An alternative approach to vector vibrating sample magnetometer detection coil setup
An alternative approach to vector vibrating sample magnetometer detection coil setup
复制标题
矢量振动样品磁力计检测线圈设置的替代方法
DOI：
10.1063/1.1149020
复制
发表时间：
1998
影响因子：
1.6
通讯作者：
J. Lodder
中科院分区：
文献类型：
--
作者：
E. Samwel;T. Bolhuis;J. Lodder
矢量振动样品磁强计（VSM）在用于测量薄膜样品时可能存在与角度相关校准和位置相关性有关的问题，所述薄膜样品具有与样品-线圈距离相当或大于样品-线圈距离的尺寸。这些问题是由于在常规VSM中，当执行角度相关测量时，样品相对于线圈旋转。在这篇文章中，提出了一种解决方案的基础上设置的VSM检测线圈，其位置是链接到的样品。与新设计的样品保持器一起，防止或减少了上述问题。矢量检测线圈系统在确定磁化矢量时显示出相对较小的误差（绝对值为±1%，角度为±0.6°）。此外，它具有相对较小的位置依赖性（每mm 1%），结合足够的灵敏度（10 s时间常数时为1nA m2或1 μemu）和使用高达10×10 mm 2样品的能力。 用于薄膜测量的改进的样品保持器减少了位置问题，同时减少了保持器的背景信号（至10 pAm 2/kA/m或7.958×10−10 emu/Oe）。
Vector vibrating sample magnetometers (VSMs) can present problems with respect to angular dependent calibration and positional dependency when they are used for measurements on thin film samples, which have dimensions comparable to or larger than the sample–coil distances. The problems are due to the fact that in conventional VSMs the sample is rotating with respect to the coils, when performing angular dependent measurements. In this article a solution is presented based on a setup of VSM detection coils, whose position is linked to that of the sample. Together with a newly designed sample holder, the above mentioned problems are prevented or reduced. The vector detection coil system shows a relatively small error in the determination of the magnetization vector (±1% in the absolute value and ±0.6° in the angle). Furthermore, it has a relatively small positional dependency (1% per mm) combined with a sufficient sensitivity (1 nA m2 or 1 μemu at 10 s time constant) and a capability of using samples up to 10×10 mm2. The improved sample holder for thin film measurements reduces positional problems while, at the same time, reducing the background signals of the holder (to 10 pA m2 per kA/m or 7.958×10−10 emu/Oe).