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Journal Articles

Magnetic and electronic properties of URu$$_2$$Si$$_2$$ revealed by comparison with nonmagnetic references ThRu$$_2$$Si$$_2$$ and LaRu$$_2$$Si$$_2$$

Emi, Naoya*; Hamabata, Ryosuke*; Nakayama, Daisuke*; Miki, Toshihiro*; Koyama, Takehide*; Ueda, Koichi*; Mito, Takeshi*; Kohori, Yo*; Matsumoto, Yuji*; Haga, Yoshinori; et al.

Journal of the Physical Society of Japan, 84(6), p.063702_1 - 063702_4, 2015/06

 Times Cited Count:10 Percentile:64.05(Physics, Multidisciplinary)

Journal Articles

Kondo interactions from band reconstruction in YbInCu$$_4$$

Jarrige, I.*; Kotani, Akio*; Yamaoka, Hitoshi*; Tsujii, Naohito*; Ishii, Kenji; Upton, M.*; Casa, D.*; Kim, J. H.*; Gog, T.*; Hancock, J. N.*

Physical Review Letters, 114(12), p.126401_1 - 126401_5, 2015/03

 Times Cited Count:8 Percentile:58.5(Physics, Multidisciplinary)

Journal Articles

Inelastic neutron scattering study of the spin-gap cuprate $$beta$$-AgCuPO$$_{4}$$

Hase, Masashi*; Matsuda, Masaaki; Kakurai, Kazuhisa; Ozawa, Kiyoshi*; Kitazawa, Hideaki*; Tsujii, Naohito*; D$"o$nni, A.*; Kuroe, Haruhiko*

Physical Review B, 76(13), p.134403_1 - 34403_5, 2007/10

 Times Cited Count:2 Percentile:13.24(Materials Science, Multidisciplinary)

The magnetism of $$beta$$-AgCuPO$$_{4}$$ has been studied using inelastic neutron scattering and magnetic susceptibility measurements on powder sample. A well-defined symmetric broad inelastic peak was observed at 6.2meV energy transfer, indicating the existence of spin-gap excitation. From the Q-dependence of the inelastic magnetic intensities it is concluded that the strongest exchange interaction exists in the Cu-O-P-O-Cu path and that the antiferromagnetic alternating chain model with two exchange interactions values of 80 and 14K can quantitatively explain the experimental results.

Journal Articles

Direct observation of the energy gap generating the 1/3 magnetization plateau in the spin-1/2 trimer chain compound Cu$$_{3}$$(P$$_{2}$$O$$_{6}$$OD)$$_{2}$$ by inelastic neutron scattering measurements

Hase, Masashi*; Matsuda, Masaaki; Kakurai, Kazuhisa; Ozawa, Kiyoshi*; Kitazawa, Hideaki*; Tsujii, Naohito*; D$"o$nni, A.*; Kono, Masanori*; Hu, X.*

Physical Review B, 76(6), p.064431_1 - 064431_5, 2007/08

 Times Cited Count:23 Percentile:69.29(Materials Science, Multidisciplinary)

The magnetism of spin-1/2 trimer chain system Cu$$_{3}$$(P$$_{2}$$O$$_{6}$$OD)$$_{2}$$ is studied by means of inelastic neutron scattering. A spin excitation gap of 9.8meV corresponding to singlet -triplet excitation is observed and together with the magnetization plateau data the AF exchange interaction parameters of the trimer system could be determined as J$$_{1}$$=111K and J$$_{2}$$=30K.

Oral presentation

Neutron scattering study toward to development of energy-efficient environment-friendly refrigeration technology

Kitazawa, Hideaki*; Kawamura, Yukihiko*; Mamiya, Hiroaki*; Terada, Noriki*; Suzuki, Hiroyuki*; Tsujii, Naohito*; Doenni, A.*; Kaneko, Koji; Metoki, Naoto; Igawa, Naoki; et al.

no journal, , 

In this paper, we will demonstrate some application of neutron scattering for magnetic refrigerant materials Ho$$_5$$Pd$$_2$$ and dilute spinel ferrites. In order to determine the magnetic structure, we have performed neutron powder diffraction experiments at JRR-3. The magnetic peaks with a propagation vector k = (0.18, 0.18, 0.18) are gradually developing. The peak width is significantly broader even 5 K, indicating a short-range order with a long wave length.

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