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題名: Magnetothermopower and Magnetoresistivity of RuSr2Gd2-xCexCu2O10+δ (x=0.6,1.0)
作者: Liu, Chia-Jyi;Nayak, Pradipta K.;Willaims, G. V. M.
貢獻者: 物理學系
日期: 2007
上傳時間: 2012-09-10T06:14:58Z
出版者: American Institute of Physics
摘要: We report measurements of magnetothermopower and magnetoresistivity as a function of temperature on RuSr2Gd2−xCexCu2O10+δ (x = 0.6,1). In a magnetic field of 5 T, the size of thermopower decreases significantly, whereas the normal-state resistivity decreases slightly, which behaves similarly to RuSr2Gd1−xLaxCu2O8 (x = 0,0.1). A significant decrease of thermopower for both samples could be attributed to the decrease of the spin entropy contribution associated with the carriers in the RuO2 layers, as the Ru moments are aligned with the magnetic field. It is also found that the nonmetallic temperature dependence at low T follows a variable range hopping process for both samples.
關聯: Appl. Phys. Lett., 91(12): 123110
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