Faculty Profiles - HASEGAWA, Masashi

Papers - HASEGAWA, Masashi

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高圧力下での結晶成長 Invited Reviewed

長谷川正，島村清史

日本結晶成長学会誌 Vol. 38 page： 3 - 3 2011

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流体中での結晶成長 Invited Reviewed Open Access

長谷川正，丹羽健

日本結晶成長学会誌 Vol. 38 page： 4-11 2011

高圧力下における結晶成長・高圧発生技術と評価 Invited Reviewed

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 Vol. 132 page： 1-9 2011

Submicron Rectangular Hollow Tube Crystals of Rutile-type GeO2 Reviewed

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

J. Cryst. Growth Vol. 312 page： 1731-1735 2010

超高圧高温窒素超臨界流体を用いた金属窒化物の合成 Invited Reviewed

長谷川正

JascoReport 超臨界最新技術特集 Vol. 10 page： 22-27 2010

Quantum-limit convergence of strange and conventional metal states of high-Tc superconductors at heavy doping Reviewed

L. K.-Elbaumm, T. Shibauchi, Y. Kasahara, R. Okazaki, Y. Matsuda, R. McDonald, C. Mielke, M. Hasegawa

Physica C Vol. 493 page： 15 - 17 2010

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

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

Vol. B82 page： 144530/1-7 2010

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 Invited Reviewed

長谷川正

JascoReport 超臨界最新技術特集 Vol. 10 page： 17-21 2010

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

K. Niwa, M. Hasegawa and T. Yagi

J. Alloys Comp. Vol. 477 page： 493-497 2009

超高圧超高温下での合成と結晶成長 Invited Reviewed

長谷川正,丹羽健

マテリアルインテグレーション Vol. 22 page： 32-37 2009

Hydrogen-Induced High Damping of Bulk Metallic Glasses Invited Reviewed

M. Hasegawa

Mater. Sci. Eng. Vol. A 521-522 page： 354-358 2009

Electronic structure of Zr-based metallic glasses Invited Reviewed

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

J. Alloys Compd. Vol. 483 page： 638-641 2009

Formation of nano size Si-particles from silicon monoxide decomposition Reviewed

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

Phys. Chem. News Vol. 44 page： 27-31 2008

Field-induced Quantum Critical Route to a Fermi Liquid in High Temperature Superconductors Reviewed

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 Vol. 105 page： 7120-7123 2008

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

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

Mater. Sci. Eng. A Vol. 494 page： 299-303 2008

Compression behaviour and pressure-induced strain of icosahedral Zn-Mg-Y quasicrystal Reviewed Open Access

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

J. Phys. Vol. CS92 page： 012184/1-4 2007

Phonon dispersion of metallic glass CuZr2 Reviewed Open Access

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. Vol. CS92 page： 012136/1-4 2007

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

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. Vol. 879 page： 1821-1824 2007

New La nitrides in high pressure and temperature Reviewed

M. Hasegawa, K. Niwa and T. Yagi

Solid State Commun. Vol. 141 page： 267-272 2007

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

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 Reviewed

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

J. Alloys and Compd. Vol. 434 page： 149-151 2007

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

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.

DOI： 10.1016/j.jallcom.2006.08.277

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