Disorder-sensitive superconductivity in the iron silicide Lu2_2Fe3_3Si5_5 studied by the Lu-site substitutions

We studied effect of non-magnetic and magnetic impurities on superconductivity in Lu$_2$Fe$_3$Si$_5$ by small amount substitution of the Lu site, which investigated structural, magnetic, and electrical properties of non-magnetic (Lu$_{1-x}$Sc$_x$)$_2$Fe$_3$Si$_5$, (Lu$_{1-x}$Y$_x$)$_2$Fe$_3$Si$_5$, and magnetic (Lu$_{1-x}$Dy$_x$)$_2$Fe$_3$Si$_5$. The rapid depression of $T_c$ by non-magnetic impurities in accordance with the increase of residual resistivity reveals the strong pair breaking dominated by disorder. We provide compelling evidence for the sign reversal of the superconducting order parameter in Lu$_2$Fe$_3$Si$_5$.Comment: 4 pages, 5 figure

Using ultrasonography in evaluating the intramuscular injection techniques used for administering drug treatments to schizophrenic patients in Japan

This study was conducted with six patients with schizophrenia, four of whom received the atypical antipsychotic risperidone long-acting injectable (RLAI), and two patients receiving the typical depot injection (TDI). The purpose of this study was to determine the location (gluteus medius or maximus ; deltoid muscles) and diffusion of typical and atypical antipsychotic medications administered intramuscularly using ultrasonography. When using the standardized depth of needle insertion, in some cases, the drug was injected into the gluteus maximus instead of the gluteus medius. Similarly, in some cases the TDI was not visible in the ultrasonographic images until sixteen days after the injection. This verifies how hard the injection site becomes when microspheres of RLAI is injected as compared to other muscle areas. These results confirmed that the gluteus muscle structure was the ideal muscle for depot injection as evidenced by the injection solution being dispersed and rendered not visible immediately after intramuscular injection (IM). With the use of ultrasonography, injection sites and drug dispersions were evaluated under a direct visual guidance, suggesting that ultrasonography is a useful method for establishing evidence for determining correct insertion of IM injection, diffusion of medications, and the effective administration of IM injections

30. Dynamic Response of Local Layer and Molecular Orientation in Smectic Liquid Crystals by Time Resolved X-ray Micro-Diffraction(poster presentation,Soft Matter as Structured Materials)

この論文は国立情報学研究所の電子図書館事業により電子化されました。キラル分子からなるスメクティツク液晶のSmA相では、電場によって配向ベクトルの傾き角が誘起される電報効果が観察される。電傾効果における局所層構造としてこれまで水平シェブロンを基本構造とするモデルが提案されてきたが、放射光時分割マイクロビームX線回折法により、垂直シェブロンと水平シェブロンが空間的に交互に現れるストライプ構造であることが分かった。また分子配向の変化をハローパターンから直接的に求め、層構造と分子配向の関係を明らかにした

Hole Doping Effects on Physical Properties of the Layered Antiferromagnetic Insulator (LaO)MnPn (Pn=P, As, Sb)

AbstractWe have investigated an insulating origin of the layered Mn oxypnictide (LaO)MnPn with half-filled Mn 3d bands by choosing pnictogen atoms from P to Sb and introduction of hole carriers. Metallic states are found in (LaO)MnAs and (LaO)MnSb at higher hole doping

Carbon Ion Therapy for Ocular Melanoma: Development of Dedicated Nozzles for Orthogonal Two-port Treatment

[Purpose] To realize the orthogonal two-port treatment to ocular melanoma using carbon-ion beam, we developed detachable dedicated nozzles on vertical and horizontal beam snout. [Methods] HIMAC doesn’t have the exclusive treatment room for eye irradiation because the number of patients with ocular melanoma is a very few for Japanese and HIMAC is only one facility to treat the ocular melanoma by particle beam in Japan, e.g. 10-15 patients/year in HIMAC. The patient is set on the treatment couch at spine position that is same position at CT scanning for treatment planning. The details of treatment planning are reported separately in this meeting. Nozzles for eye-irradiation are attached to the forefront of fixed vertical and horizontal beam snouts that are routinely used for general clinical purpose of carbon-ion radiotherapy. Nozzles were designed to be easy to detach with high reproducibility. A pair of patient collimator and compensator is set on the nozzle. When we take the x-ray image at BEV for patient positioning, the part of the nozzle is shifted aside to keep a large x-ray field. Setting conditions of these devices are checked automatically, and linked to the beam-interlock system. [Results] Weights of vertical and horizontal nozzle were 12.0kg and 16.0kg, respectively. It is easy to detach the nozzle on the fixed beam snout, and the reproducibility of setting position by repeated detaches was less than +- 0.2mm. Nozzle position is possible to verify at each irradiation by the flat-panel x-ray image of hair cross-wire inside the nozzle. [Conclusions] Since April 2001, we have started the carbon-ion therapy for ocular melanoma at single port with 140MeV/u. At October 2005 we developed the lateral nozzle for carbon-170Mev/u, and begun the orthogonal two-port treatment to ocular melanoma. Over 60 patients with eye melanoma had already been treated successfully, and 7 patients were treated with the orthogonal two-field.PTCOG4

Effect of electric field concentration using nanopeak structures on the current–voltage characteristics of resistive switching memory

An attempt to reduce the SET voltage and RESET current of resistive switching (RS) memory was made using a geometric array of nanopeak (NP) structures. Bottoms of anodic porous alumina were used to form the NP structures that act as guides for the formation of conductive filaments that effectively concentrate the electric field. Samples were fabricated with flat surfaces (FS) and with two types of NP structure with different NP pitch. The NP samples provided SET voltages less than 2 V with narrow distributions and the RESET current was lower than that with the FS sample

Charge density distribution of transparent p-type semiconductor (LaO)CuS

The charge density distributions of layered oxysulfide (LaO)CuS, known as a p-type transparent semiconductor, have been investigated by analyzing the synchrotron radiation powder diffraction profile with the maximum entropy method/Rietveld method. The bonding character of the Cu–S bond is revealed to be covalent. Meanwhile, the O–La bonding has both ionic and covalent characters. The number of electrons estimated by integrating the charge density around each atom gave direct evidence that each CuS and LaO layer is electrically almost neutral

One-pot synthesis of monodisperse CoFe2O4@Ag core-shell nanoparticles and their characterization

Abstract In recent years, monodispersed magnetic nanoparticles with a core/shell structure are expected for their wide applications including magnetic fluid, recoverable catalysts, and biological analysis. However, their synthesis method needs numerous processes such as solvent substitution, exchange of protective agents, and centrifugation. A simple and rapid method for the synthesis of monodispersed core-shell nanoparticles makes it possible to accelerate their further applications. This paper describes a simple and rapid one-pot synthesis of core (CoFe2O4)-shell (Ag) nanoparticles with high monodispersity. The synthesized nanoparticles showed plasmonic light absorption owing to the Ag shell. Moreover, the magnetic property of the nanoparticles had a soft magnetic behavior at room temperature and a hard magnetic behavior at 5 K. In addition, the nanoparticles showed high monodispersity with a low polydispersity index (PDI) value of 0.083 in hexane