Reversal transient laser-induced voltages in La2/3Ca1/3MnO3 films

• 来源期刊: 中国物理（英文版）
• 关键词: manganite oxide thin film photovoltaic effect
• 年，卷（期）: 2007,（3）
• 页码范围: 840-842
• 页数: 3页
• 语种: 英文

摘要

This paper reports that the transient laser-induced voltages have been observed in La2/3Ca1/3MnO3 thin films on MgO (001) in the absence of an applied current.A peak voltage of～0.15V Was detected in response to 0.015 J pulse of 308 nm laser.It is demonstrated that the signal polarity is reversed when the films are irradiated through the substrate rather than at the air/film interface.Off-diagonal thermoelectricity may support the inversion of the signal when the irradiation direction is reversed.