Magnetothermopower and magnetoresistivity ofRuSr2Gd1−xLaxCu2O8(x=0,0.1)
Magnetothermopower and magnetoresistivity ofRuSr2Gd1−xLaxCu2O8(x=0,0.1)
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DOI：
10.1103/physrevb.71.014502
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发表时间：
2004-06
影响因子：
3.7
通讯作者：
C. Liu;C. Sheu;T.-W. Wu;L.-C. Huang;F. Hsu;H. D.Yang;G. Williams;C. C. Liu-C.
中科院分区：
文献类型：
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作者：
C. Liu;C. Sheu;T.-W. Wu;L.-C. Huang;F. Hsu;H. D.Yang;G. Williams;C. C. Liu-C.
我们测量了RuSr2Gd1-xLaxCu2O8(x=0，0.1)的磁热电势和磁阻随温度的变化。正常状态的热电势在施加5T的磁场后急剧下降，而电阻率在施加相同的磁场后变化不大。我们的结果表明，RuO2层是导电的，磁场引起的总热电势的降低是由于RuO2层中载流子的自旋熵降低导致的局部热电势降低所致。
We report measurements of magnetothermopower and magnetoresistivity as a function of temperature on RuSr2Gd1-xLaxCu2O8 (x = 0, 0.1). The normal-state thermopower shows a dramatic decrease after applying a magnetic field of 5 T, whereas the resistivity shows only a small change after applying the same field. Our results suggest that RuO2 layers are conducting and the magnetic field induced decrease of the overall thermopower is caused by the decrease of partial thermopower decrease associated with the spin entropy decrease of the carriers in the RuO2 layers.