73 citations · 513 across the 37 of their papers we have counts for
20 papers · 1 filter
Unified Description of Spin-Lattice Coupling and Thermodynamics in the Pyrochlore Heisenberg Antiferromagnet
Masaki Gen, Hidemaro Suwa, Shusaku Imajo +6
We study an extended model to describe the spin-lattice coupling, incorporating individual vibrations of bonds and atomic sites alongside distance-dependent exchange interactions.…
Large magnetostriction and first-order phase transition induced by ultrahigh magnetic fields in VO
Yuto Ishii, Akihiko Ikeda, Yasuhiro. H. Matsuda
VO exhibits the metal-insulator transition (MIT) at around 150 K with the formation of vanadium-vanadium (V-V) dimers. We measured the magnetostriction of VO…
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…
Crystal-field magnetostriction of the spin ice under ultrahigh magnetic fields
Nan Tang, Masaki Gen, Martin Rotter +9
We present a comprehensive study of the magnetoelastic properties of the Ising pyrochlore oxide HoTiO, known as spin ice, by means of high-field magnetostriction…
A review on magnetic field induced spin crossover in LaCoO up to 600 T
Akihiko Ikeda, Yasuhiro H. Matsuda, Keisuke Sato +1
\lco{} is known for its two-step spin crossover as a function of temperature. Despite efforts spanning over half a century, the origin of this phenomenon is still debated, particul…
Magnetic field induced valence change in Eu(CoNi)P up to 60 T
Raito Nakamura, Azumi Ishita, Jin Nakamura +8
The solid solution 122 compounds, Eu(CoNi)P, show valence transition between divalent state and intermediate valence states at Eu, which is firmly correla…
Anisotropic magnetotransport properties coupled with spiral spin modulation in a triangular-lattice magnet EuZnGe
Takashi Kurumaji, Masaki Gen, Shunsuke Kitou +3
We investigate the thermodynamic, magnetic, and electrical transport properties of a triangular-lattice antiferromagnet EuZnGe using single crystals grown from Eu-Zn flux in sealed…
Rhombic skyrmion lattice coupled with orthorhombic structural distortion in EuAl
Masaki Gen, Rina Takagi, Yoshito Watanabe +9
The centrosymmetric tetragonal itinerant magnet EuAl exhibits an intricate magnetic phase diagram including rhombic and square skyrmion-lattice (SkL) phases in the external m…
Magnetovolume Effect on the First-Order Metamagnetic Transition in UTe
Atsushi Miyake, Masaki Gen, Akihiko Ikeda +10
The link between the metamagnetic transition and novel spin-triplet superconductivity of UTe was discussed thermodynamically through magnetostriction measurements in a pulsed-m…
Generating 77 T using a portable pulse magnet for single shot quantum beam experiments
Akihiko Ikeda, Yasuhiro H. Matsuda, Xuguang Zhou +8
We devised a portable system that generates pulsed high magnetic fields up to 77 T with 3 s duration. The system employs the single turn coil method, a destructive way of field…
Signature of spin-triplet exciton condensations in LaCoO at ultrahigh magnetic fields up to 600 T
Akihiko Ikeda, Yasuhiro H. Matsuda, Keisuke Sato +5
Bose-Einstein condensation of electron-hole pairs, exciton condensation, has been effortfully investigated since predicted 60 years ago. Irrefutable evidence has still been lacking…
Complex magnetic phase diagram with a small phase pocket in a three-dimensional frustrated magnet CuInCrS
M. Gen, H. Ishikawa, A. Ikeda +13
Frustrated magnets with a strong spin-lattice coupling can show rich magnetic phases and the associated fascinating phenomena. A promising platform is the breathing pyrochlore magn…
Gradual charge order melting in Bi0.5Ca0.5MnO3 induced by ultrahigh magnetic field
Y. Ishii, A. Ikeda, M. Tokunaga +3
We have investigated the magnetic properties of Bi0.5Ca0.5MnO3 under ultrahigh magnetic fields by magnetization measurements. This compound shows the metamagnetic transition which…
Phase transition in the 5d1 double perovskite Ba2CaReO6 induced by high magnetic field
Hajime Ishikawa, Daigorou Hirai, Akihiko Ikeda +6
Magnetic properties of an antiferromagnetic double perovskite oxide Ba2CaReO6, where Re6+ (5d1) ions with large spin-orbit coupling are arranged on the face-centered-cubic lattice,…
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…
Two Spin-State Crystallizations in LaCoO
Akihiko Ikeda, Yasuhiro H. Matsuda, Keisuke Sato
We report a magnetostriction study of a perovskite above 100 T using our state-of-the-art strain gauge to investigate an interplay between electron correlations an…
Magnetic-field-induced insulator-metal transition in W-doped VO2 at 500 T
Yasuhiro H. Matsuda, Daisuke Nakamura, Akihiko Ikeda +3
Metal-insulator (MI) transitions in correlated electron systems have long been a central and controversial issue in material science. Vanadium dioxide (VO2) exhibits a first-order…
Magnetoelastic couplings in the deformed Kagomé quantum spin lattice of volborthite
Akihiko Ikeda, Shunsuke Furukawa, Oleg Janson +5
Microscopic spin interactions on a deformed Kagomé lattice of volborthite are investigated through magnetoelastic couplings. A negative longitudinal magnetostriction in the…
Magnetic-field-induced spin crossover of Y-doped PrCaCoO
Akihiko Ikeda, Suyeon Lee, Taku T. Terashima +3
The family of hole-doped Pr-based perovskite cobaltites, PrCaCoO and (PrRE)CaCoO (where RE is rare earth) has recently bee…
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…