Magnetization relaxation in the single molecule magnet Ni$_4$ under continuous microwave irradiation

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dc.creatorde Loubens, G.
dc.creatorGaranin, D. A.
dc.creatorBeedle, C. C.
dc.creatorHendrickson, D. N.
dc.creatorKent, A. D.
dc.date2008-04-22
dc.date2008-07-22
dc.date.accessioned2026-07-07T09:51:39Z
dc.date.available2026-07-07T09:51:39Z
dc.descriptionSpin relaxation between the two lowest-lying spin-states has been studied in the S=4 single molecule magnet Ni$_4$ under steady state conditions of low amplitude and continuous microwave irradiation. The relaxation rate was determined as a function of temperature at two frequencies, 10 and 27.8 GHz, by simultaneously measuring the magnetization and the absorbed microwave power. A strong temperature dependence is observed below 1.5 K, which is not consistent with a direct single-spin-phonon relaxation process. The data instead suggest that the spin relaxation is dominated by a phonon bottleneck at low temperatures and occurs by an Orbach mechanism involving excited spin-levels at higher temperatures. Experimental results are compared with detailed calculations of the relaxation rate using the universal density matrix equation.
dc.description6 pages, 4 figures, submitted to Europhys. Lett
dc.identifierhttps://arxiv.org/abs/0804.3444
dc.identifierhttp://arxiv.org/abs/0804.3444
dc.identifierEurophys. Lett., 83, 37006 (2008)
dc.identifierdoi:10.1209/0295-5075/83/37006
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/165322
dc.subjectMesoscale and Nanoscale Physics
dc.subjectOther Condensed Matter
dc.titleMagnetization relaxation in the single molecule magnet Ni$_4$ under continuous microwave irradiation
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