Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
O
Matsuda, Masaaki; Chung, J.-H.*; Park, S.*; Sato, Taku*; Matsuno, Kenichiro*; Katori, Hiroko*; Takagi, Hidenori*; Kakurai, Kazuhisa; Kamazawa, Kazuya*; Tsunoda, Yorihiko*; et al.
Europhysics Letters, 82(3), p.37006_1 - 37006_5, 2008/05
Times Cited Count：21 Percentile：71.02(Physics, Multidisciplinary)Recently, two consecutive phase transitions were observed, upon cooling, in an antiferromagnetic spinel GeNiO at 
K and 
K, respectively. Using unpolarized and polarized elastic neutron scattering we show that the two transitions are due to the existence of frustrated minority spins in this compound. Upon cooling, at 
the spins on the 
111
kagom
planes order ferromagnetically in the plane and antiferromagnetically between the planes (phase I), leaving the spins on the 111 triangular planes that separate the kagom planes frustrated and disordered. At the lower 
, the triangular spins also order in the 111 plane (phase II). We also present a scenario involving exchange interactions that qualitatively explains the origin of the two purely magnetic phase transitions.
Mashimo, Tsutomu; Ono, Masao; Huang, X. S.*; Iguchi, Yusuke*; Okayasu, Satoru; Kobayashi, Katsura*; Nakamura, Eizo*
Europhysics Letters, 81(5), p.56002_1 - 56002_4, 2008/03
Times Cited Count：12 Percentile：59.49(Physics, Multidisciplinary)A strong gravitational field resulted in the gravity-induced diffusion (sedimentation) of isotope atoms in monoatomic solid Se. The layer crystalline morphology consisting of three zones of the fine-grained crystals, the long crystals and feather-shaped crystals grown parallel to gravity direction appeared in the specimen ultracentrifuged at 0.8-1 million G and at 190 
C. Change in concentration ratio 
Se/
Se of 0.8% was observed in the grown crystalline region. These results show an evidence for sedimentation of substitutional atoms in solid via self-diffusion, and suggest possibility of application to control of impurity and crystalline state as well as to isotope separation.
Matsushita, Tomohiro*; Yoshigoe, Akitaka; Agui, Akane
Europhysics Letters, 71(4), p.597 - 603, 2005/08
Times Cited Count：31 Percentile：76.75(Physics, Multidisciplinary)no abstracts in English
Wang, W. H.*; Utsumi, Wataru; Wang, X. L.*
Europhysics Letters, 71(4), p.611 - 617, 2005/08
Times Cited Count：6 Percentile：41.61(Physics, Multidisciplinary)The crystallization kinetics and nucleation mechanism of a bulk metallic glassforming alloy Zr
Ti
Cu
Ni
Be
(vit4) in the entire supercooled liquid region (SLR) is investigated using in situ high-pressure and high-temperature X-ray diffraction with synchrotron radiation, which allows us for the time to simultaneously determine the crystallization kinetics and phase evolution of a metallic liquid as a function of time under high pressure. The results are summarized in a pressure-time-temperature-transformation (PTTT) diagram with two time scales.
Matsushita, Tomohiro*; Agui, Akane; Yoshigoe, Akitaka
Europhysics Letters, 65(2), p.207 - 213, 2004/01
Times Cited Count：31 Percentile：76.56(Physics, Multidisciplinary)A "scattering pattern matrix" method is proposed here to overcome the difculties presented by photoelectron holography, such as forward-scattering and multi-energyproblems. This method makes it possible to reconstruct a three-dimensional atomic arrangement from a single-energy hologram. We have utilized the "scattering pattern matrix" that includes the angular variation of the scattered object waves, and we have adopted a specialaverage process and the gradient projection method for minimizing the mean-squared error. The reconstruction of the Si bulk structure is demonstrated by using an experimental Si(111) 2s single-energy hologram.
; G.Kahl*
Europhysics Letters, 18(5), p.421 - 426, 1992/03
Times Cited Count：19 Percentile：72.95(Physics, Multidisciplinary)no abstracts in English
