000078858 001__ 78858
000078858 005__ 20200707115303.0
000078858 0247_ $$2doi$$a10.1103/PhysRevB.99.054419
000078858 0248_ $$2sideral$$a111231
000078858 037__ $$aART-2019-111231
000078858 041__ $$aeng
000078858 100__ $$0(orcid)0000-0002-5331-9758$$aMarcano, N.$$uUniversidad de Zaragoza
000078858 245__ $$aCluster-glass dynamics of the Griffiths phase in Tb5-xLaxSi2Ge2
000078858 260__ $$c2019
000078858 5060_ $$aAccess copy available to the general public$$fUnrestricted
000078858 5203_ $$aThe static magnetization and dynamic susceptibility responses of the cluster system within a Griffiths phase of the magnetocaloric compound Tb5-xLaxSi2Ge2 (x=0.075) have been investigated. A novel cluster-glass state within the Griffiths phase is formed at a characteristic freezing temperature where short-range ferromagnetic correlations set in the paramagnetic regime. Ferromagneticlike correlations are built up at around 155 K, which suddenly become frozen at a lower temperature ~140K, thus in analogy with a reentrant spin glass behavior. The ac susceptibility near the freezing temperature follows a critical slowing down process characterized by t0=10-13s and dynamic exponents z¿~6 and ß~0.4, similar to well-known spin glass systems. The nonlinear ac susceptibility analysis shows clearly the existence of a transition associated to the reentrant behavior. The origin of the intermediate cluster-glass phase inside the Griffiths phase is proposed to be the result of a combination of short-ranged RKKY intralayer positive exchange interactions between rare-earth Tb3+ ions and antiferromagnetic exchange between adjacent interlayers involving Si and Ge atoms in connection to the Tb3+ atoms.
000078858 536__ $$9info:eu-repo/grantAgreement/ES/DGA/E26$$9info:eu-repo/grantAgreement/ES/MCIU/MAT2017-83631-C3-R$$9info:eu-repo/grantAgreement/ES/MINECO/MAT2017-82970-C2-2-R
000078858 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc$$uhttp://creativecommons.org/licenses/by-nc/3.0/es/
000078858 592__ $$a1.811$$b2019
000078858 593__ $$aElectronic, Optical and Magnetic Materials$$c2019$$dQ1
000078858 593__ $$aCondensed Matter Physics$$c2019$$dQ1
000078858 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000078858 700__ $$0(orcid)0000-0002-4698-3378$$aAlgarabel, P.A.$$uUniversidad de Zaragoza
000078858 700__ $$aBarquín, L.F.
000078858 700__ $$aAraujo, J.P.
000078858 700__ $$aPereira, A.M.
000078858 700__ $$aBelo, J.H.
000078858 700__ $$0(orcid)0000-0002-6761-6171$$aMagén, C.$$uUniversidad de Zaragoza
000078858 700__ $$0(orcid)0000-0003-3724-508X$$aMorellón, L.$$uUniversidad de Zaragoza
000078858 700__ $$0(orcid)0000-0003-0681-8260$$aIbarra, M.R.$$uUniversidad de Zaragoza
000078858 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDpto. Física Materia Condensa.$$cÁrea Física Materia Condensada
000078858 773__ $$g99, 5 (2019), 054419 [10 pp]$$pPhys. Rev. B$$tPHYSICAL REVIEW B$$x2469-9950
000078858 8564_ $$s1175961$$uhttps://zaguan.unizar.es/record/78858/files/texto_completo.pdf$$yVersión publicada
000078858 8564_ $$s30391$$uhttps://zaguan.unizar.es/record/78858/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000078858 909CO $$ooai:zaguan.unizar.es:78858$$particulos$$pdriver
000078858 951__ $$a2020-07-07-11:49:53
000078858 980__ $$aARTICLE