The time dependent magnetization of fine-grained iron in lunar breccias |
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Authors: | Wulf Achim Gose JG Carnes |
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Institution: | Lunar Science Institute, 3303 Nasa Road 1, Houston, Texas 77058, USA;Lockheed Electronics Company, Houston, Texas 77058, USA |
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Abstract: | Lunar breccias of low metamorphic grade offer a unique opportunity to investigate the magnetic properties of dispersed fine grained iron. These rocks exhibit a pronounced time dependent magnetization whose acquisition and decay are well explained by Ne´el's single domain theory. The effect is due to iron grains in the range of 120A?to 150A?in diameter which covers the transition from superparamagnetic to stable single domain behavior. |
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