The effect of uniaxial pressure on the magnetic anisotropy of the Mn_{12}-Ac single-molecule magnet

We study the effect of uniaxial pressure on the magnetic hysteresis loops of the single-molecule magnet Mn_{12}-Ac. We find that the application of pressure along the easy axis increases the fields at which quantum tunneling of magnetization occurs. The observations are attributed to an increase in...

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Bibliographic Details
Published inarXiv.org
Main Authors Atkinson, J H, Park, K, Beedle, C C, Hendrickson, D N, Myasoedov, Y, Zeldov, E, Friedman, Jonathan R
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 17.05.2013
Subjects
Density functional theory
Hysteresis loops
Magnetic anisotropy
Magnetization reversal
Physics - Materials Science
Physics - Mesoscale and Nanoscale Physics
Pressure effects
Quantum tunnelling
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Summary:We study the effect of uniaxial pressure on the magnetic hysteresis loops of the single-molecule magnet Mn_{12}-Ac. We find that the application of pressure along the easy axis increases the fields at which quantum tunneling of magnetization occurs. The observations are attributed to an increase in the molecule's magnetic anisotropy constant D of 0.142(1)%/kbar. The increase in D produces a small, but measurable increase in the effective energy barrier for magnetization reversal. Density-functional theory calculations also predict an increase in the barrier with applied pressure.
ISSN:2331-8422
DOI:10.48550/arxiv.1302.2276