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A new class of natural magnetic materials - The ordering alloysIt is shown that tetrataenite (approximately FeNi), found in many meteorites, and Josephinite (approximately FeNi3), found in many serpentinized peridotites and possibly in Allende, are atomically ordered alloys. Data are presented, showing magnetic hysteresis loops, coercivity-temperature behavior at cryogenic temperatures, and thermomagnetic curves, that show that these ordered magnetic materials have unique magnetic properties and do not fit the conventional rock magnetism paradigms represented by Fe3O4 serpentinites. The ordered state is characterized by induced magnetic anisotropy, reaching the extreme for the tetragonal truly uniaxial anisotropy in FeNi. It is suggested that these ordered magnetic alloys should be considered a new class of natural magnetic materials.
Document ID
19880050795
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Wasilewski, Peter
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 13, 2013
Publication Date
May 1, 1988
Publication Information
Publication: Geophysical Research Letters
Volume: 15
ISSN: 0094-8276
Subject Category
Lunar And Planetary Exploration
Accession Number
88A38022
Distribution Limits
Public
Copyright
Other

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