Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

The measurement of Curie-points with commercially available milli-oerstedmeters

The measurement of Curie-points with commercially available milli-oerstedmeters Appl. sci. Res. Section B, Vol. 11 LETTER TO THE EDITOR*) The measurement of Curie-points with commercially available milli-oerstedmeters. The determination of the Curie-temperature of magnetic materials has become an important research aid in such fields as metallurgy, geology and archaeology. The present note describes the simple apparatus which the authors have developed for such applications. It has the advantage that it can be assembled from commercially available components. The principle of the method is as follows: The sample is magnetised and then heated. The temperature where the remanent magnetisation disappears is taken to be the Curie-point of the sample. Remanent magnetisation can be detected with great sensitivity with a commercially available milli-oerstedmeter. However, it is found in practice that magnetic disturbances in the laboratory and noise in the electronics of the milli-oerstedmeter often make it difficult to make such measurements with any great accuracy, particularly if one deals with small samples. The effect of these disturbances upon the results of the measurements were elimi- nated by continuously rotating the sample, thus generating a periodically varying signal in the milli-oerstedmeter. This can easily be distinguished from the disturbances because the signal has a fixed frequency. The authors have found http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Scientific Research, Section B Springer Journals

The measurement of Curie-points with commercially available milli-oerstedmeters

Download PDF
2 pages

Loading next page...
 
/lp/springer-journals/the-measurement-of-curie-points-with-commercially-available-milli-wj0bHsG2ZW

References (1)

Publisher
Springer Journals
Copyright
Copyright © Martinus Nijhoff 1964
ISSN
0365-7140
DOI
10.1007/bf02922216
Publisher site
See Article on Publisher Site

Abstract

Appl. sci. Res. Section B, Vol. 11 LETTER TO THE EDITOR*) The measurement of Curie-points with commercially available milli-oerstedmeters. The determination of the Curie-temperature of magnetic materials has become an important research aid in such fields as metallurgy, geology and archaeology. The present note describes the simple apparatus which the authors have developed for such applications. It has the advantage that it can be assembled from commercially available components. The principle of the method is as follows: The sample is magnetised and then heated. The temperature where the remanent magnetisation disappears is taken to be the Curie-point of the sample. Remanent magnetisation can be detected with great sensitivity with a commercially available milli-oerstedmeter. However, it is found in practice that magnetic disturbances in the laboratory and noise in the electronics of the milli-oerstedmeter often make it difficult to make such measurements with any great accuracy, particularly if one deals with small samples. The effect of these disturbances upon the results of the measurements were elimi- nated by continuously rotating the sample, thus generating a periodically varying signal in the milli-oerstedmeter. This can easily be distinguished from the disturbances because the signal has a fixed frequency. The authors have found

Journal

Applied Scientific Research, Section B – Springer Journals

Published: Feb 1, 1964

Keywords: Radium; Remanent Magnetisation; Temperature Homogeneity; Simultaneous Recording; Good Temperature

There are no references for this article.