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arXiv 1505.04580cond-mat.mes-hall
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图案化铁磁金属氧化物半导体薄膜中与磁态相关的瞬态横向光伏效应

Magnetic state dependent transient lateral photovoltaic effect in patterned ferromagnetic metal-oxide-semiconductor films

Isidoro Martinez, Juan Pedro Cascales, Antonio Lara, Pablo Andres, Farkhad G. Aliev

摘要:

我们研究了外部磁场对生长在自然钝化p型Si(100)上的几微米宽的光刻图案化Co线的瞬态横向光伏效应(T-LPE)的大小和退相的影响。的T-LPE峰到峰的幅度和移相,通过锁定或通过激光关指数弛豫的特征时间测量,表现出显着的铁磁覆盖层的磁化方向的影响。我们的实验和数值模拟表明,T-LPE的大小是由Co各向异性磁阻。另一方面,退相的磁场依赖性可以用洛伦兹力对Co磁化强度和光生载流子漂移方向的间接影响来描述。我们的研究结果可以刺激快速位置敏感探测器的发展与磁调谐的幅度和相位响应。

英文摘要:

We investigate the influence of an external magnetic field on the magnitude and dephasing of the transient lateral photovoltaic effect (T-LPE) in lithographically patterned Co lines of widths of a few microns grown over naturally passivated p-type Si(100). The T-LPE peak-to-peak magnitude and dephasing, measured by lock-in or through the characteristic time of laser OFF exponential relaxation, exhibit a notable influence of the magnetization direction of the ferromagnetic overlayer. We show experimentally and by numerical simulations that the T-LPE magnitude is determined by the Co anisotropic magnetoresistance. On the other hand, the magnetic field dependence of the dephasing could be described by the influence of the Lorentz force acting perpendiculary to both the Co magnetization and the photocarrier drift directions. Our findings could stimulate the development of fast position sensitive detectors with magnetically tuned magnitude and phase responses.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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