000099428 001__ 99428
000099428 005__ 20210302100601.0
000099428 0247_ $$2doi$$a10.1103/PhysRevB.93.205108
000099428 0248_ $$2sideral$$a122231
000099428 037__ $$aART-2016-122231
000099428 041__ $$aeng
000099428 100__ $$aLafuerza, S.
000099428 245__ $$aHigh-resolution Mn K-edge x-ray emission and absorption spectroscopy study of the electronic and local structure of the three different phases in Nd0.5Sr0.5MnO3
000099428 260__ $$c2016
000099428 5060_ $$aAccess copy available to the general public$$fUnrestricted
000099428 5203_ $$aNd0.5Sr0.5MnO3 is particularly representative of mixed-valent manganites since their three characteristic macroscopic phases (charge-ordered insulator, ferromagnetic-metallic, and paramagnetic insulator) appear at different temperatures.We here report a complete x-ray emission and absorption spectroscopy (XES-XAS) study of Nd0.5Sr0.5MnO3 as a function of temperature to investigate the electronic and local structure changes of the Mn atom in these three phases. Compared with the differences in the XES-XAS spectra between Nd0.5Sr0.5MnO3 and the single-valent reference compounds NdMnO3 (Mn3+) and Sr/CaMnO3 (Mn4+), only modest changes have been obtained across the magnetoelectrical transitions. The XES spectra, including both the Mn Kα and Kβ emission lines, have mainly shown a subtle decrease in the local spin density accompanying the passage to the ferromagnetic-metallic phase. For the same phase, the small intensity variations in the pre-edge region of the high-resolution XAS spectra reflect an increase of the p-d mixing. The analysis of these XAS spectra imply a charge segregation between the two different Mn sites far from one electron, being in intermediate valences Mn+3.5±δ/2(δ < 0.2 e−) for all the phases. Our results indicate that the spin, charge, and geometrical structure of the Mn atom hardly change among the three macroscopic phases demonstrating the strong competition between the ferromagnetic conductor and the charge-0rdered insulator behaviors in the manganites.
000099428 536__ $$9info:eu-repo/grantAgreement/ES/DGA/E69-CAMRADS$$9info:eu-repo/grantAgreement/ES/MINECO/MAT2015-68760-C2-1
000099428 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
000099428 590__ $$a3.836$$b2016
000099428 591__ $$aPHYSICS, CONDENSED MATTER$$b18 / 67 = 0.269$$c2016$$dQ2$$eT1
000099428 592__ $$a2.339$$b2016
000099428 593__ $$aElectronic, Optical and Magnetic Materials$$c2016$$dQ1
000099428 593__ $$aCondensed Matter Physics$$c2016$$dQ1
000099428 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000099428 700__ $$aGarcía, J.
000099428 700__ $$0(orcid)0000-0002-9029-1977$$aSubías, G.$$uUniversidad de Zaragoza
000099428 700__ $$0(orcid)0000-0002-9706-3272$$aBlasco, J.$$uUniversidad de Zaragoza
000099428 700__ $$aGlatzel, P.
000099428 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDpto. Física Materia Condensa.$$cÁrea Física Materia Condensada
000099428 773__ $$g93 (2016), 205108 [11 pp.]$$pPhys. Rev. B, Condens. matter mater. phys.$$tPhysical Review B$$x1098-0121
000099428 8564_ $$s1366217$$uhttps://zaguan.unizar.es/record/99428/files/texto_completo.pdf$$yVersión publicada
000099428 8564_ $$s3409253$$uhttps://zaguan.unizar.es/record/99428/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000099428 909CO $$ooai:zaguan.unizar.es:99428$$particulos$$pdriver
000099428 951__ $$a2021-03-02-07:50:01
000099428 980__ $$aARTICLE