1.

論文(リポジトリ)

論文(リポジトリ)
仲村, 大 ; 辺土, 正人 ; 高江洲, 義尚 ; 内間, 清晴 ; 矢ヶ崎, 克馬 ; 仲間, 隆男 ; 藤原, 哲也 ; 繁岡, 透 ; Nakamura, Dai ; Hedo, Masato ; Takaesu, Yoshinao ; Uchima, Kiyoharu ; Yagasaki, Katsuma ; Nakama, Takao ; Fujiwara, Tetsuya ; Shigeoka, Toru
出版情報: 琉球大学理学部紀要 = Bulletin of the College of Science. University of the Ryukyus.  pp.1-8,  2011-03.  琉球大学理学部
URL: http://hdl.handle.net/20.500.12000/21887
概要: We have developed a set-up with modified "seesaw heating method" for the simultaneous measurement of thermopow er S and electrical resistivity р under hydrostatic pressures P up to 3 GPa at the temperature range between 1.5 K and 300 K. By using this set-up, S and р of single crystalline YbMn_2Ge_2 and EuCo_2P_2 under high pressure were measured with enough accuracy. The temperature dependences of S and р show drastic changes at the critical pressure P_c in both compounds. The measurement results indicate that the simultaneous measurement of S and р is a usuful tool to study the pressure-induced phase transitions. 続きを見る
2.

論文(リポジトリ)

論文(リポジトリ)
高江洲, 義尚 ; 仲間, 隆男 ; 辺土, 正人 ; 内間, 清晴 ; 矢ヶ崎, 克馬 ; A. T. Burkov ; Takaesu, Yoshinao ; Nakama, Takao ; Hedo, Masato ; Uchima, Kiyoharu ; Yagasaki, Katsuma
出版情報: 琉球大学理学部紀要 = Bulletin of the College of Science. University of the Ryukyus.  pp.1-6,  2011-09.  琉球大学理学部
URL: http://hdl.handle.net/20.500.12000/22107
概要: Electrical resistivity p and thermopower S of Y_<1-x>R_xCo_2 (R=Gd, Tb, Dy, Ho and Er) Laves phase systems were measured at temperatures from 1.5 K to 300 K in magnetic fields up to 15 T and under hydrostatic pressures up to 2 GPa. The universal linear relation between the pressure and magnetic field derivatives of the resistivity, dp/dP vs. dp/dB, was observed in the Y_<1-x>R_xCo_2 systems. Similar scaling behavior was found for the thermopower dependence on pressure and magnetic field. 続きを見る
3.

図書

図書
Kiyoharu Uchima
出版情報: [Nishihara, Okinawa] : Graduate School of Engineering and Science, University of the Ryukyus, 2005
所蔵情報: loading…
4.

論文(リポジトリ)

論文(リポジトリ)
仲間, 隆男 ; 大吉, 隆文 ; 辺士, 正人 ; 玉城, 純孝 ; 内間, 清晴 ; Burkov, A.T. ; 矢ヶ崎, 克馬 ; Nakama, Takao ; Oyoshi, Takafumi ; Hedo, Masato ; Tamashiro, Junko ; Uchima, Kiyoharu ; Burkov, Alxander T. ; Yagasaki, Katsuma
出版情報: 琉球大学理学部紀要 = Bulletin of the College of Science. University of the Ryukyus.  pp.11-20,  1998-09.  琉球大学理学部
URL: http://hdl.handle.net/20.500.12000/9288
概要: The experimental set-up for simultaneous measurements of electrical resistivity and thermopower in the temperature range between room temperature and 1300 K was developed. The mechanical contacts of thermocouples, current leads and potential probes with sample were Utilized make it possible to measure a large variety of materials and result in a flexibility with respect to the sample form and dimension. The resistivity and thermopower of pure Ni, CeB_6 heavy fermion compound and a Cr-Si thin film composite are presented as test material to demonstrate the possibilities and accuracy of our experimental set-up. 続きを見る