000063223 001__ 63223
000063223 005__ 20180723113747.0
000063223 0247_ $$2doi$$a10.1103/PhysRevB.96.024409
000063223 0248_ $$2sideral$$a100837
000063223 037__ $$aART-2017-100837
000063223 041__ $$aeng
000063223 100__ $$0(orcid)0000-0002-9706-3272$$aBlasco, J.$$uUniversidad de Zaragoza
000063223 245__ $$aMagnetic order and magnetoelectric properties of R2CoMn O6 perovskites (R=Ho, Tm, Yb, and Lu)
000063223 260__ $$c2017
000063223 5060_ $$aAccess copy available to the general public$$fUnrestricted
000063223 5203_ $$aWe present a detailed study on the magnetic structure and magnetoelectric properties of several double perovskites R2CoMnO6 (R=Ho, Tm, Yb, and Lu). All of these samples show an almost perfect (~94%) ordering of Co2+ and Mn4+ cations in the unit cell. Our research reveals that the magnetic ground state strongly depends on the R size. For samples with larger R (Ho and Tm), the ground state is formed by a ferromagnetic order (F type) of Co2+ and Mn4+ moments, while R either remains mainly disordered (Ho) or is coupled antiferromagnetically (Tm) to the Co/Mn sublattice. For samples with smaller R (Yb or Lu), competitive interactions lead to the formation of an E-type arrangement for the Co2+ and Mn4+ moments with a large amount of extended defects such as stacking faults. The Yb3+ is partly ordered at very low temperature. The latter samples undergo a metamagnetic transition from the E into the F type, which is coupled to a negative magnetodielectric effect. Actually, the real part of dielectric permittivity shows an anomaly at the magnetic transition for the samples exhibiting an E-type order. This anomaly is absent in samples with F-type order, and, accordingly, it vanishes coupled to the metamagnetic transition for R=Yb or Lu samples. 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, but the onset of pyroelectric current is neither correlated to the kind of magnetic ordering nor to the magnetic transition. Our study identified the pyroelectric current as thermally stimulated depolarization current and electric-field polarization curves show a linear behavior at low temperature. Therefore, no clear ferroelectric transition occurs in these compounds.
000063223 536__ $$9info:eu-repo/grantAgreement/ES/DGA/E69-CAMRADS$$9info:eu-repo/grantAgreement/ES/MINECO/MAT2015-68760-C2-1$$9info:eu-repo/grantAgreement/ES/MINECO/MAT2015-68760-C2-2
000063223 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc$$uhttp://creativecommons.org/licenses/by-nc/3.0/es/
000063223 590__ $$a3.813$$b2017
000063223 591__ $$aPHYSICS, CONDENSED MATTER$$b18 / 67 = 0.269$$c2017$$dQ2$$eT1
000063223 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000063223 700__ $$aGarcía-Muñoz, J.L.
000063223 700__ $$0(orcid)0000-0003-1199-2087$$aGarcía, J.
000063223 700__ $$0(orcid)0000-0002-9029-1977$$aSubías, G.$$uUniversidad de Zaragoza
000063223 700__ $$0(orcid)0000-0002-6425-024X$$aStankiewicz, J.$$uUniversidad de Zaragoza
000063223 700__ $$0(orcid)0000-0002-8505-5232$$aRodríguez-Velamazán, J.A.
000063223 700__ $$aRitter, C.
000063223 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDpto. Física Materia Condensa.$$cÁrea Física Materia Condensada
000063223 773__ $$g96, 2 (2017), 024409 [14 pp]$$pPhys. Rev. B$$tPhysical Review B$$x2469-9950
000063223 8564_ $$s4670483$$uhttps://zaguan.unizar.es/record/63223/files/texto_completo.pdf$$yVersión publicada
000063223 8564_ $$s128271$$uhttps://zaguan.unizar.es/record/63223/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000063223 909CO $$ooai:zaguan.unizar.es:63223$$particulos$$pdriver
000063223 951__ $$a2018-07-23-11:30:40
000063223 980__ $$aARTICLE