ArticlesMagnetic and Electrical Properties

Magnetic Properties of Lunar Dust and Rock Samples

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Science  30 Jan 1970:
Vol. 167, Issue 3918, pp. 693-695
DOI: 10.1126/science.167.3918.693


Determinations on 20-to 80-milligram portions of the rock samples and the -150 mesh fraction of the lunar dust show pronounced Curie points between 680° and 780°C. Remanent intensities of five rock fragments vary from 8.4 x 10-5 to 0.30 X J0-5 emu/gram. Upon demagnetization, two of the samples had only viscous magnetization and two other samples had stable magnetizations with remanent coercivities in excess of 50 oersteds. Partial thermal demagnetization suggests that these apparently stable moments may have been acquired in a magnetic field in excess of 1500 gammas. xsxs