Yasuyuki Ishii

  • 353 Citations
  • 9 h-Index
20002019
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Research Output 2000 2019

  • 353 Citations
  • 9 h-Index
  • 53 Article
  • 1 Conference contribution
  • 1 Conference article
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Article
2018
2 Citations (Scopus)

Zero-field spin structure and spin reorientations in layered organic antiferromagnet, κ-(BEDT-TTF)2Cu[N(CN)2]Cl, with dzyaloshinskii–moriya interaction

Ishikawa, R., Tsunakawa, H., Oinuma, K., Michimura, S., Taniguchi, H., Satoh, K., Ishii, Y. & Okamoto, H., 2018 Jan 1, In : Journal of the Physical Society of Japan. 87, 6, 064701.

Research output: Contribution to journalArticle

retraining
interactions
magnetic fields
magnetization
moments
2017
1 Citation (Scopus)

μsR Study of Organic Superconductor λ-(BETS)2GaCl4

Sari, D. P., Asih, R., Mohm-Tajudin, S. S., Adam, N., Hiraki, K., Ishii, Y., Takahashi, T., Nakano, T., Nozue, Y., Sulaiman, S., Mohamed-Ibrahim, M. I. & Watanabe, I., 2017 May 20, In : IOP Conference Series: Materials Science and Engineering. 196, 1, 012047.

Research output: Contribution to journalArticle

Relaxation time
Superconducting materials
Superconducting transition temperature
Anions
Volume fraction
2016
1 Citation (Scopus)

Studies on magnetism of the layered organic antiferromagnet bordered on a superconducting phase by muon spin rotation and magnetization measurements

Uehara, T., Ito, M., Angel, J., Shimada, J., Komakine, N., Tsuchiya, T., Taniguchi, H., Satoh, K., Triyana, K., Ishii, Y. & Watanabe, I., 2016 Feb 15, In : Journal of the Physical Society of Japan. 85, 2, e024710.

Research output: Contribution to journalArticle

muon spin rotation
magnetization
muons
transition temperature
nuclear magnetic resonance
2015
12 Citations (Scopus)

Universality class of the Mott transition

Abdel-Jawad, M., Kato, R., Watanabe, I., Tajima, N. & Ishii, Y., 2015 Mar 11, In : Physical Review Letters. 114, 10, 106401.

Research output: Contribution to journalArticle

conductivity
pressure dependence
conductors
insulators
exponents
5 Citations (Scopus)

Zero-field magnetism of a two-dimensional antiferromagnet, κ-(BEDT-TTF)<inf>2</inf>Cu[N(CN)<inf>2</inf>]Cl, determined by muon spin rotation and magnetization measurements

Ito, M., Uehara, T., Taniguchi, H., Satoh, K., Ishii, Y. & Watanabe, I., 2015 May 15, In : Journal of the Physical Society of Japan. 84, 5, 053703.

Research output: Contribution to journalArticle

muon spin rotation
precession
magnetization
muons
interlayers
2014
4 Citations (Scopus)

Development of spatial inhomogeneity of internal magnetic field above Tcin Bi2Sr2Ca1-xYxCu2O8+δ Observed by longitudinal-field muon Spin relaxation 074707

Tanabe, Y., Adachi, T., Suzuki, K. M., Akoshima, M., Heguri, S., Kawamata, T., Ishii, Y., Suzuki, T., Watanabe, I. & Koike, Y., 2014 Jul 15, In : Journal of the Physical Society of Japan. 83, 7, 074707.

Research output: Contribution to journalArticle

muons
inhomogeneity
magnetic fields
transition temperature
temperature
1 Citation (Scopus)

Gradual evolution in spin dynamics of TlCu1-xMg xCl3 probed by muon-spin-relaxation (μSR) technique

Suzuki, T., Watanabe, I., Yamada, F., Ishii, Y., Ohishi, K., Goto, T. & Tanaka, H., 2014, In : Journal of Physics: Conference Series. 502, 1, 012041.

Research output: Contribution to journalArticle

spin dynamics
muons
relaxation time
magnetic properties
impurities
2013
6 Citations (Scopus)

Muon spin relaxation study of spin-glass freezing in the Heusler compound Ru1.9Fe0.1CrSi

Hiroi, M., Hisamatsu, T., Suzuki, T., Ohishi, K., Ishii, Y. & Watanabe, I., 2013 Jul 12, In : Physical Review B - Condensed Matter and Materials Physics. 88, 2, 024409.

Research output: Contribution to journalArticle

Spin glass
Freezing
spin glass
freezing
muons
2012
5 Citations (Scopus)

Distinct Fe-induced magnetic states in the underdoped and overdoped regimes of La 2-xSr xCu 1-yFe yO 4 revealed by muon spin relaxation

Suzuki, K. M., Adachi, T., Tanabe, Y., Sato, H., Koike, Y., Risdiana, Ishii, Y., Suzuki, T. & Watanabe, I., 2012 Jul 27, In : Physical Review B - Condensed Matter and Materials Physics. 86, 1, 014522.

Research output: Contribution to journalArticle

Hole concentration
muons
Substitution reactions
Fermi liquids
Spin glass
2 Citations (Scopus)

Fe-substitution Effects on the Cu-spin Correlation in La2-xSrxCu1-yFeyO4 Studied by Muon Spin Relaxation

Suzuki, K., Adachi, T., Tanabe, Y., Sato, H., Risdiana, Ishii, Y., Suzuki, T., Watanabe, I. & Koike, Y., 2012, In : Unknown Journal. 30, p. 275-278 4 p.

Research output: Contribution to journalArticle

muons
substitutes
spin dynamics
cuprates
superconductivity
1 Citation (Scopus)

Flux-line lattice state in FeAs-based superconductor KFe2As 2

Ohishi, K., Ishii, Y., Watanabe, I., Fukazawa, H., Saito, T., Kohori, Y., Kihou, K., Lee, C. H., Kito, H., Iyo, A. & Eisaki, H., 2012, In : Journal of Physics: Conference Series. 400, PART 2, 022087.

Research output: Contribution to journalArticle

muon spin rotation
penetration
vortices
iron
temperature dependence
2 Citations (Scopus)

Magnetic penetration depth in the FeAs-based superconductor KFe 2As2

Ohishi, K., Ishii, Y., Watanabe, I., Fukazawa, H., Saito, T., Kohori, Y., Kihou, K., Lee, C. H., Kito, H., Iyo, A. & Eisaki, H., 2012 Sep, In : Journal of the Physical Society of Japan. 81, SUPPL.B, SB046.

Research output: Contribution to journalArticle

penetration
muon spin rotation
vortices
iron
temperature dependence
28 Citations (Scopus)

Microscopic phase separation in triangular-lattice quantum spin magnetκ-(BEDT-TTF) 2Cu 2(CN) 3 probed by muon spin relaxation

Nakajima, S., Suzuki, T., Ishii, Y., Ohishi, K., Watanabe, I., Goto, T., Oosawa, A., Yoneyama, N., Kobayashi, N., Pratt, F. L. & Sasaki, T., 2012 Jun, In : Journal of the Physical Society of Japan. 81, 6, 063706.

Research output: Contribution to journalArticle

muons
magnets
ground state
frustration
spin dynamics
2011
3 Citations (Scopus)

Change in magnetic ground states in nonmagnetic-impurity-doped spin-gap systems TlCu1-xMgxCl3 using muon spin relaxation

Suzuki, T., Yamada, M., Ishii, Y., Watanabe, I., Goto, T., Tanaka, H. & Kubo, K., 2011 May 23, In : Physical Review B - Condensed Matter and Materials Physics. 83, 17, 174436.

Research output: Contribution to journalArticle

Ground state
muons
Impurities
Magnetic fields
impurities
2 Citations (Scopus)

Fast spin fluctuation viewed by muon spin relaxation in optimally doped and overdoped iron-based oxypnictide superconductors LaFeAsO1-xF x

Ohishi, K., Ishii, Y., Miyazawa, K., Fukazawa, H., Watanabe, I., Kohori, Y., Shirage, P. M., Kito, H., Iyo, A. & Eisaki, H., 2011 Feb, In : Journal of the Physical Society of Japan. 80, 2, 024703.

Research output: Contribution to journalArticle

muons
iron
spin dynamics
Fermi surfaces
superconductivity

Nano-micro Processing of Epoxy Resin Systems by Ion Beam Lithography with Multiple Energies and Species

Takano, K., Satoh, T., Ishii, Y., Koka, M., Kamiya, T., Ohkubo, T., Sugimoto, M., Nishikawa, H. & Seki, S., 2011 Sep 1, In : Transactions of the Materials Research Society of Japan. 36, p. 305-308

Research output: Contribution to journalArticle

1 Citation (Scopus)

Study on the pressure induced charge transfer phase transition in (C 5H11)4N(FeIIFeIII(C 2O2S2)3) by means of μsR spectroscopy

Enomoto, M., Kida, N., Kojima, N., Watanabe, I., Suzuki, T. & Ishii, Y., 2011 Nov 28, In : Polyhedron. 30, 18, p. 3137-3139 3 p.

Research output: Contribution to journalArticle

Charge transfer
Phase transitions
charge transfer
Spectroscopy
spectroscopy
2010
4 Citations (Scopus)

Completely hydrostatic pressure effect of anisotropic resistivity in the 1-D organic conductor (TMTTF)2SbF6

Itoi, M., Ishii, Y., Takekoshi, S., Kitano, H., Matsubayashi, K., Uwatoko, Y. & Nakamura, T., 2010 Dec, In : Physica C: Superconductivity and its Applications. 470, SUPPL.1

Research output: Contribution to journalArticle

Organic conductors
Pressure effects
Hydrostatic pressure
pressure effects
hydrostatic pressure

Controlling Spatial Curing Reactions of Epoxy Resin Systems on Ion Beam Writing

Takano, K., Satoh, T., Koka, M., Kamiya, T., Ishii, Y., Ohkubo, T., Sugimoto, M., Nishikawa, H. & Seki, S., 2010 Jul 1, In : 12th International Conference on Nuclear Microprobe Technology and Applications, Book of Abstracts. p. 173

Research output: Contribution to journalArticle

5 Citations (Scopus)

Field and temperature dependent charge transport characteristics in regio-regular Poly(3-octylthiophene-2,5-diyl) studied by Muon Spin relaxation

Risdiana, Fitrilawati, Siregar, R. E., Hidayat, R., Nugroho, A. A., Tjia, M. O., Ishii, Y. & Watanabe, I., 2010, In : Journal of Physics: Conference Series. 225, 012003.

Research output: Contribution to journalArticle

muons
temperature
spin dynamics
depolarization
crossovers

Local Nano-processing of Epoxy Resin Systems by Single Ion Hits with Writing

Takano, K., Satoh, T., Ishii, Y., Kamiya, T., Ohkubo, T., Koka, M., Sugimoto, M., Seki, S. & Nishikawa, H., 2010 Jul 1, In : 12th International Conference on Nuclear Microprobe Technology and Applications, Book of Abstracts. p. 133

Research output: Contribution to journalArticle

2 Citations (Scopus)

Low-energy spin dynamics in randomness-introduced spin-gap systems

Suzuki, T., Yamada, F., Yamada, M., Kawamata, T., Ishii, Y., Watanabe, I., Goto, T. & Tanaka, H., 2010 Sep 29, In : Physical Review B - Condensed Matter and Materials Physics. 82, 9, 094447.

Research output: Contribution to journalArticle

Spin dynamics
spin dynamics
muons
Spin fluctuations
Glass

Microbeam Complex in TIARA: Technologies to Meet Wide Range of Applications

Kamiya, T., Takano, K., Satoh, T., Ishii, Y., Okumura, S., Nishikawa, H., Seki, S., Sugimoto, M., Yokota, W. & Fukuda, M., 2010 Jul 1, In : 12th International Conference on Nuclear Microprobe Technology and Applications, Book of Abstracts. p. 40

Research output: Contribution to journalArticle

2 Citations (Scopus)

Pressure effect on magnetic ground states in Tl(Cu1-xMg x)Cl3 with x = 0.015 probed by muon-spin-rotation

Suzuki, T., Watanabe, I., Yamada, F., Ishii, Y., Ohishi, K., Risdiana, Goto, T. & Tanaka, H., 2010, In : Journal of Physics: Conference Series. 200, SECTION 2, 022061.

Research output: Contribution to journalArticle

muon spin rotation
pressure effects
ground state
hydrostatic pressure
crossovers
2 Citations (Scopus)

Pressure-induced new magnetic phase in Tl(Cu0.985Mg 0.015)Cl3 probed by muon spin rotation

Suzuki, T., Watanabe, I., Yamada, F., Yamada, M., Ishii, Y., Kawamata, T., Goto, T. & Tanaka, H., 2010, In : Journal of Physics: Conference Series. 225, 012054.

Research output: Contribution to journalArticle

muon spin rotation
muons
precession
hydrostatic pressure
low pressure
1 Citation (Scopus)

Zero field- and longitudinal field-μSR studies of quasi-one-dimensional organic conductor, TMTTF 2PF 6

Ishii, Y., Nagasawa, M., Suzuki, T., Watanabe, I., Matsuzaki, T., Yamamoto, H. M. & Kato, R., 2010 Jun 1, In : Physica B: Condensed Matter. 405, 11 SUPPL.

Research output: Contribution to journalArticle

Organic conductors
Depolarization
Superconducting transition temperature
conductors
muons
2009
4 Citations (Scopus)

Coexistence of superconductivity and magnetism in the Tm-based reentrant superconductor TmsRhôSnis

Kase, N., Akimitsu, J., Ishii, Y., Suzuki, T., Watanabe, I., Miyazaki, M., Hiraishi, M., Takeshita, S. & Kadono, R., 2009 Jul, In : Journal of the Physical Society of Japan. 78, 7, 073708.

Research output: Contribution to journalArticle

superconductivity
magnetic fields
thulium
magnetic measurement
magnetic properties

Coexistence of superconductivity and magnetism in the Tm-based superconductor probed by muon spin relaxation

Kase, N., Akimitsu, J., Ishii, Y., Suzuki, T., Watanabe, I., Miyazaki, M., Hiraishi, M., Takeshita, S. & Kadono, R., 2009 Apr 15, In : Physica B: Condensed Matter. 404, 5-7, p. 740-742 3 p.

Research output: Contribution to journalArticle

Magnetism
Superconductivity
Superconducting materials
muons
Thulium
7 Citations (Scopus)

Development of a gas-pressurized high-pressure μSR setup at the RIKEN-RAL Muon Facility

Watanabe, I., Ishii, Y., Kawamata, T., Suzuki, T., Pratt, F. L., Done, R., Chowdhury, M., Goodway, C., Dreyer, J., Smith, C. & Southern, M., 2009 Apr 15, In : Physica B: Condensed Matter. 404, 5-7, p. 993-995 3 p.

Research output: Contribution to journalArticle

muons
Gases
gases
cryostats
Helium
8 Citations (Scopus)

Evidence for continuous change of spin states between impurity-induced order and pressure-induced order in TlCu0.985 Mg0.015 Cl3 probed via muon spin rotation

Suzuki, T., Watanabe, I., Yamada, F., Ishii, Y., Ohishi, K., Risdiana, Goto, T. & Tanaka, H., 2009 Aug 13, In : Physical Review B - Condensed Matter and Materials Physics. 80, 6, 064407.

Research output: Contribution to journalArticle

muon spin rotation
Impurities
impurities
muons
precession

Micro-Nano Lithography by MeV Ion Beam Writing

Takano, K., Satoh, T., Ishii, Y., Kamiya, T., Ohkubo, T., Sugimoto, M., Koka, M., Nishikawa, H. & Seki, S., 2009 Sep 1, In : Proceedings of the 16th International Conference on Surface Modification of Materials by Ion Beams (SMMIB2009-September 13-18, 2009).

Research output: Contribution to journalArticle

Muon spin relaxation in hydrogen tungsten bronze

Mihara, M., Shimomura, K., Watanabe, I., Ishii, Y., Suzuki, T., Kawamata, T., Komurasaki, J., Nishimura, D., Nishiyama, K., Kadono, R., Takai, S. & Nakano, T., 2009 Apr 15, In : Physica B: Condensed Matter. 404, 5-7, p. 801-803 3 p.

Research output: Contribution to journalArticle

Tungsten
Bronze
bronzes
Hydrogen
muons
2008
13 Citations (Scopus)

Electrical properties and electronic states of molecular conductors based on unsymmetrical organometallic-dithiolene gold(III) complexes

Kubo, K., Nakao, A., Ishii, Y., Yamamoto, T., Tamura, M., Kato, R., Yakushi, K. & Matsubayashi, G. E., 2008 Jun 16, In : Inorganic Chemistry. 47, 12, p. 5495-5502 8 p.

Research output: Contribution to journalArticle

Electronic states
Organometallics
Gold
Metal insulator boundaries
Electric properties
4 Citations (Scopus)

Pressure-induced reentrant oblique antiferromagnetic phase in the spin-dimer system TlCuCl3

Yamada, F., Ishii, Y., Suzuki, T., Matsuzaki, T. & Tanaka, H., 2008 Dec 1, In : Physical Review B - Condensed Matter and Materials Physics. 78, 22, 224405.

Research output: Contribution to journalArticle

Dimers
Phase transitions
dimers
Hydrostatic pressure
moments
2007
22 Citations (Scopus)

Magnetic study of pressure-induced superconductivity in the [Pd(dmit) 2] salt with spin-gapped ground state

Ishii, Y., Tamura, M. & Kato, R., 2007 Mar, In : Journal of the Physical Society of Japan. 76, 3, 033704.

Research output: Contribution to journalArticle

superconductivity
salts
ground state
valence
thiols
4 Citations (Scopus)

Magnetic study of quantum triangular antiferromagnet [Pd(dmit)2 ] salts under pressure

Tamura, M., Ishii, Y. & Kato, R., 2007 Apr 11, In : Journal of Physics Condensed Matter. 19, 14, 145239.

Research output: Contribution to journalArticle

Salts
salts
magnetic permeability
Magnetic susceptibility
Ground state
2006

An interlayer magnetoresistance peak effect below the superconducting transition temperature in Et 2Me 2 P[Pd(dmit) 2] 2

Ishii, Y., Tajima, N., Tamura, M. & Kato, R., 2006 Feb, In : Journal of Low Temperature Physics. 142, 3-4, p. 515-518 4 p.

Research output: Contribution to journalArticle

Magnetoresistance
Hydrostatic pressure
Superconducting materials
Superconducting transition temperature
interlayers

High-pressure study of a doped-type organic superconductor, κ-(BEDT-TTF) 4Hg 2.89Br 8

Okuhata, T., Nagai, T., Taniguchi, H., Satoh, K., Itou, T., Shimizu, Y., Miyagawa, K., Ishii, Y., Tajima, N. & Kato, R., 2006 Feb, In : Journal of Low Temperature Physics. 142, 3-4, p. 551-554 4 p.

Research output: Contribution to journalArticle

organic superconductors
Superconducting materials
salts
electrical resistivity
electrons
2 Citations (Scopus)

Two electrically different molecular conductors based on unsymmetrical Au(III)-Dithiolene complexes with similar crystal structures

Kubo, K., Nakao, A., Ishii, Y., Tamura, M., Kato, R. & Matsubayashi, G. E., 2006 Feb, In : Journal of Low Temperature Physics. 142, 3-4, p. 417-420 4 p.

Research output: Contribution to journalArticle

Band structure
Cations
conductors
Crystal structure
Positive ions
2005
18 Citations (Scopus)

A relation between the vacancy concentration and hydrogen concentration in the Ni-H, Co-H and Pd-H systems

Harada, S., Yokota, S., Ishii, Y., Shizuku, Y., Kanazawa, M. & Fukai, Y., 2005 Dec 8, In : Journal of Alloys and Compounds. 404-406, SPEC. ISS., p. 247-251 5 p.

Research output: Contribution to journalArticle

Vacancies
Hydrogen
Crystal lattices
Temperature
3 Citations (Scopus)

Effect of hydrostatic pressure on molecular conductors, Pd(dmit) 2 salts

Ishii, Y., Tamura, M., Kato, R., Hedo, M., Uwatoko, Y. & Môri, N., 2005 Sep 20, In : Synthetic Metals. 152, 1-3, p. 389-392 4 p.

Research output: Contribution to journalArticle

Hydrostatic pressure
hydrostatic pressure
conductors
Salts
salts
7 Citations (Scopus)

High-pressure study up to 9.9 GPa of organic Mott insulator, β′-(BEDT-TTF)2AuCl2

Taniguchi, H., Miyashita, M., Uchiyama, K., Sato, R., Ishii, Y., Satoh, K., Môri, N., Hedo, M. & Uwatoko, Y., 2005 May, In : Journal of the Physical Society of Japan. 74, 5, p. 1370-1373 4 p.

Research output: Contribution to journalArticle

superconductivity
insulators
salts
electrical resistivity
anvils
6 Citations (Scopus)

Structures and electrical conductivities of cation radical salts based on unsymmetrical [Au(III)(C-N)(S-S)] type dithiolate complexes

Kubo, K., Nakao, A., Ishii, Y., Kato, R. & Matsubayashi, G. E., 2005 Sep 21, In : Synthetic Metals. 153, 1-3, p. 425-428 4 p.

Research output: Contribution to journalArticle

Cations
Salts
Positive ions
salts
cations
2004
1 Citation (Scopus)

High-field magnetization and other physical properties of Ce 2T3X5 compounds (T=Pd, Rh and Cu; X=Si and A1)

Ishii, Y., Kosaka, M., Abe, H., Kitazawa, H., Kido, G. & Uwatoko, Y., 2004 Jun, In : Journal of Magnetism and Magnetic Materials. 277, 1-2, p. 60-63 4 p.

Research output: Contribution to journalArticle

Magnetization
Physical properties
physical properties
magnetization
Atoms
2003
21 Citations (Scopus)

Ferromagnetism induced in UCoAl under uniaxial pressure

Ishii, Y., Kosaka, M., Uwatoko, Y., Andreev, A. V. & Sechovský, V., 2003, In : Physica B: Condensed Matter. 334, 1-2, p. 160-166 7 p.

Research output: Contribution to journalArticle

Ferromagnetism
ferromagnetism
Magnetism
Hydrostatic pressure
hydrostatic pressure
2002
13 Citations (Scopus)

Evidence of the anisotropically developed antiferromagnetic spin fluctuation in CeFe2 under high pressures

Fujiwara, T., Fujii, H., Ishii, Y., Koiwai, S., Kosaka, M., Uwatoko, Y., Nishi, M. & Kakurai, K., 2002 Mar, In : Physica B: Condensed Matter. 312-313, p. 336-338 3 p.

Research output: Contribution to journalArticle

Spin fluctuations
Hydrostatic pressure
hydrostatic pressure
Magnetization
magnetization
9 Citations (Scopus)

Ferromagnetism induced in UCoAl by uniaxial pressure

Sechovský, V., Andreev, A. V., Ishii, Y., Kosaka, M. & Uwatoko, Y., 2002 Apr, In : High Pressure Research. 22, 1, p. 155-158 4 p.

Research output: Contribution to journalArticle

ferromagnetism
paramagnetism
hydrostatics
hydrostatic pressure
alloying