000063276 001__ 63276
000063276 005__ 20240301150735.0
000063276 0247_ $$2doi$$a10.1038/ncomms5300
000063276 0248_ $$2sideral$$a86696
000063276 037__ $$aART-2014-86696
000063276 041__ $$aeng
000063276 100__ $$aGómez-Coca, S.
000063276 245__ $$aOrigin of slow magnetic relaxation in Kramers ions with non-uniaxial anisotropy
000063276 260__ $$c2014
000063276 5060_ $$aAccess copy available to the general public$$fUnrestricted
000063276 5203_ $$aTransition metal ions with long-lived spin states represent minimum size magnetic bits. Magnetic memory has often been associated with the combination of high spin and strong uniaxial magnetic anisotropy. Yet, slow magnetic relaxation has also been observed in some Kramers ions with dominant easy-plane magnetic anisotropy, albeit only under an external magnetic field. Here we study the spin dynamics of cobalt(II) ions in a model molecular complex. We show, by means of quantitative first-principles calculations, that the slow relaxation in this and other similar systems is a general consequence of time-reversal symmetry that hinders direct spin–phonon processes regardless of the sign of the magnetic anisotropy. Its magnetic field dependence is a subtle manifestation of electronuclear spin entanglement, which opens relaxation channels that would otherwise be forbidden but, at the same time, masks the relaxation phenomenon at zero field. These results provide a promising strategy to synthesize atom-size magnetic memories.
000063276 536__ $$9info:eu-repo/grantAgreement/ES/DGA/E98-MOLCHIP$$9info:eu-repo/grantAgreement/ES/MINECO/CTQ2011-23862-C02-01$$9info:eu-repo/grantAgreement/ES/MINECO/MAT2011-23861$$9info:eu-repo/grantAgreement/ES/MINECO/MAT2012-38318-C03
000063276 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000063276 590__ $$a11.47$$b2014
000063276 591__ $$aMULTIDISCIPLINARY SCIENCES$$b3 / 57 = 0.053$$c2014$$dQ1$$eT1
000063276 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000063276 700__ $$0(orcid)0000-0002-8424-9780$$aUrtizberea, A.
000063276 700__ $$aCremades, E.
000063276 700__ $$0(orcid)0000-0003-3449-4929$$aAlonso, P. J.
000063276 700__ $$0(orcid)0000-0001-7289-5649$$aCamón, A.$$uUniversidad de Zaragoza
000063276 700__ $$aRuiz, E.
000063276 700__ $$0(orcid)0000-0001-6284-0521$$aLuis, F.$$uUniversidad de Zaragoza
000063276 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDpto. Física Materia Condensa.$$cÁrea Física Materia Condensada
000063276 773__ $$g5 (2014), 4300 [8 pp.]$$tNature communications$$x2041-1723
000063276 8564_ $$s634766$$uhttps://zaguan.unizar.es/record/63276/files/texto_completo.pdf$$yVersión publicada
000063276 8564_ $$s58012$$uhttps://zaguan.unizar.es/record/63276/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000063276 909CO $$ooai:zaguan.unizar.es:63276$$particulos$$pdriver
000063276 951__ $$a2024-03-01-15:05:41
000063276 980__ $$aARTICLE