9 research outputs found
Epitaxially Stabilized EuMoO3: A New Itinerant Ferromagnet
Synthesizing metastable phase often opens new functions in materials but is a
challenging topic. Thin film techniques have advantages to form materials which
do not exist in nature since nonequilibrium processes are frequently utilized.
In this study, we successfully synthesize epitaxially stabilized new compound
of perovskite Eu2+Mo4+O3 as a thin film form by a pulsed laser deposition.
Analogous perovskite SrMoO3 is a highly conducting paramagnetic material, but
Eu2+ and Mo4+ are not compatible in equilibrium and previous study found more
stable pyrochlore Eu23+Mo24+O7 prefers to form. By using isostructural
perovskite substrates, the gain of the interface energy between the film and
the substrate stabilizes the matastable EuMoO3 phase. This compound exhibits
high conductivity and large magnetic moment, originating from Mo 4d2 electrons
and Eu 4f7 electrons, respectively. Our result indi-cates the epitaxial
stabilization is effective not only to stabilize crystallographic structures
but also to from a new compound which contains unstable combinations of ionic
valences in bulk form.Comment: 7 pages, 9 figure
Recent Results from LHD Experiment with Emphasis on Relation to Theory from Experimentalist’s View
he Large Helical Device (LHD) has been extending an operational regime of net-current free plasmas towardsthe fusion relevant condition with taking advantage of a net current-free heliotron concept and employing a superconducting coil system. Heating capability has exceeded 10 MW and the central ion and electron temperatureshave reached 7 and 10 keV, respectively. The maximum value of β and pulse length have been extended to 3.2% and 150 s, respectively. Many encouraging physical findings have been obtained. Topics from recent experiments, which should be emphasized from the aspect of theoretical approaches, are reviewed. Those are (1) Prominent features in the inward shifted configuration, i.e., mitigation of an ideal interchange mode in the configuration with magnetic hill, and confinement improvement due to suppression of both anomalous and neoclassical transport, (2) Demonstration ofbifurcation of radial electric field and associated formation of an internal transport barrier, and (3) Dynamics of magnetic islands and clarification of the role of separatrix
Vertical Clustering of 3D Elliptical Helical Data
Abstract-This research proposes an effective vertical clustering strategy of 3D data in an elliptical helical shape based on 2D geometry. The clustering object is an elliptical cross-sectioned metal pipe which is been bended in to an elliptical helical shape which is used in wearable muscle support designing for welfare industry. The aim of this proposed method is to maximize the vertical clustering (vertical partitioning) ability of surface data in order to run the product evaluation process addressed in research [2]. The experiment results prove that the proposed method outperforms the existing threshold no of clusters that preserves the vertical shape than applying the conventional 3D data. This research also proposes a new product testing strategy that provides the flexibility in computer aided testing by not restricting the sequence depending measurements which apply weight on measuring process. The clustering algorithms used for the experiments in this research are self-organizing map (SOM) and K-medoids
Epitaxially Stabilized EuMoO<sub>3</sub>: A New Itinerant Ferromagnet
Synthesizing metastable phases often open new functions
in materials,
but it is a challenging topic. Thin film techniques have advantages
to form materials which do not exist in nature since nonequilibrium
processes are frequently utilized. In this study, we successfully
synthesize an epitaxially stabilized new compound of perovskite Eu<sup>2+</sup>Mo<sup>4+</sup>O<sub>3</sub> as a thin film form by a pulsed
laser deposition. The analogous perovskite SrMoO<sub>3</sub> is a
highly conducting paramagnetic material, but Eu<sup>2+</sup> and Mo<sup>4+</sup> are not compatible in equilibrium, and a previous study
found that the more stable pyrochlore Eu<sub>2</sub><sup>3+</sup>Mo<sub>2</sub><sup>4+</sup>O<sub>7</sub> prefers to form. By using isostructural
perovskite substrates, the gain of the interface energy between the
film and the substrate stabilizes the matastable EuMoO<sub>3</sub> phase. This compound exhibits high conductivity and large magnetic
moment, originating from Mo 4d<sup>2</sup> electrons and Eu 4f<sup>7</sup> electrons, respectively. Our result indicates the epitaxial
stabilization is effective not only to stabilize crystallographic
structures but also to form a new compound which contains unstable
combinations of ionic valences in bulk form