Count:25 Percentile:75.01(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Superconducting energy gap observed in the magnetic excitation spectra of a heavy fermion superconductor UPd$$_{2}$$Al$$_{3}$$

Metoki, Naoto; Haga, Yoshinori; Koike, Yoshihiro*; Onuki, Yoshichika*

Physical Review Letters, 80(24), p.5417 - 5420, 1998/06

 Times Cited Count:98 Percentile:92.56(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Magnetic excitations in TbZn

; ;

J.Magn.Magn.Mater., 15-18(PART.1), p.377 - 378, 1980/00

no abstracts in English

Oral presentation

Spin-phonon coupling in high-$$T_c$$ cuprate superconductors

Wakimoto, Shuichi

no journal, , 

no abstracts in English

28 (Records 1-20 displayed on this page)