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Journal Articles

Anisotropic thermal lattice expansion and crystallographic structure of strontium aluminide within Al-10Sr alloy as measured by in-situ neutron diffraction

Liss, K.-D.*; Harjo, S.; Kawasaki, Takuro; Aizawa, Kazuya; Xu, P. G.

Journal of Alloys and Compounds, 869, p.159232_1 - 159232_9, 2021/07

Journal Articles

Dielectric and magnetocaloric study of TmCrO$$_{3}$$

Yoshii, Kenji; Ikeda, Naoshi*

Journal of Alloys and Compounds, 804, p.364 - 369, 2019/10

 Times Cited Count:4 Percentile:41.94(Chemistry, Physical)

Dielectric and magnetocaloric measurements are carried out for the chromite TmCrO$$_{3}$$. This oxide was reported to be multiferroic below the N$'e$el temperature ($$T_{rm N}$$) of 125 K, likely due to a structural transformation. The dielectric response shows large dielectric constants below 300 K. However, from the analyses of loss tangent, AC conductivity and dielectric modulus, this behavior is rooted in hopping of charge carriers rather than electric dipoles, as proposed for some other chromites. No dielectric anomaly is found at $$T_{rm N}$$. The magnetocaloric effect shows that the magnetic transitions at $$T_{rm N}$$ as well as the spin reorientation temperature are of a second order. This result strongly suggests the absence of magnetostructural transition at $$T_{rm N}$$ in accord with no observation of ferroelectric transition at this temperature.

Journal Articles

Anomalous ferromagnetic ordering in EuCuP

Iha, Wataru*; Kakihana, Masashi*; Matsuda, Shinya*; Honda, Fuminori*; Haga, Yoshinori; Takeuchi, Tetsuya*; Nakashima, Miho*; Amako, Yasushi*; Gochi, Jun*; Uwatoko, Yoshiya*; et al.

Journal of Alloys and Compounds, 788, p.361 - 366, 2019/06

 Times Cited Count:2 Percentile:64.55(Chemistry, Physical)

Journal Articles

Abnormally enhanced diamagnetism in Al-Zn-Mg alloys

Nishimura, Katsuhiko*; Matsuda, Kenji*; Lee, S.*; Nunomura, Norio*; Shimano, Tomoki*; Bendo, A.*; Watanabe, Katsumi*; Tsuchiya, Taiki*; Namiki, Takahiro*; Toda, Hiroyuki*; et al.

Journal of Alloys and Compounds, 774, p.405 - 409, 2019/02

 Times Cited Count:2 Percentile:64.55(Chemistry, Physical)

Journal Articles

Temperature stability of PIN-PMN-PT ternary ceramics during pyroelectric power generation

Moro, Takuya*; Kim, J.*; Yamanaka, Satoru*; Murayama, Ichiro*; Kato, Takanori*; Nakayama, Tadachika*; Takeda, Masatoshi*; Yamada, Noboru*; Nishihata, Yasuo; Fukuda, Tatsuo; et al.

Journal of Alloys and Compounds, 768, p.22 - 27, 2018/11

 Times Cited Count:8 Percentile:33.51(Chemistry, Physical)

Journal Articles

Impurity effects in the microscopic elastic properties of polycrystalline Mg-Zn-Y alloys with a synchronised long-period stacking ordered phase

Hosokawa, Shinya*; Kimura, Koji*; Yamasaki, Michiaki*; Kawamura, Yoshihito*; Yoshida, Koji*; Inui, Masanori*; Tsutsui, Satoshi*; Baron, A. Q. R.*; Kawakita, Yukinobu; Ito, Shinichi*

Journal of Alloys and Compounds, 695, p.426 - 432, 2017/02

 Times Cited Count:3 Percentile:72.06(Chemistry, Physical)

Journal Articles

Hydrogenation of $$L$$1$$_{2}$$-type AlNi$$_{3}$$ alloy at high pressure and temperature

Endo, Naruki*; Saito, Hiroyuki; Machida, Akihiko; Katayama, Yoshinori

Journal of Alloys and Compounds, 645(Suppl.1), p.S61 - S63, 2015/10

 Times Cited Count:0 Percentile:100(Chemistry, Physical)

Journal Articles

Synthesis of Be-Ti-V ternary beryllium intermetallic compounds

Kim, Jae-Hwan; Nakamichi, Masaru

Journal of Alloys and Compounds, 640, p.285 - 289, 2015/08

 Times Cited Count:1 Percentile:90.81(Chemistry, Physical)

Journal Articles

Comparative study of sinterability and thermal stability in plasma-sintered niobium and vanadium beryllides

Kim, Jae-Hwan; Nakamichi, Masaru

Journal of Alloys and Compounds, 638, p.277 - 281, 2015/07

 Times Cited Count:3 Percentile:75.42(Chemistry, Physical)

Journal Articles

Preliminary synthesis and mechanical property of titanium beryllide pebbles with different chemical compositions

Kim, Jae-Hwan; Nakamichi, Masaru

Journal of Alloys and Compounds, 585, p.63 - 68, 2014/02

 Times Cited Count:11 Percentile:41.38(Chemistry, Physical)

Journal Articles

Synergic effects of ion irradiations (La, Ce) and alkaline pretreatment (KOH) on hydriding kinetic property of a Mm-Ni based alloy

Abe, Hiroshi; Aone, Shigeo*; Morimoto, Ryo*; Uchida, Hirohisa*

Journal of Alloys and Compounds, 580(Suppl.1), p.S219 - S221, 2013/12

 Times Cited Count:5 Percentile:62.11(Chemistry, Physical)

no abstracts in English

Journal Articles

In situ synchrotron $$^{57}$$Fe M$"o$ssbauer spectroscopy of RFe$$_{2}$$ (R = Y, Gd) hydrides synthesized under ultra-high-pressure hydrogen

Mitsui, Takaya; Masuda, Ryo*; Seto, Makoto; Hirao, Naohisa*; Matsuoka, Takehiro*; Nakamura, Yumiko*; Sakaki, Koji*; Enoki, Hirotoshi*

Journal of Alloys and Compounds, 580(Suppl.1), p.S264 - S267, 2013/12

 Times Cited Count:4 Percentile:67.44(Chemistry, Physical)

Journal Articles

Epitaxial transformation of hcp-fcc Ti sublattices during nitriding processes of evaporated-Ti thin films due to nitrogen-implantation

Chen, Y.*; Feng, X.*; Kasukabe, Yoshitaka*; Yamamoto, Shunya; Yoshikawa, Masahito; Fujino, Yutaka*

Journal of Alloys and Compounds, 577(Suppl.1), p.S18 - S24, 2013/11

 Times Cited Count:0 Percentile:100(Chemistry, Physical)

Epitaxial transformation processes of titanium films due to Nitrogen-implantation have been clarified through in-situ observations by using transmission electron microscope(TEM)and electron energy loss spectroscope, along with molecular orbital calculations. The N$$_{2}$$$$^{+}$$ ions with 62 keV are implanted into as-deposited Ti films which consist of hcp-Ti and TiH$$_{x}$$ with preferred orientations, in the 400 kV analytic high resolution TEM combined with ion accelerators at JAEA Takasaki. Thus, titanium nitride (TiN$$_{y}$$) films with preferred orientations are epitaxially formed by the inheritance of partial atomic arrangement of hcp-Ti or TiH$$_{x}$$ in as-deposited Ti films and by the occupation of octahedral sites by N atoms, which elucidates that epitaxial transformation of hcp-fcc Ti sublattices occurs.

Journal Articles

Optimization of synthesis conditions for plasma-sintered beryllium-titanium intermetallic compounds

Kim, Jae-Hwan; Nakamichi, Masaru

Journal of Alloys and Compounds, 577, p.90 - 96, 2013/11

 Times Cited Count:7 Percentile:53.67(Chemistry, Physical)

Journal Articles

Sinterability and mechanical properties of plasma-sintered beryllides with different Ti contents

Kim, Jae-Hwan; Nakamichi, Masaru

Journal of Alloys and Compounds, 556, p.292 - 295, 2013/04

 Times Cited Count:12 Percentile:38.21(Chemistry, Physical)

Journal Articles

Comparative study on arc-melted and plasma-sintered beryllides

Kim, Jae-Hwan; Nakamichi, Masaru

Journal of Alloys and Compounds, 546, p.171 - 175, 2013/01

 Times Cited Count:12 Percentile:38.21(Chemistry, Physical)

Journal Articles

Phase diagram and equation of state of TiH$$_{2}$$ at high pressures and high temperatures

Endo, Naruki; Saito, Hiroyuki; Machida, Akihiko; Katayama, Yoshinori; Aoki, Katsutoshi

Journal of Alloys and Compounds, 546, p.270 - 274, 2013/01

 Times Cited Count:6 Percentile:57.49(Chemistry, Physical)

Journal Articles

Fast and real-time observation of hydrogen absorption kinetics for palladium nanoparticles

Matsumura, Daiju; Okajima, Yuka*; Nishihata, Yasuo; Mizuki, Junichiro

Journal of Alloys and Compounds, 509(Suppl.2), p.S849 - S852, 2011/09

 Times Cited Count:9 Percentile:46.93(Chemistry, Physical)

Dynamical structural change of Pd nanoparticles during hydrogen absorption was directly observed by X-ray absorption fine structure with dispersive optics. Hydrogen pressure dependence of the expansion of the interatomic distance in Pd nanoparticles was estimated by real-time-resolved observation with a rate of 50 Hz. It has been revealed that the Pd nanoparticles show strong hydrogen pressure dependence of the reaction rate. Determined reaction order implies that the surface dissociative adsorption process is the key issue for the hydrogen storage kinetics.

Journal Articles

Relativistic density-functional study of solid solubitilty of tansiton metal/$$gamma$$-uranium alloys; The Roll of d-d orbital interactions

Kurihara, Masayoshi*; Onoe, Jun*; Hirata, Masaru; Suzuki, Chikashi

Journal of Alloys and Compounds, 509(4), p.1152 - 1156, 2011/01

 Times Cited Count:2 Percentile:78.8(Chemistry, Physical)

The alloying behavior of transition metals (TMs) in solid $$gamma$$-phase uranium ($$gamma$$-U), which is expected to be used as fuel for next-generation nuclear reactors, is investigated using the discrete-variational Dirac-Fock-Slater molecular orbital method. Using a model cluster, U$$_{8}$$/TM, as the minimum unit of $$gamma$$-U/TM alloys, we evaluate the d-orbital energy of the TM (Md), the bond order between the TM and U atoms, and the orbital overlap population (OOP) between the atomic orbitals of the TM and U atoms. We subsequently examine the effect of these quantities on the maximum solid solubility (MSS) of the $$gamma$$-U/TM alloys. Md and the OOP (U 6d-TM d) exhibit good correlations with the MSS for $$gamma$$-U/TM alloys, so that the interaction between the U-6d and TM-d atomic orbitals is found to play a key role in determining the MSS of the $$gamma$$-U/TM alloys. The magnitude of the MSS can be explained in terms of the stabilization energy caused by U 6d-TM d orbital interactions for $$gamma$$ -U/TM alloys, which is affected by the Md and the OOP. The exponential dependence of the MSS on Md and the OOP is explained in terms of the equilibrium constant obtained using a substitution cluster model for $$gamma$$-U/TM alloys. We also map the MSS of $$gamma$$-U/TM alloys using the Md and the OOP as the alloying parameters. These results will assist the quantum design of nuclear fuel materials for other alloy systems besides the present alloy system.

Journal Articles

Controls of chromium and third element contents in nickel-base alloys for corrosion resistant alloys in hot HNO$$_3$$-HF mixtures

Takeuchi, Masayuki; Nakajima, Yasuo; Hoshino, Kuniyoshi*; Kawamura, Fumio*

Journal of Alloys and Compounds, 506(1), p.194 - 200, 2010/09

 Times Cited Count:7 Percentile:54.95(Chemistry, Physical)

158 (Records 1-20 displayed on this page)