Abstract

A Princeton Applied Research model FM-1 vibrating sample magnetometer (VSM) has been modified using lock-in detection, automatic data acquisition, and microcomputer control. The practical sensitivity in the updated version has been improved to 10−4 emu. Data collection and data management are quicker and greatly simplified. Through menu driven software and modular design, the overall ease of use has been enhanced. The original layout of the FM-1 has been retained so that no versatility is lost for either the original or modified version.

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