Enhanced alignment of Mn12-acetate micro-crystals

A dilute Mn12-acetate suspension composed of microscopic single crystals and single molecules in isopropanol was used for magnetic studies of Mn12-acetate single molecule magnets. We observed magnetic properties of the frozen Mn12-acetate suspension similar to large single crystals, specifically sev...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2007-05, Vol.312 (1), p.205-209
Main Authors: SEO, D, TEIZER, W, ZHAO, H, DUNBAR, K. R
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties and materials
Molecular magnets
Physics
Studies of specific magnetic materials
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Summary:A dilute Mn12-acetate suspension composed of microscopic single crystals and single molecules in isopropanol was used for magnetic studies of Mn12-acetate single molecule magnets. We observed magnetic properties of the frozen Mn12-acetate suspension similar to large single crystals, specifically several sharp steps in the low-temperature hysteresis loop, indicating significantly enhanced alignment as compared to prior studies of micro-crystals. The greater the external magnetic field during alignment, the sharper the steps were in the low-temperature hysteresis loops, indicating that this method can be used for continuous control of alignment. A magnetic field of 0.5T was sufficient to align the micro-crystals in the organic solvent to a degree previously observed only in much larger single crystals.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2006.09.034