1.

論文(リポジトリ)

論文(リポジトリ)
仲間, 隆男 ; 辺土, 正人 ; 玉城, 純孝 ; Resel, R. ; Burkov, A.T. ; 矢ヶ崎克馬 ; Nakama, Takao ; Hedo, Masato ; Tamashiro, Junko ; Resel, Roland ; Burkov, Alexander T. ; Yagasaki, Katusma
出版情報: 琉球大学理学部紀要 = Bulletin of the College of Science. University of the Ryukyus.  pp.21-38,  1998-09.  琉球大学理学部
URL: http://hdl.handle.net/20.500.12000/9287
概要: We describe the system for thermopower measurement in magnetic fields up to 17 T in the temperature range from 3 K to 300 K. A special heating technique named "Seesaw heating method", a method similar to ac method, was developed and resulted in good thermal stability and high accuracy. Finding an empirical formula for all the calibration curves of chromel wire utilized as reference material enables us to measure thermopower at any field and at any temperature. The experimental results on GdAl_2 have been successfully analyzed on the basis of Mott's 2-band model with polalized conduction bands using linearized Boltzmann equation. 続きを見る
2.

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