Encyclopedia of Geomagnetism and Paleomagnetism

2007 Edition
| Editors: David Gubbins, Emilio Herrero-Bervera

Variable Field Translation Balance

  • David Krása
  • Klaus Petersen
  • Nikolai Petersen
Reference work entry
DOI: https://doi.org/10.1007/978-1-4020-4423-6_312

The variable field translation balance (VFTB) is an instrument for measuring isothermal magnetizations in variable fields (e.g., hysteresis loops) as well as the temperature dependence of the associated magnetic parameters. It is specifically designed to measure the weak magnetizations commonly encountered in rock magnetism.

Measurement principles and main instrument components

The VFTB is a modification of the horizontal magnetic translation balance (e.g., Collinson, 1983). In contrast to the normal horizontal translation balance, the magnetic gradient in the VFTB is not produced by a special shape of the pole pieces of the electromagnet, but by a separate set of four gradient coils (AC; Figure V1). This separation of inducing field and gradient field was for the first time proposed by McKeehan ( 1934). The gradient field of the VFTB is not kept constant, but is oscillating with a certain frequency (2–4 Hz). The VFTB can thus be considered a one‐dimensional harmonic oscillator with...
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Bibliography

  1. Collinson, D.W., 1983. Methods in Rock Magnetism and Palaeomagnetism: Techniques and Instrumentation. New York: Chapman & Hall.Google Scholar
  2. McKeehan, L., 1934. Pendulum magnetometer for crystal ferromagnetism. The Review of Scientific Instruments, 5: 265–268.CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • David Krása
  • Klaus Petersen
  • Nikolai Petersen

There are no affiliations available