The spontaneous exchange bias effect in La2−𝑥Ca𝑥CoMnO6 series

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dc.creatorJesus, Jonathas Rafael de
dc.creatorBufaiçal, Leandro Felix de Sousa
dc.creatorBittar, Eduardo Matzenbacher
dc.date.accessioned2024-02-20T14:07:41Z
dc.date.available2024-02-20T14:07:41Z
dc.date.issued2022
dc.description.abstractStructural, electronic and magnetic properties of polycrystalline La2−𝑥Ca𝑥CoMnO6 (0 ≤ 𝑥 ≤ 0.75) compounds are investigated by x-ray diffraction and magnetometry. All the samples have an orthorhombic structure and show a slight decrease in the unit cell with Ca-doping. Temperature-dependent magnetization measurements reveal a complex magnetic behavior with two ferromagnetic transitions. These transitions are ascribed to Co2+–Mn4+ and Co3+–Mn3+ couplings and suggest the presence of additional antiferromagnetic couplings in these disordered compounds. Field-dependent magnetization curves, measured after cooling the samples in a zero external magnetic field, reveal the spontaneous exchange bias (SEB) effect for the Ca-doped samples. The strengthening of the uncompensated magnetic coupling at the interfaces, caused by the increased antiferromagnetic phase, explains the increase of SEB with increasing the Ca-content
dc.identifier.citationJESUS, J. R.; BUFAIÇAL, L ; BITTAR, E. M. The spontaneous exchange bias effect in La2−𝑥Ca𝑥CoMnO6 series. Journal of Magnetism and Magnetic Materials, Amsterdam, v. 556, e169402, 2022. DOI: 10.1016/j.jmmm.2022.169402. Disponível em: https://www.sciencedirect.com/science/article/pii/S0304885322003377. Acesso em: 16 fev. 2024.
dc.identifier.doi10.1016/j.jmmm.2022.169402
dc.identifier.issn0304-8853
dc.identifier.issne- 1873-4766
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0304885322003377
dc.language.isoeng
dc.publisher.countryHolanda
dc.publisher.departmentInstituto de Física - IF (RMG)
dc.rightsAcesso Restrito
dc.subjectDouble-perovskite
dc.subjectCobalt
dc.subjectManganese
dc.subjectExchange bias
dc.titleThe spontaneous exchange bias effect in La2−𝑥Ca𝑥CoMnO6 series
dc.typeArtigo

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