ALTERNATING GRADIENT FORCE MAGNETOMETRY - APPLICATIONS AND EXTENSION TO LOW-TEMPERATURES

被引:17
作者
OGRADY, K
LEWIS, VG
DICKSON, DPE
机构
[1] School of Electronic Engineering Science, University of Wales, Bangor
关键词
D O I
10.1063/1.353613
中图分类号
O59 [应用物理学];
学科分类号
摘要
This paper describes the results of a study undertaken to determine the sensitivity and reproducibility of a commercially produced alternating gradient force magnetometer. A noise base of 2 X 10(-8) emu is achievable with an averaging time of 1 s. Reproducibility was found to be within 6% for most samples, but increases to 20% with low moment samples. The effect of the alternating field gradient on magnetic measurements has been fully investigated. The alternating field gradient is found to have significant effects on samples with a low fluctuation field and low coercivity. A low temperature system (4-300 K) is described and modifications to improve the sensitivity and base temperature are discussed.
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页码:5608 / 5613
页数:6
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