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摘要
We report four probe impedance (Z=R+iX) of La0.67Ba0.33MnO3 at f=100 kHz under different dc bias magnetic fields. The ac resistance (R) exhibits a peak around T-P=325 K which is accompanied by a rapid increase and a peak in the reactance (X) in a zero field. The magnetoreactance (Delta X/X) exhibits a sharp peak close to T-P and its magnitude (approximate to 60% in H=1 kG) exceeds that of the ac magnetoresistance (Delta R/R=5%). It is suggested that the magnetoreactance arises from changes in the self inductance of the sample rather than the capacitance.
- 出版日期2009-8-24
