研究者詳細 - 長谷川　正

論文 - 長谷川　正

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高圧力下における結晶成長・高圧発生技術と評価招待有り査読有り

長谷川正，草場啓治，丹羽健

応用物理学会結晶工学分科会第132回研究会テキスト 132 巻頁： 1-9 2011年

Submicron Rectangular Hollow Tube Crystals of Rutile-type GeO2 査読有り

K. Niwa, H.Ikegaya, M.Hasegawa, T.Ohsuna, T.Yagi

J. Cryst. Growth 312 巻頁： 1731-1735 2010年

超高圧高温窒素超臨界流体を用いた金属窒化物の合成招待有り査読有り

長谷川正

JascoReport 超臨界最新技術特集 10 巻頁： 22-27 2010年

Interlayer magnetotransport in the overdoped cuprate Tl2Ba2CuO6+x: Quantum critical point and its downslide in an applied magnetic field 査読有り

L. Krusin-Elbaum, T. Shibauchi, Y. Kasahara, R. Okazaki, Y. Matsuda, R. D. McDonald, C. H. Mielke and M. Hasegawa

B82 巻頁： 144530/1-7 2010年

ダイアモンドアンビルセルとレーザー加熱を用いた超高圧超高温超臨界水中での結晶成長招待有り査読有り

長谷川正

JascoReport 超臨界最新技術特集 10 巻頁： 17-21 2010年

Synthesis of Ln nitrides (Ln = Ce, Pr, Gd, Lu) in high pressure and temperature 査読有り

K. Niwa, M. Hasegawa and T. Yagi

J. Alloys Comp. 477 巻頁： 493-497 2009年

超高圧超高温下での合成と結晶成長招待有り査読有り

長谷川正,丹羽健

マテリアルインテグレーション 22 巻頁： 32-37 2009年

Hydrogen-Induced High Damping of Bulk Metallic Glasses 招待有り査読有り

M. Hasegawa

Mater. Sci. Eng. A 521-522 巻頁： 354-358 2009年

Electronic structure of Zr-based metallic glasses 招待有り査読有り

M. Hasegawa, H. Sato, T. Takeuchi, K. Soda, U. Mizutani

J. Alloys Compd. 483 巻頁： 638-641 2009年

Formation of nano size Si-particles from silicon monoxide decomposition 査読有り

M. Kikuchi, M. Mamiya, M. Hasegawa, H. Takei, T. Atou, K. Fukuoka, S. Ito, M. Mansori, H. Faqir and M. Kawasaki

Phys. Chem. News 44 巻頁： 27-31 2008年

Field-induced Quantum Critical Route to a Fermi Liquid in High Temperature Superconductors 査読有り

T. Shibauchi, L. K.-Elbaum, M. Hasegawa, Y. Kasahara, R. Okazaki and Y. Matsuda

Proceedings of the National Academy of Sciences of the United States of America 105 巻頁： 7120-7123 2008年

High specic strength Mg-based bulk metallic glass matrix composite highly ductilized by Ti dispersoid 査読有り

M. Kinaka, H. Kato, M. Hasegawa, A. Inoue

Mater. Sci. Eng. A 494 巻頁： 299-303 2008年

Compression behaviour and pressure-induced strain of icosahedral Zn-Mg-Y quasicrystal 査読有り

M. Hasegawa, A. P. Tsai and T. Yagi

J. Phys. CS92 巻頁： 012184/1-4 2007年

Phonon dispersion of metallic glass CuZr2 査読有り

S. Nakashima, Y. Kawakita, T. Otomo, R. Suenaga, A. Q. R. Baron, S. Tsutsui,S. Kohara, S. Takeda, K. Itoh, H. Kato, T. Fukunaga and M. Hasegawa

J. Phys. CS92 巻頁： 012136/1-4 2007年

Electronic Structure of Pd- and Zr-based Bulk Metallic Glasses Studied by Use of Hard X-ray Photoelectron Spectroscopy 査読有り

K. Soda, S. Ota, T. Suzuki, H. Miyazaki, M. Inukai, M. Kato, S. Yagi, T. Takeuchi, M. Hasegawa, H. Sato and U. Mizutani

AIP Conf. Proc. 879 巻頁： 1821-1824 2007年

New La nitrides in high pressure and temperature 査読有り

M. Hasegawa, K. Niwa and T. Yagi

Solid State Commun. 141 巻頁： 267-272 2007年

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

We succeeded in synthesizing two new lanthanum nitrides in a supercritical nitrogen fluid at high pressure (about 30 GPa) and high temperature (about 2000 K), using a diamond anvil cell and a YAG laser heating system. These nitrides were found to be stable down to 5 GPa and similar to 300 K in a nitrogen atmosphere. One of the new lanthanum nitrides is a cubic P lattice-type phase, which is a main phase synthesized nitride. The calculated lattice parameter is a = 11.979 angstrom at 5 GPa, 300 K. The other nitride is of a trigonal P lattice-type. The calculated lattice parameters are a = 3.889 angstrom and c = 6.691 angstrom at 5 GPa, 300 K. The most likely phase of the former new La nitride is Pa (3) over bar La2N3+delta, the structure of which may be similar to the Ia (3) over bar Mn2O3-type (Ia80). The phase of the latter nitride is P (3) over bar ml La2N3+delta, the structure of which is the same as the P (3) over bar ml La2O3-type (hP5).

Stability and electronic structure of Zr-based ternary metallic glasses and relevant compounds 査読有り

M. Hasegawa, K. Soda, H. Sato, T. Taketomi, T. Takeuchi, H. Kato and U. Mizutani

J. Alloys and Compd. 434 巻頁： 149-151 2007年

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

The electronic structure of the Zr-based metallic glasses has been investigated by theoretical and experimental approaches. One approach is band calculations of the Zr2Ni (Zr66.7Ni33.3) compound to investigate the electronic structure of the Zr66.7Ni33.3 metallic glass (Delta T-x = 0 K) of which the local atomic structure is similar to that of the Zr2Ni compound. The other is photoemission spectroscopy of the Zr50Cu35Al15 bulk metallic glass (BMG) (Delta T-x = 69 K). Here Delta T-x = T-x - T-x where T-x and T-g are crystallization and glass transition temperature, respectively. Both results and previous ones on the Zr55Cu30Ni5Al10 BMG indicate that there is a pseudogap at the Fermi level in the electronic structure of these Zr-based metallic glasses, independent of the value of the Delta T-x. This implies that the pseudogap at the Fermi level is one of the factors that stabilize the glass phase of Zr-based metallic glasses.

Internal friction induced by interstitial atoms in multicomponent glassy alloy and composite 招待有り査読有り

M. Hasegawa, M. Takeuchi, D. Nagata, T. Wada, H. Kato, Y. Yamaura and A. Inoue

J. Alloys and Compd. 434 巻頁： 196-198 2007年

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

Effects of the 2 at% addition on the stability and hydrogen-induced internal friction behavior of the Ti34Zr11Cu47Ni8 multicomponent glassy alloy have been investigated. Thermal analysis indicates that the supercooled liquid region decreases by adding Nb, indicating that 2 at % Nb addition reduces glass forming ability. On the other hand, there is no effect of the Nb addition on the hydrogen content dependence of the peak internal friction and the peak temperature. Nb has no attractive interaction with Ti and Zr but is attracted to Ni atoms. The contrasting effects of Nb addition are thus attributable to its alternative effects on the local atomic structure, i.e. no effect of Nb on the local atomic structure around Ti and Zr having high affinity with hydrogen but strong effect on the environment of Ni.

Electronic structure and phase stability of glassy alloys 招待有り査読有り

M. Hasegawa, T. Takeuchi, K. Soda, H. Sato and U. Mizutani

Mater. Sci. Forum 539-543 巻頁： 2048-2053 2007年

Local atomic arrangements and electronic structure of the Zr-Ni-Al bulk metallic glass. “Analysis by use of the relevant crystals" 査読有り

T. Takeuchi, S. Nakano, M. Hasegawa, K. Soda, H. Sato, U. Mizutani, K. Itoh and T. Fukunaga

Mater. Sci. Eng. A 449 巻頁： 599-604 2007年

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