巻号一覧
57 巻, 3 号
March
選択された号の論文の10件中1～10を表示しています
- |<
- <
- 1
- >
- >|
研究
研究
-
姜 賢求, 長田 稔子, 津守 不二夫, 三浦 秀士2010 年 57 巻 3 号 p. 147-151
発行日: 2010年
公開日: 2010/05/07
ジャーナル オープンアクセスThe effect of process parameters in direct metal laser sintering (DMLS) on the forming of density gradient porous structure was investigated. The melted and consolidated parts of metallic powders by laser irradiation (it is called as melted part in this paper) sparsely form along the laser scanning line. The size of melted part strongly depends on the laser input energy. During the direct metal laser sintering, the melted parts conglutinate with each other and made the larger melted part. It was connected to other melted parts in different way by strong laser power and high scan rate. Especially, in the case of same laser energy density, if the scan rate become faster, the connection between melted parts gets stronger and the high density is obtained. With laser sintering condition for similar relative density, the microstructure of material formed by higher scan rate shows more homogeneous microstructure than that of the others formed by slow scan rate.抄録全体を表示PDF形式でダウンロード (1682K) -
坂本 直道, 安野 拓也, 玄場 公規, 松宮 裕介, 林 正裕2010 年 57 巻 3 号 p. 152-157
発行日: 2010年
公開日: 2010/05/07
ジャーナル オープンアクセスRecycling possibilities of silicon grinding sludge using spark plasma sintering (SPS) method were investigated. The silicon grinding sludge taken out from wastewater in silicon wafer production process was sintered by the SPS method. Sintering experiment results showed that production of sintered compacts was possible from the silicon sludge by SPS. Density and hardness of sintered compacts were increased with both sintering temperature and holding time. Results of composition analyses indicated that the sintering increased silicon purity of the compacts due to decreasing oxygen content. The content of silicon in the sintered compact was increased up to about 20 mass% compared with that in the silicon sludge. XRD analysis suggested also decreasing oxygen content by the sintering. Therefore, it was revealed that higher-purity silicon sintered compacts were produced by sintering of the silicon sludge with the SPS method in our study.抄録全体を表示PDF形式でダウンロード (1210K)
特集：新しい電子物性を創成する遷移金属（希土類）化合物
総報
-
吉村 一良2010 年 57 巻 3 号 p. 160
発行日: 2010年
公開日: 2010/05/07
ジャーナル オープンアクセスPDF形式でダウンロード (172K)
解説
-
中村 裕之2010 年 57 巻 3 号 p. 161-165
発行日: 2010年
公開日: 2010/05/07
ジャーナル オープンアクセスThe effect of geometry, particularly, geometric frustration on electronic properties of itinerant electron magnets are discussed. As an example, the competition between intra- and inter-dimer interaction, and the characteristic lattice dynamics in Mo3Sb7 are briefly reviewed. A new possible and promising candidate of the metallic frustrated lattice, the stella quadrangula lattice, found in compounds with the η-carbide type structure, etc., is introduced.抄録全体を表示PDF形式でダウンロード (649K)
研究
-
Jinhu Yang, Mami Matsui, Hiroto Ohta, Chishiro Michioka, Kazuyoshi Yos ...2010 年 57 巻 3 号 p. 166-171
発行日: 2010年
公開日: 2010/05/07
ジャーナル オープンアクセスSingle crystals of Fe1-xCoxTe0.85 have been synthesized successfully with x = 0, 0.02, 0.03, 0.05 and 0.10. The cobalt can be substituted for the iron site as Fe1-xCoxTe0.85 up to a solubility limit of x = 0.10, above which an impurity phase was observed. We obtained the intrinsic susceptibilities of these samples by Honda-Owen plot. The antiferromagnetic transition temperature decreases from about 70 K (x = 0) to 34 K (x = 0.05) with increasing the Co substitution level. Superconductivity was not discovered in this series, but a spin-glass like behavior was observed in 5 % substituted sample.抄録全体を表示PDF形式でダウンロード (660K) -
陳 斌, 楊 金虎, 太田 寛人, 道岡 千城, 吉村 一良2010 年 57 巻 3 号 p. 172-176
発行日: 2010年
公開日: 2010/05/07
ジャーナル オープンアクセスFe3GeTe2 was synthesized by solid state reaction and chemical transport methods. Our magnetic measurements show that it is a ferromagnet with the Curie temperature of 226 K. The Rhodes-Wohlfarth ratio Pc/Ps∼6.6 indicates that it is an itinerant ferromagnet. On the other hand, we found the single crystal sample with the Curie temperature of 146 K shows the large anisotropy in the temperature dependence of magnetic susceptibilities and the magnetization curves when the external magnetic fields are applied along the c axis and within the ab plane.抄録全体を表示PDF形式でダウンロード (711K) -
太田 寛人, 陳 斌, 楊 金虎, 道岡 千城, 吉村 一良2010 年 57 巻 3 号 p. 177-180
発行日: 2010年
公開日: 2010/05/07
ジャーナル オープンアクセスWe successfully synthesized itinerant-electron ferromagnetic compound LaCoAsO and studied its magnetic properties based on the self-consistent renormalization theory of spin fluctuations and Takahashi's spin-fluctuation theory. We showed that the magnetization (M) of LaCoAsO shows the convex behavior when plotted in the form of M 2 vs H/M, while the M 4 shows the almost linear relation against H/M, which is predicted in the Takahashi's theory. From the comparison between the experimentally observed magnetic susceptibility and calculated one by using the self-consistent renormalization theory, we showed that the nature of spin fluctuations is 3-dimensional around the Curie temperature TC, while above 3TC the difference between two susceptibilities becomes more prominent with increasing temperature, indicating that 2-dimensional spin fluctuations dominate over the 3-dimensional ones in the high temperature region.抄録全体を表示PDF形式でダウンロード (506K) -
Cédric Tassel, Yoshihiro Tsujimoto, Hiroshi Kageyama, Kazuyoshi ...2010 年 57 巻 3 号 p. 181-185
発行日: 2010年
公開日: 2010/05/07
ジャーナル オープンアクセスBy using new synthetic approaches, one can create new families of materials which could lead to new chemical and physical properties. From this philosophy, we have synthesized novel iron oxides by topochemically extracting oxygen from well known perovskites derivatives SrFeO3, layered Sr3Fe2O7 and brownmillerite CaFeO2.5. The new materials SrFeO2, Sr3Fe2O5 and CaFeO2 possess FeO4 square planes and derivatives. These novel materials show new structures in which exotic electronic and magnetic properties can be witnessed. They also provide clues to understand oxygen diffusion in solids. In this review, we describe the chemical and physical properties of these novel iron oxides.抄録全体を表示PDF形式でダウンロード (952K)
本会記事
-
2010 年 57 巻 3 号 p. Pref3_1
発行日: 2010年
公開日: 2010/05/07
ジャーナル オープンアクセスPDF形式でダウンロード (152K) -
2010 年 57 巻 3 号 p. MtgPr3_1-MtgPr3_21
発行日: 2010年
公開日: 2010/05/07
ジャーナル オープンアクセスPDF形式でダウンロード (623K)
- |<
- <
- 1
- >
- >|