Benchtop time-resolved magneto-optical Kerr magnetometer.
Benchtop time-resolved magneto-optical Kerr magnetometer.
复制标题
台式时间分辨磁光克尔磁力计。
DOI：
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发表时间：
2008
影响因子：
1.6
通讯作者：
S. Meguro
中科院分区：
文献类型：
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作者：
A. Barman;T. Kimura;Y. Otani;Y. Fukuma;K. Akahane;S. Meguro
我们在这里提出了一个紧凑的台式时间分辨克尔磁强计的结构和应用，以测量磁性薄膜和光刻图案元件的磁化进动。与非常昂贵的飞秒激光器不同，该系统是建立在皮秒脉冲注入二极管激光器和电子脉冲和延迟发生器上的。进动是由长度和形状可控的电子脉冲触发的，电子脉冲通过微带线发射到样品上。我们使用与电子脉冲同步的偏振光脉冲来测量磁光克尔旋转。该系统集成在传统的直立显微镜配置中，具有单独的照明、成像和磁光探针路径。该系统提供高稳定性，相对容易对准，样品改变，和长时间延迟范围。我们演示了使用该系统测量坡莫合金微丝和微点的时间分辨动力学，它显示了两个不同时间尺度下的动力学。
We present here the construction and application of a compact benchtop time-resolved Kerr magnetometer to measure the magnetization precession in magnetic thin films and lithographically patterned elements. As opposed to very expensive femtosecond lasers this system is built upon a picosecond pulsed injection diode laser and electronic pulse and delay generators. The precession is triggered by the electronic pulses of controlled duration and shape, which is launched onto the sample by a microstrip line. We used polarized optical pulses synchronous to the electronic pulses to measure the magneto-optical Kerr rotation. The system is integrated in a conventional upright microscope configuration with separate illumination, imaging, and magneto-optical probe paths. The system offers high stability, relative ease of alignment, sample changing, and a long range of time delay. We demonstrate the measurements of time-resolved dynamics of a Permalloy microwire and microdot using this system, which showed dynamics at two different time scales.