Zobrazeno 1 - 10
of 87
pro vyhledávání: '"Atsushi Asamitsu"'
Publikováno v:
Physica C: Superconductivity and its Applications. 530:31-34
We investigated the in-plane anisotropy of the thermopower and electrical resistivity on detwinned single crystals of BaFe 2 As 2 . The in-plane anisotropy of the resistivity was clearly observed far above the magnetostructural transition temperature
Publikováno v:
Journal of Physics and Chemistry of Solids. 72:552-555
We have investigated three-dimensional electronic structure for Na x CoO 2 ( x =0.77 and 0.65) by high-resolution angle-resolved photoemission spectroscopy to study the origin of antiferromagnetic (AF) transition of highly doped Na x CoO 2 ( x > 0.75
Autor:
Daniel Andreica, Eduardo J. Ansaldo, Kim H. Chow, Kazuhiko Mukai, Jun Sugiyama, Takenori Fujii, Atsushi Asamitsu, Kingo Ariyoshi, Tsutomu Ohzuku, Hiroshi Nozaki, Jess H. Brewer, Anthony A. Amato, Peter L. Russo, Yutaka Ikedo
Publikováno v:
Journal of Materials Science: Materials in Electronics. 19:883-893
In order to elucidate the nature of layered cobalt dioxides A x CoO2, we have investigated their microscopic magnetism by means of positive muon-spin rotation and relaxation (μ+SR) spectroscopy, in particular for A = Li, Na, and K and x = 0.5. It wa
Publikováno v:
Journal of Alloys and Compounds. 326:27-35
We have studied the phenomena relevant to charge/orbital ordering in perovskite manganites. In the three bandwidth controlled systems, La 0.7 (Sr 1− y Ca y ) 0.3 MnO 3 ( x =0.3), (Nd 1− y Sm y ) 0.55 Sr 0.45 MnO 3 ( x =0.45), and Pr 0.65 (Sr 1−
Autor:
Hirofumi Hazama, Terutaka Goto, Yoshinori Tokura, Yasuhide Tomioka, Yuichi Nemoto, Atsushi Asamitsu
Publikováno v:
Physical Review B. 62:15012-15020
Elastic properties of the perovskite manganite ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{MnO}}_{3}(x=0.12,0.165,0.3)$ with both orbital and charge degrees of freedom have been investigated by means of ultrasonic measurements. Above t
Publikováno v:
Journal of the Physical Society of Japan. 69:3614-3620
Optical spectra for the ferromagnetic ground states have been investigated for single crystals of perovskite-type manganese oxides La 1- x Sr x MnO 3 with finely varying hole-doping concentration ( x ) around the metal-insulator (MI) phase boundary (
Publikováno v:
Physical Review B. 61:8009-8015
We have investigated, in single crystals of ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Ca}}_{x}{\mathrm{MnO}}_{3},$ the insulator-metal (IM) transition at the ground state induced by carrier doping or applying pressure around the critical doping level
Publikováno v:
Physical Review Letters. 82:4316-4319
Below the N\`eel temperature $({T}_{N})$ a layered antiferromagnetic (AF) ${\mathrm{Nd}}_{0.45}{\mathrm{Sr}}_{0.55}{\mathrm{MnO}}_{3}$ crystal is metallic within the ferromagnetic (F) layers ( $\mathrm{ab}$ plane), while insulating along the AF-coupl
Autor:
Atsushi Asamitsu, Hong Ding, Takenori Fujii, Takashi Takahashi, Takafumi Sato, Toshiyuki Arakane
Publikováno v:
Physica B: Condensed Matter. 403:1086-1088
We have performed high-resolution angle-resolved photoemission spectroscopy on M,COO, (M: Na, K, Rb) to clarify the band dispersion and Fermi surface inherent to CoO2 plane. We have found that a(1g) band which forms a large hexagonal Fermi surface ce
Publikováno v:
Physical Review Letters. 81:5920-5923
Magnetoelastic phenomena correlated with magnetoresistive ones have been investigated for bilayered manganite crystals, ${\mathrm{La}}_{2\ensuremath{-}2x}{\mathrm{Sr}}_{1+2x}{\mathrm{Mn}}_{2}{\mathrm{O}}_{7}$ ( $0.3\ensuremath{\le}x\ensuremath{\le}0.