000057089 001__ 57089
000057089 005__ 20231127095529.0
000057089 0247_ $$2doi$$a10.1103/PhysRevB.94.155117
000057089 0248_ $$2sideral$$a96632
000057089 037__ $$aART-2016-96632
000057089 041__ $$aeng
000057089 100__ $$aCuartero, V.
000057089 245__ $$aX-ray absorption and emission spectroscopy study of Mn and Co valence and spin states in TbM n1-x C ox O3
000057089 260__ $$c2016
000057089 5060_ $$aAccess copy available to the general public$$fUnrestricted
000057089 5203_ $$aThe valence and spin state evolution of Mn and Co on TbMn1-xCoxO3 series is precisely determined by means of soft and hard x-ray absorption spectroscopy (XAS) and Kß x-ray emission spectroscopy (XES). Our results show the change from Mn3+ to Mn4+ both high-spin (HS) together with the evolution from Co2+ HS to Co3+ low-spin (LS) with increasing x. In addition, high energy resolution XAS spectra on the K pre-edge region are interpreted in terms of the strong charge transfer and hybridization effects along the series. These results correlate well with the spin values of Mn and Co atoms obtained from the Kß XES data. In this paper, we determine that Co enters into the transition metal sublattice of TbMnO3 as a divalent ion in HS state, destabilizing the Mn long-range magnetic order since very low doping compositions (x=0.1). Samples in the intermediate composition range (0.4=x=0.6) adopt the crystal structure of a double perovskite with long-range ferromagnetic ordering which is due to Mn4+-O-Co2+ superexchange interactions with both cations in HS configuration. Ferromagnetism vanishes for x=0.7 due to the structural disorder that collapses the double perovskite structure. The spectroscopic techniques reveal the occurrence of Mn4+ HS and a fluctuating valence state Co2+ HS/Co3+ LS in this composition range. Disorder and competitive interactions lead to a magnetic glassy behavior in these samples.
000057089 536__ $$9info:eu-repo/grantAgreement/ES/DGA/E69$$9info:eu-repo/grantAgreement/ES/MINECO/MAT2015-68760-C2-1-P
000057089 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000057089 590__ $$a3.836$$b2016
000057089 591__ $$aPHYSICS, CONDENSED MATTER$$b18 / 67 = 0.269$$c2016$$dQ2$$eT1
000057089 592__ $$a2.339$$b2016
000057089 593__ $$aElectronic, Optical and Magnetic Materials$$c2016$$dQ1
000057089 593__ $$aCondensed Matter Physics$$c2016$$dQ1
000057089 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000057089 700__ $$aLafuerza, S.
000057089 700__ $$aRovezzi, M.
000057089 700__ $$aGarcía, J.
000057089 700__ $$0(orcid)0000-0002-9706-3272$$aBlasco, J.$$uUniversidad de Zaragoza
000057089 700__ $$0(orcid)0000-0002-9029-1977$$aSubías, G.$$uUniversidad de Zaragoza
000057089 700__ $$aJiménez, E.
000057089 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDpto. Física Materia Condensa.$$cÁrea Física Materia Condensada
000057089 773__ $$g94, 15 (2016), 155117 [10 pp]$$pPhys. Rev. B, Condens. matter mater. phys.$$tPhysical review. B, Condensed matter and materials physics$$x1098-0121
000057089 8564_ $$s855291$$uhttps://zaguan.unizar.es/record/57089/files/texto_completo.pdf$$yVersión publicada
000057089 8564_ $$s129769$$uhttps://zaguan.unizar.es/record/57089/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000057089 909CO $$ooai:zaguan.unizar.es:57089$$particulos$$pdriver
000057089 951__ $$a2023-11-27-09:46:12
000057089 980__ $$aARTICLE