68 citations · 258 across the 23 of their papers we have counts for
23 papers
X-ray free-electron laser observation of giant and anisotropic magnetostriction in -O at 110 Tesla
Akihiko Ikeda, Yuya Kubota, Yuto Ishii +18
In strong magnetic fields beyond 100 T, the significant Zeeman energy competes with the lattice interactions, where a considerable magnetostriction is expected. However, the micros…
Ultrasound measurement technique for the single-turn-coil magnets
T. Nomura, A. Hauspurg, D. I. Gorbunov +7
Ultrasound is a powerful means to study numerous phenomena of condensed-matter physics as acoustic waves couple strongly to structural, magnetic, orbital, and charge degrees of fre…
Distinctive Doping Dependence of Upper Critical Field in Iron-Based Superconductor LaFeAsOH
Shiro Kawachi, Jun-ichi Yamaura, Yoshio Kuramoto +7
High magnetic fields up to 105 T have been utilized in deriving the upper critical field of LaFeAsOH throughout whole temperatures below . Resis…
Radio Frequency Electrical Resistance Measurement under Destructive Pulsed Magnetic Fields
T. Shitaokoshi, S. Kawachi, T. Nomura +2
We developed a resistance measurement using radio frequency reflection to investigate the electrical transport characteristics under destructive pulsed magnetic fields above 100 T.…
High-field phase diagram of the chiral-lattice antiferromagnet Sr(TiO)Cu4(PO4)4
Toshihiro Nomura, Yasuyuki Kato, Yukitoshi Motome +9
High-field phase diagram of a chiral-lattice antiferromagnet Sr(TiO)Cu4(PO4)4 is studied by means of the ultrasound, dielectric, and magnetocaloric-effect measurements. These exper…
Unveiling new quantum phases in the Shastry-Sutherland compound SrCu2(BO3)2up to the saturation magnetic field
T. Nomura, P. Corboz, A. Miyata +8
Under magnetic fields, quantum magnets often undergo exotic phase transitions with various kinds of order. The discovery of a sequence of fractional magnetization plateaus in the S…
Ferroelectric transition of a chiral molecular crystal BINOL2DMSO
Toshihiro Nomura, Takeshi Yajima, Zhuo Yang +7
We report dielectric, thermodynamical, acoustic, and optical properties of a chiral molecular crystal, 1,1'-bi-2-naphthol 2-dimethylsulfoxide (BINOL2DMSO). We find two successive p…
Magnetically hidden state on the ground floor of the magnetic Devil's staircase
Shusaku Imajo, Naofumi Matsuyama, Toshihiro Nomura +10
We investigated the low-temperature and high-field thermodynamic and ultrasonic properties of SrCu2(BO3)2, which exhibits various plateaux in its magnetization curve above 27~T, ca…
Emergent anisotropy in the Fulde-Ferrell-Larkin-Ovchinnikov state
Shusaku Imajo, Toshihiro Nomura, Yoshimitsu Kohama +1
Exotic superconductivity is formed by unconventional electron pairing and exhibits various unique properties that cannot be explained by the basic theory. The Fulde-Ferrell-Larkin-…
Physical properties of liquid oxygen under ultrahigh magnetic fields
T. Nomura, A. Ikeda, M. Gen +8
We studied the acoustic properties of liquid oxygen up to 90 T by means of ultrasound measurements. We observed a monotonic decrease of the sound velocity and an asymptotic increas…
High-mobility two-dimensional carriers from surface Fermi arcs in magnetic Weyl semimetal films
Shingo Kaneta-Takada, Yuki K. Wakabayashi, Yoshiharu Krockenberger +10
High-mobility two-dimensional carriers originating from surface Fermi arcs in magnetic Weyl semimetals are highly desired for accessing exotic quantum transport phenomena and for t…
Higher magnetic-field generation by a mass-loaded single-turn coil
M. Gen, A. Ikeda, S. Kawachi +4
Single-turn coil (STC) technique is a convenient way to generate ultrahigh magnetic fields of more than 100 T. During the field generation, the STC explosively destructs outward du…
Field-induced valence fluctuation in YbB
R. Kurihara, A. Miyake, M. Tokunaga +8
We performed high-magnetic-field ultrasonic experiments on YbB up to 59 T to investigate the valence fluctuations in Yb ions. In zero field, the longitudinal elastic constan…
Crystal-Field Paschen-Back Effect on Ruby in Ultrahigh Magnetic Fields
Masaki Gen, Tomoki Kanda, Takashi Shitaokoshi +2
Zeeman spectra of the R lines of ruby (Cr: -AlO) were studied in ultrahigh magnetic fields up to 230 T by magneto-photoluminescence measurements. The observed…
Symmetry lowering on the field-induced commensurate phase in CeRhIn
Tomoki Kanda, Koki Arashima, Yusuke Hirose +4
Temperature dependence of the In-NMR spectra of CeRhIn is studied with the external magnetic fields 10 off the [100] and [001] axes. Our detailed analyses confi…
Precursor of a magnetic-field-induced liquid-liquid transition of oxygen
T. Nomura, Y. H. Matsuda, S. Zherlitsyn +2
The acoustic properties of liquid oxygen have been studied up to 90 T by means of the ultrasound pulse-echo technique. A monotonic decrease of the sound velocity and an asymptotic…
Magnetostriction studies up to megagauss fields using fiber Bragg grating technique
Akihiko Ikeda, Yasuhiro H. Matsuda, Daisuke Nakamura +13
We here report magnetostriction measurements under pulsed megagauss fields using a high-speed 100 MHz strain monitoring system devised using fiber Bragg grating (FBG) technique wit…
100 MHz high-speed strain monitor using fiber Bragg grating and optical filter applied for magnetostriction measurements of cobaltite at magnetic fields beyond 100 T
Akihiko Ikeda, Toshihiro Nomura, Yasuhiro H. Matsuda +4
High-speed 100 MHz strain monitor using fiber Bragg grating (FBG) and an optical filter has been devised for the magnetostriction measurements under ultrahigh magnetic fields. The…
- phase diagram of solid oxygen
Toshihiro Nomura, Yasuhiro H. Matsuda, Tatsuo C. Kobayashi
Comprehensive magnetic-field-temperature (-) phase diagram of solid oxygen including the phase is discussed in the context of the ultrahigh-field measurement and the magn…
High-speed 100 MHz strain monitor using fiber Bragg grating and optical filter for magnetostriction measurements under ultrahigh magnetic fields
Akihiko Ikeda, Toshihiro Nomura, Yasuhiro H. Matsuda +4
A high-speed 100 MHz strain monitor using a fiber Bragg grating, an optical filter, and a mode-locked optical fiber laser has been devised, which has a resolution of $ΔL/L\sim10^{-…
- and - phase boundaries of solid oxygen observed by adiabatic magnetocaloric effect
Toshihiro Nomura, Yoshimitsu Kohama, Yasuhiro H. Matsuda +2
The magnetic-field-temperature phase diagram of solid oxygen is investigated by the adiabatic magnetocaloric effect (MCE) measurement with pulsed magnetic fields. Relatively large…
Irreversible Heating Measurement with Microsecond Pulse Magnet: Example of the alpha-theta Phase Transition of Solid Oxygen
Toshihiro Nomura, Yasuhiro H. Matsuda, Shojiro Takeyama +1
Dissipation inevitably occurs in first order phase transitions, leading to the irreversible heating. Conversely, the irreversible heating effect could be a clue for the first order…
Spin state ordering of strongly correlating LaCoO induced at ultrahigh magnetic fields
Akihiko Ikeda, Toshihiro Nomura, Yasuhiro H. Matsuda +3
Magnetization measurements of LaCoO have been carried out up to 133 T generated with a destructive pulse magnet at a wide temperature range from 2 to 120 K. A novel magnetic…