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Direct imaging of nanoscale magnetic interactions in minerals.
- Source :
-
Proceedings of the National Academy of Sciences of the United States of America . 12/24/2002, Vol. 99 Issue 26, p16556. 6p. 13 Color Photographs, 5 Diagrams, 3 Graphs. - Publication Year :
- 2002
-
Abstract
- The magnetic microstructure of a natural, finely exsolved intergrowth of submicron magnetite blocks in an ulvöspinel matrix is characterized by using off-axis electron holography in the transmission electron microscope. Single-domain and vortex states in individual blocks, as well as magnetostatic interaction fields between them, are imaged at a spatial resolution approaching the nanometer scale. The images reveal an extremely complicated magnetic structure dominated by the shapes of the blocks and magnetostatic interactions. Magnetic superstates, in which clusters of magnetite blocks act collectively to form vortex and multidomain states that have zero net magnetization, are observed directly. [ABSTRACT FROM AUTHOR]
- Subjects :
- *MAGNETITE
*MAGNETIC structure
*MICROSTRUCTURE
*IMAGING systems
Subjects
Details
- Language :
- English
- ISSN :
- 00278424
- Volume :
- 99
- Issue :
- 26
- Database :
- Academic Search Index
- Journal :
- Proceedings of the National Academy of Sciences of the United States of America
- Publication Type :
- Academic Journal
- Accession number :
- 8921271
- Full Text :
- https://doi.org/10.1073/pnas.262514499