A Simple Alternating Current Magnetometer of the Automatic Balancing Type

Naoshi Ikeda; Kay Kohn

doi:10.1143/JJAP.29.208

A Simple Alternating Current Magnetometer of the Automatic Balancing Type

Naoshi Ikeda, Kay Kohn

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

An improvement of a Hartshorn type alternating current magnetometer is reported. The use of a dual channel oscillator, a two-phase lock-in amplifier and a personal computer enabled us to obtain a simple feedback system for automatic balancing of the bridge. The resolution of this system is about 3×10^-7emu of magnetic moment or higher at the field of 0.8 Oe in amplitude and 159 Hz in frequency.

Original language	English
Pages (from-to)	208-209
Number of pages	2
Journal	Japanese Journal of Applied Physics
Volume	29
Issue number	1 R
DOIs	https://doi.org/10.1143/JJAP.29.208
Publication status	Published - Jan 1990
Externally published	Yes

Keywords

Ac susceptibility
Hartshorn bridge
High temperature superconductor
Magnetization measurement
Magnetometer
Spin glass

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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10.1143/JJAP.29.208

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abstract = "An improvement of a Hartshorn type alternating current magnetometer is reported. The use of a dual channel oscillator, a two-phase lock-in amplifier and a personal computer enabled us to obtain a simple feedback system for automatic balancing of the bridge. The resolution of this system is about 3×10-7emu of magnetic moment or higher at the field of 0.8 Oe in amplitude and 159 Hz in frequency.",

keywords = "Ac susceptibility, Hartshorn bridge, High temperature superconductor, Magnetization measurement, Magnetometer, Spin glass",

author = "Naoshi Ikeda and Kay Kohn",

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AB - An improvement of a Hartshorn type alternating current magnetometer is reported. The use of a dual channel oscillator, a two-phase lock-in amplifier and a personal computer enabled us to obtain a simple feedback system for automatic balancing of the bridge. The resolution of this system is about 3×10-7emu of magnetic moment or higher at the field of 0.8 Oe in amplitude and 159 Hz in frequency.

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KW - High temperature superconductor

KW - Magnetization measurement

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KW - Spin glass

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