000056289 001__ 56289
000056289 005__ 20201113085626.0
000056289 0247_ $$2doi$$a10.1103/PhysRevB.93.214401
000056289 0248_ $$2sideral$$a95222
000056289 037__ $$aART-2016-95222
000056289 041__ $$aeng
000056289 100__ $$0(orcid)0000-0002-9706-3272$$aBlasco, J.$$uUniversidad de Zaragoza
000056289 245__ $$aMagnetoelectric and structural properties of Y2CoMn O6: The role of antisite defects
000056289 260__ $$c2016
000056289 5060_ $$aAccess copy available to the general public$$fUnrestricted
000056289 5203_ $$aWe have carried out an investigation on the magnetoelectric properties of the presumed multiferroic Y2CoMnO6 with different degrees of Co/Mn atomic ordering. The magnetic ground state was studied by neutron diffraction, showing a collinear ferromagnetic (FM) ordering of Co and Mn moments with a small antiferromagnetic canting. No superstructure peaks from an E-type magnetic structure were detected in our measurements. Magnetic measurements reveal FM transitions with pinned magnetic domains. The degree of Co/Mn ordering affects the Curie temperature only a little, but has strong effects on the magnetic hysteresis loops, and the FM moment signal at high field increases with increasing such order. The loops display steps at critical fields whose number and extent depends on each specimen. The most ordered sample exhibits the greatest steps ascribed to the alignment of magnetic domains separated by antiphase boundaries. All samples are insulators exhibiting low dielectric loss and dielectric constants at low temperature. On warming, they show a step increase in the real dielectric permittivity accompanied by peaks in the dielectric loss typical of thermally activated hopping processes. At room temperature, the huge values of the dielectric constant reveal the presence of Maxwell-Wagner depletion layers. Pyroelectric measurements reveal a high polarization at low temperature for these compounds that increases with increasing the Co/Mn ordering. There is no correlation between the magnetic transition and the onset of pyroelectric current. No significant changes are observed in the pyroelectric effect measured under an external magnetic field, so magnetoelectric coupling is negligible. This paper identifies the pyroelectric current as thermally stimulated depolarization current ascribed to the reorientation of defect dipoles with activation energy of about 0.05 eV. Therefore, no ferroelectric transition occurs in these compounds, discarding the existence of intrinsic magnetoelectric multiferroicity.
000056289 536__ $$9info:eu-repo/grantAgreement/ES/MINECO/MAT2012-38213-C02-01$$9info:eu-repo/grantAgreement/ES/MINECO/MAT2012-38213-C02-02$$9info:eu-repo/grantAgreement/ES/MINECO/MAT2015-68760-C1-1$$9info:eu-repo/grantAgreement/ES/MINECO/MAT2015-68760-C1-2-P
000056289 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
000056289 590__ $$a3.836$$b2016
000056289 591__ $$aPHYSICS, CONDENSED MATTER$$b18 / 67 = 0.269$$c2016$$dQ2$$eT1
000056289 592__ $$a2.339$$b2016
000056289 593__ $$aElectronic, Optical and Magnetic Materials$$c2016$$dQ1
000056289 593__ $$aCondensed Matter Physics$$c2016$$dQ1
000056289 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000056289 700__ $$aGarcía, J.
000056289 700__ $$0(orcid)0000-0002-9029-1977$$aSubías, G.$$uUniversidad de Zaragoza
000056289 700__ $$0(orcid)0000-0002-6425-024X$$aStankiewicz, J.$$uUniversidad de Zaragoza
000056289 700__ $$0(orcid)0000-0002-8505-5232$$aRodríguez-Velamazán, J.A.
000056289 700__ $$aRitter, C.
000056289 700__ $$aGarcía-Muñoz, J.L.
000056289 700__ $$aFauth, F.
000056289 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDpto. Física Materia Condensa.$$cÁrea Física Materia Condensada
000056289 773__ $$g93, 21 (2016), 214401 [12 pp]$$pPhys. Rev. B, Condens. matter mater. phys.$$tPhysical Review B$$x1098-0121
000056289 8564_ $$s3285553$$uhttps://zaguan.unizar.es/record/56289/files/texto_completo.pdf$$yVersión publicada
000056289 8564_ $$s128648$$uhttps://zaguan.unizar.es/record/56289/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000056289 909CO $$ooai:zaguan.unizar.es:56289$$particulos$$pdriver
000056289 951__ $$a2020-11-13-08:46:29
000056289 980__ $$aARTICLE