Unconventional spin relaxation involving localized vibrational modes in Ho single-atom magnets

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F20%3A00533910" target="_blank" >RIV/68378271:_____/20:00533910 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1103/PhysRevLett.124.077204" target="_blank" >https://doi.org/10.1103/PhysRevLett.124.077204</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevLett.124.077204" target="_blank" >10.1103/PhysRevLett.124.077204</a>

Result language
angličtina
Original language name
Unconventional spin relaxation involving localized vibrational modes in Ho single-atom magnets
Original language description
We investigate the spin relaxation of Ho single atom magnets on MgO=Agð100Þ as a function of temperature and magnetic field. We find that the spin relaxation is thermally activated at low field, while it remains larger than 1000 s up to 30 K and 8 T. This behavior contrasts with that of single molecule magnets and bulk paramagnetic impurities, which relax faster at high field.Combining our results with density functional theory, we rationalize this unconventional behavior by showing that local vibrations activate a two phonon Raman process with a relaxation rate that peaks near zero field and is suppressed at high field. Our work shows the importance of these excitations in the relaxation of axially coordinated magnetic atoms.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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