Absence of zero-field-cooled exchange bias effect in single crystalline La2−xAx CoMnO6 (A=Ca,Sr) compounds

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dc.creatorOliveira, Calazans Barbosa Marques Macchiutti de
dc.creatorJesus, Jonathas Rafael de 
dc.creatorCarneiro, F. B.
dc.creatorBufaiçal, Leandro Felix de Sousa
dc.creatorHatnean, Monica Ciomaga
dc.creatorBalakrishnan, Geetha
dc.creatorBittar, Eduardo Matzenbacher
dc.date.accessioned2024-02-20T14:56:22Z
dc.date.available2024-02-20T14:56:22Z
dc.date.issued2021
dc.description.abstractMagnetic properties of A2BB′O6 (A=rare or alkaline-earth ions; B,B′=transition−metal ions) double perovskites are of great interest due to their potential spintronic applications. Particularly fascinating is the zero-field-cooled exchange bias effect observed for the hole-doped La2−xAxCoMnO6 polycrystalline samples. In this paper we synthesize La2CoMnO6,La1.5Ca0.5CoMnO6, and La1.5Sr0.5CoMnO6 single crystals by the floating zone method and study their magnetic behavior. The three materials are ferromagnetic. Surprisingly, we observe no zero or even conventional exchange bias effect for the Ca- and Sr-doped single crystals, in sharp contrast to polycrystalline samples. This absence indicates that the lack of grain boundaries and spin-glass-like behavior, not observed in our samples, might be key ingredients for the spontaneous exchange bias phenomena seen in polycrystalline samples.
dc.identifier.citationMACCHIUTTI, C. et al. Absence of zero-field-cooled exchange bias effect in single crystalline La2−xAx CoMnO6 (A=Ca,Sr) compounds. Physical Review Materials, College Park, v. 5, n. 9, e094402, 2021. DOI: 10.1103/PhysRevMaterials.5.094402. Disponível em: https://journals.aps.org/prmaterials/abstract/10.1103/PhysRevMaterials.5.094402. Acesso em: 16 fev. 2024.
dc.identifier.doi10.1103/PhysRevMaterials.5.094402
dc.identifier.issne- 2475-9953
dc.identifier.urihttps://journals.aps.org/prmaterials/abstract/10.1103/PhysRevMaterials.5.094402
dc.language.isoeng
dc.publisher.countryEstados unidos
dc.publisher.departmentInstituto de Física - IF (RMG)
dc.rightsAcesso Restrito
dc.titleAbsence of zero-field-cooled exchange bias effect in single crystalline La2−xAx CoMnO6 (A=Ca,Sr) compounds
dc.typeArtigo

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