Negative magnetization in the zero field-cooled and exchange-bias effect in Cu-doped PrCrO3


Por: Mendivil, L. F., Alvarado-Rivera, J., Tavizon, G., Verdin, E., Arenas-Alatorre, J., Duran, A.

Publicada: 1 oct 2021 Ahead of Print: 1 sep 2021
Resumen:
High-quality nanometric and homogeneous particles of Cu-doped PrCrO3 ceramic compounds were synthesized by the hydrothermal-assisted sol-gel method. Structural, chemical state, morphology, and magnetic properties were investigated in the PrCr1-xCuxO3 orthochromite with 0 <= x <= 0.1 composition. XRD patterns show a complete solubility of the Cu ion, as well as an increase of the orthorhombic cell volume. The microstructural analysis (SEM) shows that the nanometric-size particles obtained from the synthesis process coalesce during the subsequent high-temperature process. In addition, XPS analysis revealed that the solubility and charge compensations by aliovalent Cu2+ ions substitution are driven by the change of the oxidation state from Cr3+ to Cr5+ and Cr6+. These results produce novel changes in the magnetic properties. There, the ZFC-mode shows negative magnetization in all investigated samples, and it is discussed as an intrinsic phenomenon in terms of the Gamma(2) (F-x, C-y, G(z)) spin configuration as well as the arising of the diamagnetic Cr6+ (d(o)). It is noted that Cr6+ tunes the diamagnetic magnitude during the ZFC protocol. On the other hand, different oxidation states are observed at the Cr site in PrCrO3, whose final result is an increase of the coercivity field, Hc, and the remanent magnetization, Mr, in the M-H curves. The increase of ferromagnetic and the antiferromagnetic domains sharing the same volume leads to an anisotropic magnetic interaction, called exchange-bias effect. It is observed that the Cu-doped PrCrO3 decreases the exchange-bias effect, but at the same time an increase in the magnetic properties is observed at 2 K.

Filiaciones:
Mendivil, L. F.:
 Univ Sonora, Dept Fis, Posgrad Nanotecnol, Hermosillo 83000, Sonora, Mexico

Alvarado-Rivera, J.:
 Univ Sonora, Dept Fis, Conacyt, Hermosillo 83000, Sonora, Mexico

Tavizon, G.:
 Univ Nacl Autonoma Mexico, Fac Quim, Dept Fis & Quim Teor, Ciudad De Mexico 04510, Mexico

Verdin, E.:
 Univ Sonora, Dept Fis, Hermosillo 83000, Sonora, Mexico

Arenas-Alatorre, J.:
 Univ Nacl Autonoma Mexico, Inst Fis, Ciudad De Mexico 04510, Mexico

Duran, A.:
 Univ Nacl Autonoma Mexico, Ctr Nanociencias & Nanotecnol, Km 107 Carretera Tijuana Ensenada, Ensenada 22800, Baja California, Mexico
ISSN: 09574522





JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
Editorial
Kluwer Academic Publishers, VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS, Países Bajos
Tipo de documento: Article
Volumen: 32 Número: 19
Páginas: 24484-24495
WOS Id: 000693478100004